Search found 2622 matches

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by kitplane01
Tue Sep 06, 2022 8:43 pm
Forum: Military Aviation & Space Flight
Topic: SLS / Orion - Tests, Launches, & Developments
Replies: 496
Views: 56174

Re: SLS / Orion - Tests, Launches, & Developments

Math says max efficency is to carry the highest ISP fuel the highest, and burn the lowest ISP fuel as close to the ground as possible. Therefore the LOX+H engines *should* be the ones to throttle back, and the SRBs should be at max power. The efficiency of the stack is the combined efficiency of th...

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by kitplane01
Tue Sep 06, 2022 8:02 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

bikerthai wrote:
kitplane01 wrote:
Neither China nor Russia nor have access to the best technology to build jet engines.


See ground rule 2 on the original post.

bt


I remember (I wrote it). I was just arguing what you wrote, not that China and Russia cannot make jet engines.

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by kitplane01
Tue Sep 06, 2022 5:51 am
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

I think the comparison by country / nation is a bit meaningless. Ding Ding. The technology for manufacturing of jet engines do not belong to any individual country but the multinational corporations that builds them. Things like single crystal casting of the turbine blades, to the superplastic form...

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by kitplane01
Tue Sep 06, 2022 5:46 am
Forum: Military Aviation & Space Flight
Topic: SLS / Orion - Tests, Launches, & Developments
Replies: 496
Views: 56174

Re: SLS / Orion - Tests, Launches, & Developments

The current RSRMV SRB has only marginal improvements over the shuttle era, because of the need to use up the existing inventory. The follow on BOLE, which is based on the OmegA, is significantly improved. It has composite casing, which means it carries much more propellant for the same weight, with...

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by kitplane01
Sat Sep 03, 2022 8:13 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

No it doesn’t. Where do you get all these ideas from? Do you even know what France has sent to Saudi? In the 80’s in terms of combat aircraft they tried hard but were beaten by.........Tornado. Don’t you think that Saudi buying large numbers of Tornados in the 80’s and 90’s, a UK/German/Italian pro...

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by kitplane01
Fri Sep 02, 2022 5:12 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

Within the EU + EEA are no restrictions. Just if the producer wants to export it outside of EEA/EU, they have to get a license. So just building and using it there is no problem. France might want all of its aircraft built in France. If the engine contains significant German parts … the Saudi expor...

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by kitplane01
Thu Sep 01, 2022 6:05 am
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

Except when Germany decides you can't export this or that to such and such country... Within the EU + EEA are no restrictions. Just if the producer wants to export it outside of EEA/EU, they have to get a license. So just building and using it there is no problem. France might want all of its aircr...

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by kitplane01
Tue Aug 30, 2022 4:26 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

The biggest single upgrade, outside of a series of software module changes/upgrades/maintainability stuff which is boring for us to discuss, would to me be the integration of a directed energy weapon. This again would benefit from a maxed out electrical capacity from the engine, imho. I really real...

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by kitplane01
Tue Aug 30, 2022 4:24 am
Forum: Military Aviation & Space Flight
Topic: No F-22B version
Replies: 60
Views: 5508

Re: No F-22B version

The answer to all your questions is money. Building them and operating them was super expensive, and the F-35 was to be *much* cheaper.

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by kitplane01
Thu Aug 25, 2022 6:59 pm
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

No. The J-10 (First flight 1998) is in no way a copy of the Saab Viggen (First flight 1967). They both have delta wings and canards, but so does every fighter made in Europe in the last 20 years (and they are not copies of the Viggen either). That combination is just one of the standard solutions t...

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by kitplane01
Thu Aug 25, 2022 6:50 pm
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

I think the long term future for the Turkish Air Force involves repairing relations with the U.S. after Edrogan is gone and re-entering the F-35 program. And they need to swallow their pride and scrap the stealth fighter program that is going to suck up tremendous amounts of money and resources. Bu...

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by kitplane01
Thu Aug 25, 2022 8:18 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

No one thinks the J-10 or the J-20 are a copy of anything ... and most people believe both are potent fighters. What you wrote was more true in the past than now The J-10 is a rough copy of the Saab Viggen. The J-20 is more original but copies many elements of the F-22, adapting them to the J-10 ca...

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by kitplane01
Thu Aug 25, 2022 8:11 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

What you wrote about the F-15/F-16 is kind of like "they are good except they're gonna get shot down". What does "less stealthy but good surviviability" even mean? It sure doesn't mean "successfully runs from missiles" or "can take a missile hit and keep flying&qu...

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by kitplane01
Thu Aug 25, 2022 8:07 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

https://www.defensenews.com/pentagon/2022/08/16/us-holds-fire-on-reports-of-turkeys-second-s-400-shipment/ Think they will just keep pushing it until they are kicked out of the NATO. In my opinion... Turkey is not going to scrap S-400 at this point Turkey is not going to stop being an authoritarian...

