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Towing A Passenger "space Vehicle" W/ 747  
User currently offlineCptkrell From United States of America, joined Sep 2001, 3219 posts, RR: 13
Posted (10 years 7 months 2 days 3 hours ago) and read 1585 times:

I just watched an interesting (but I think, questionable) presentation on the TV Travel Channel where it is proposed that a "conventional 747 jetliner could *easily* tow a 1-million pound commercial space vehicle to 20,000 feet and release it". Then the space vehicle would accelerate to give the passengers an around the world sightseeing flight at supposedly near Shuttle altitudes.

I don't have my calculator handy, and even if I did, I don't think I could figure this out, but, on surface it seems to me it would be stretching feasibility to tow one million lbs from rotate to 20,000 feet? Isn't the MTOW of the "greatest" 74 right at about a million lbs? Am I missing something here, or is this just another TV program? ...Jack


all best; jack
14 replies: All unread, jump to last
 
User currently offlineUSAFHummer From United States of America, joined May 2000, 10685 posts, RR: 53
Reply 1, posted (10 years 7 months 2 days 2 hours ago) and read 1593 times:

Did they give a source to where they possibly could have gotten that info from??? That definitely sounds a bit sketchy to me as well...

Greg



Chief A.net college football stadium self-pic guru
User currently offlineCptkrell From United States of America, joined Sep 2001, 3219 posts, RR: 13
Reply 2, posted (10 years 7 months 2 days 2 hours ago) and read 1576 times:

It was seemingly a pretty well produced piece with good computer graphics, etc., USAFHummer, however, I was in the midst of attending to some time-sensitive chemical stuff and only observed what I posted. I'm sure it will be re-aired, but I was curious about the claims and wondered if anyone else had heard of such...Jack


all best; jack
User currently offlineShenzhen From United States of America, joined Jun 2003, 1706 posts, RR: 2
Reply 3, posted (10 years 7 months 2 days 2 hours ago) and read 1576 times:

It is much easier to "tow" a load then to carry one. Just think of yourself as towing/pullng a wagon with 1000 pounds on it, or trying to carry it. Feasible, sure it you have a runway that will provide the length for the airspeed to get the "spaceship" in the air  Smile

I saw something very similar to what you saw, but it was a F4 fighter towing a 3 seater to 40 feet, releasing and then it firing some onboard rockets to get to space. However, the 3 seater didn't orbit the earth, just up and back down.


User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 4, posted (10 years 7 months 2 days 1 hour ago) and read 1555 times:

I too saw the footage of the F4 towing the large glider behind it. Remember the object in tow will be producing it's own lift.

User currently offlinePmk From United States of America, joined May 1999, 664 posts, RR: 2
Reply 5, posted (10 years 7 months 1 day 12 hours ago) and read 1489 times:

Well on the show they showed NASA video of what looked like a C141 towing an F4 with what appeared to be great ease. To be honest, I can see it working. Whethere the space thing would work who knows, but I'm sure a 7474 could carry quite a load by towing it.


User currently offlineMarkyboy From United Kingdom, joined Sep 2003, 207 posts, RR: 0
Reply 6, posted (10 years 7 months 1 day 10 hours ago) and read 1455 times:

I think I may have the answer to your question. I watched the same show I believe a while back on Discovery Wings. The program was British and the million pounds relates to the cost of the space vehicle (£1,000,000) as opposed to the weight 1,000,000 lbs.

I may be wrong, it happened once before!

Regards,

markyboy

P.S. This is my 1st post to the airliners.net forum ever. I have been a reader of the forums for a couple of years now as well as an admirer of the fine photography. Just took me till now to get the wallet out and pay to post!


User currently offlineAaron atp From United States of America, joined Mar 2000, 533 posts, RR: 2
Reply 7, posted (10 years 7 months 1 day 10 hours ago) and read 1449 times:

from the "757 glider" era at ATL... 2037's were in short supply.



if the image is clipped...


User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 8, posted (10 years 7 months 1 day 6 hours ago) and read 1411 times:

as that diagram suggests, why use a 747? i think that a 777 would make a much better platform for it.


"...cannot the kingdom of salvation take me home."
User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 9, posted (10 years 7 months 1 day 6 hours ago) and read 1400 times:

So is that diagram for real? A 777 could tow a 757? I'd love to see that for real.

User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 10, posted (10 years 7 months 1 day 5 hours ago) and read 1394 times:

most likely the 777 would have to be empty.


"...cannot the kingdom of salvation take me home."
User currently offlineUSAFHummer From United States of America, joined May 2000, 10685 posts, RR: 53
Reply 11, posted (10 years 7 months 1 day 2 hours ago) and read 1366 times:

The topic of the post is with the diagram is "A bit of old humour" so Im inclined to believe that its not real...whoever came