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by kitplane01
Thu Aug 25, 2022 8:04 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

NATO member Turkey dropped its opposition to Finland and Sweden joining NATO. If US Congress is going to block supply of US aircraft or engines to NATO member Turkey, what has Turkey received in return? Sweden and Finland have banned some Kurdish groups the Turkish government doesn't like. Not ever...

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by kitplane01
Thu Aug 25, 2022 8:01 am
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

Not used in "sort of manned combat aircraft" but on a tactical cruise missile AV-TM300 (or MTC300): https://www.turbomachine.com.br/ https://static.wixstatic.com/media/e3761a_2020602b65a749cfac7b96abc34bf6f1~mv2_d_2000_2000_s_2.png/v1/fill/w_420,h_276,al_c,q_85,usm_0.66_1.00_0.01,enc_auto...

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by kitplane01
Wed Aug 24, 2022 2:01 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

Is there any reason to think it wouldn't be? No one knows what China will have in 10 years. But when my guess some brand new fighter is in the works. True, but historically China has copied existing designs, and the copies have not had the same capabilities as the originals. When 6th gen fighters a...

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by kitplane01
Wed Aug 24, 2022 1:56 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

https://www.defensenews.com/pentagon/2022/08/16/us-holds-fire-on-reports-of-turkeys-second-s-400-shipment/ Senate Foreign Relations Committee Chairman Bob Menendez, D-N.J., has threatened to block the F-16 sale over Turkey’s continued possession of the S-400s, its violations of Greek airspace and C...

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by kitplane01
Tue Aug 23, 2022 8:28 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

Avatar2go wrote:
Is there any reason to think it wouldn't be?


No one knows what China will have in 10 years. But when my guess some brand new fighter is in the works.

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by kitplane01
Tue Aug 23, 2022 8:27 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

Re: An upgraded F-35 in 10 years

My opinion is that the F-35 will only get upgrades that reduce cost. The USAF will soon have the 6th generation fighter to offer high performance. The F-35 will move down the ranks to become the medium capability fighter. The F-35 is needed to make up the numbers so operating and purchase costs wil...

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by kitplane01
Tue Aug 23, 2022 2:09 am
Forum: Military Aviation & Space Flight
Topic: An upgraded F-35 in 10 years
Replies: 49
Views: 4477

An upgraded F-35 in 10 years

Lets suppose the F-35 gets all the upgrades! * It gets a new engine from the Adaptive Engine Tranistion Program. * It gets Block 4 software, and then a bug-free very good Block 5. * The radar gets updated to whatever is best 10 years from now. * New missiles are developed. all sized to fit in the F-...

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by kitplane01
Mon Aug 22, 2022 11:48 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

Which countries make jet engines usable in a combat aircraft? It has to be useful in some sort of manned combat aircraft. Not transports, and not AWACS/ASW. Anything as good as a Mig-21 (and an M-346, T-50, etc are all good enough). Not used in "sort of manned combat aircraft" but on a ta...

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by kitplane01
Fri Aug 19, 2022 9:44 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

Spain and Italy (ITP Aero and Avio Aero) also produce components and have their own engine FAL. https://www.eurojet.de/innovation/ Producing components and having your own final assembly line is not enough. You need to be able to make a whole engine. I don’t think Spain and Italy can reach this thr...

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by kitplane01
Fri Aug 19, 2022 9:39 pm
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

International Aero Engines, whose V2500 powers many of the classic Airbus 320, is a Swiss company. ;-) MTU in Friedrichshafen can build their own engines, and they are also supplying parts for various engine types, including the V2500. Sweden is license-building the F404 engine for their Gripen jet...

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by kitplane01
Fri Aug 19, 2022 8:29 am
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Re: Which countries make jet engines?

So far I can only think of (1) USA (2) UK (3) France (4) China (5) Russia and (6) maybe Ukraine if they can still build the Ivchenko-Progress AI-222. I assume Germany and Japan could, if they cared to spend the time and money. India is trying without current success. Germany is building jet engines...

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by kitplane01
Fri Aug 19, 2022 6:28 am
Forum: Military Aviation & Space Flight
Topic: Which countries make jet engines?
Replies: 35
Views: 4229

Which countries make jet engines?

Which countries make jet engines usable in a combat aircraft? Rules: 1) Assembling a kit built by others does not count. You have to be able to build the whole engine, including things like the high pressure turbine. 2) It does not have to be super-modern. If it's no better than 1970s tech, that's f...

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by kitplane01
Fri Aug 19, 2022 2:18 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

Climb high. Start the afterburner. Get to Mach 1.6. Start the clock. Turn off the afterburer and go into a dive. Stop the clock. Continue the dive maintaining speed. The clock does not run. This would be done why? Who knows. Chasing someone in a dogfight??? The point is that the stated limitation i...

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by kitplane01
Thu Aug 18, 2022 7:14 pm
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

short bursts of time before there is a risk of structural damage and loss of stealth capability Not sure, but just because they call it after "burner allowance" it does not involve aerodynamic heating cause by excessive speed when using afterburners. bt They call it "afterburner allo...

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by kitplane01
Thu Aug 18, 2022 6:14 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

that is because of the stealth coatings/materials inability to handle high mach temperatures and not because mach 2 is "unnecessary" Not only the stealth coating, but the thermo property of the composite material of the skin itself. Ironically, for an aluminum skin, even though it does no...

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by kitplane01
Thu Aug 18, 2022 6:10 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

Well the Gripen C is an honest mach 2 airplane and the T-50 can only do 1.5, and the T-7 is an outright dog at mach 1.2, so neither of those aircraft have to use materials that can handle mach 2 heating. That might account for some of the cost. The Gripen C is mach-2 at high altitude only. What par...

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by kitplane01
Wed Aug 17, 2022 5:01 pm
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

I suspect it may not be valid to compare empty and takeoff weights, and conclude the airframes are structurally equivalent. As pointed out above there are materials needed for high speed flight, high g-loads, and high flight cycles at those loads. Also at least for the T-7, the lift capability is w...

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by kitplane01
Wed Aug 17, 2022 7:10 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

Also remember the Pareto principle or the 80/20 rule. Generally developing something 80% as good only costs 20% of the price. This applies to other things like phones. This is a key design philosophy of the LM Skunk works that allowed for rapid development. I might believe this is true in many area...

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by kitplane01
Wed Aug 17, 2022 7:03 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

The correct answer is fewer parts allowing for reduced assembly time. "The best part is no part. The best process is no process." - Elon Musk The Saab Gripen program started roughly 20 years before the Korean T-50 trainer. Improved CAD design and machining allows for a reduced parts count...

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by kitplane01
Wed Aug 17, 2022 1:10 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

Well the Gripen C is an honest mach 2 airplane and the T-50 can only do 1.5, and the T-7 is an outright dog at mach 1.2, so neither of those aircraft have to use materials that can handle mach 2 heating. That might account for some of the cost. The Gripen C is mach-2 at high altitude only. What par...

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by kitplane01
Wed Aug 17, 2022 12:25 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

My understanding (from various sources) is that the earlier Gripen was around $60M, with the E model expected to be in the range of an F-35 at around $80M. However the Gripen is far more capable than any of the primarily trainer aircraft you cited. The airframe is far stronger and more durable, and...

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by kitplane01
Wed Aug 17, 2022 12:17 am
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Re: Price of a Gripen vs T-50 or T-7a

I think you are mixing up Gripen C and Gripen E. Gripen C uses a Volvo version of GE F404; Gripen E uses GE F414. What is your source supporting a Gripen E cost of $100 million? My error. I was refering to the Gripen C, which might cost just $60M. https://www.shephardmedia.com/news/air-warfare/swed...

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by kitplane01
Tue Aug 16, 2022 8:45 pm
Forum: Military Aviation & Space Flight
Topic: Price of a Gripen vs T-50 or T-7a
Replies: 39
Views: 3363

Price of a Gripen vs T-50 or T-7a

The Gripen and the KAI T-50 both use the F-404 engine, and weigh within 3% of each other. Both are superonic, and can carry two crew. The T-7a is presumably very similar. A Gripen costs about around $100M, a T-50 costs about around $30M, and a T-7a costs less. Why does a Gripen costs so much? Are th...

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by kitplane01
Tue Aug 16, 2022 6:14 pm
Forum: Military Aviation & Space Flight
Topic: Best all around fighter, July 1 1997
Replies: 47
Views: 4029

Re: Best all around fighter, July 1 1997

lxman1 wrote:
The Tomcat followed by the F15 gets my vote.


OK. But it would be much more informative if you said why.

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by kitplane01
Tue Aug 16, 2022 5:29 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

Curious... how long is it likely to take to get a yea or nay from Congress? I ask that assuming that this deal is a little contentious and will not just be rubber stamped. There first must be an evaluation by various departments stating that the sale will not adversely affect US defense. Then if th...

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by kitplane01
Sun Aug 14, 2022 10:19 pm
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

The F-16’s (or rather, many of them) would seem to have a lot of life left, and a lot of countries/companies know how to upgrade them. I’d be surprised if they don’t order something newish in small quantities, but also get someone to do a SLEP/upgrade on the existing F-16 fleet. They ordered 80 upg...

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by kitplane01
Sat Aug 13, 2022 5:46 am
Forum: Civil Aviation
Topic: The Rest of Michigan Aviation Thread - 2022
Replies: 234
Views: 30698

Re: The Rest of Michigan Aviation Thread - 2022

Marquette just lost a flight to Detroit, and now has the lowest number of flights in recent memory. Escanaba is losing half it's flights (from 2 downto 1). Even before the cuts flights were mostly full, an always expensive. Now, crazy. Of course I know there is a pilot shortage, but Delta should be ...

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by kitplane01
Fri Aug 12, 2022 2:28 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Re: Future of the Turkish Air Force

Right now Turkey has 48 upgraded F-4s and 245 F-16C/D. None of this is what the kids call "modern". Turkey wanted F-35s, was approved for F-35s, and then un-approved because they bought Russian missiles. Turkey has requested 40 new F-16s and 80 F-16 upgrade kits. The white house has unoff...

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by kitplane01
Thu Aug 11, 2022 6:59 am
Forum: Military Aviation & Space Flight
Topic: Future of the Turkish Air Force
Replies: 39
Views: 5496

Future of the Turkish Air Force

Right now Turkey has 48 upgraded F-4s and 245 F-16C/D. None of this is what the kids call "modern". Turkey wanted F-35s, was approved for F-35s, and then un-approved because they bought Russian missiles. Turkey has requested 40 new F-16s and 80 F-16 upgrade kits. The white house has unoffi...

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by kitplane01
Tue Aug 09, 2022 4:53 am
Forum: Military Aviation & Space Flight
Topic: Future of western fighter production lines
Replies: 144
Views: 56024

Re: Future of western fighter production lines

Wouldn't buying essentially a Chinese jet like the FC-1/JF-17 further strain its relationship with NATO? Especially after all the fuss China is making around Taiwan? I'm sure they would sell it as buying a Pakistani airframe. It's hard to get mad at Turkey for buying someone else's fighter if you w...

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by kitplane01
Mon Aug 08, 2022 5:05 am
Forum: Military Aviation & Space Flight
Topic: Future of western fighter production lines
Replies: 144
Views: 56024

Re: Future of western fighter production lines

Wouldn't buying essentially a Chinese jet like the FC-1/JF-17 further strain its relationship with NATO? Especially after all the fuss China is making around Taiwan? I'm sure they would sell it as buying a Pakistani airframe. It's hard to get mad at Turkey for buying someone else's fighter if you w...

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by kitplane01
Sun Aug 07, 2022 5:22 am
Forum: Military Aviation & Space Flight
Topic: Future of western fighter production lines
Replies: 144
Views: 56024

Re: Future of western fighter production lines

Or .. Turkey buys JF-17s. Available without requiring an American engine or avionics. Can do about-sort-of the same role as an older F-16, and clearly better in several ways than an ancient F-4.

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by kitplane01
Sun Aug 07, 2022 5:20 am
Forum: Military Aviation & Space Flight
Topic: L3 & Air Tractor win SOCOM contract
Replies: 30
Views: 3749

Re: L3 & Air Tractor win SOCOM contract

Next ... folding wings! Just a few on a carrier to save the F18s and 'hawks from doing missions that don't need their capabilities. The "Someone go look at that ship and see what it is" stuff.

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by kitplane01
Wed Jul 27, 2022 7:06 am
Forum: Technical/Operations
Topic: Why no single-engine GA aircraft with contrarotating propellers?
Replies: 40
Views: 3866

Re: Why no single-engine GA aircraft with contrarotating propellers?

https://www.aopa.org/news-and-media/all ... -sensation
-->

And of course, the single bladed prop. It’s asymmetric, with half the blades of a normal prop. And it flies safely.

https://www.aopa.org/news-and-media/all ... -sensation

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by kitplane01
Wed Jul 27, 2022 3:37 am
Forum: Technical/Operations
Topic: Why no single-engine GA aircraft with contrarotating propellers?
Replies: 40
Views: 3866

Re: Why no single-engine GA aircraft with contrarotating propellers?

I think I know the answer to this, and it has to do with cost, complexity and weight. However, a contrarotating propeller setup on a single-engine GA aircraft would it much easier to fly. Anyone who's driven dual-prop and single prop boats knows what I'm talking about. As a bonus, it would save CFI...

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by kitplane01
Wed Jul 27, 2022 3:36 am
Forum: Technical/Operations
Topic: Why no single-engine GA aircraft with contrarotating propellers?
Replies: 40
Views: 3866

Re: Why no single-engine GA aircraft with contrarotating propellers?

Out of curiosity, how much does the proximity of the two propellers in the coaxial configuration affect performance? I imagine there would be a fair amount of turbulent air around both props. Or maybe just the aft prop. Or maybe not? It's actually a few-percent more effecient at turning power into ...

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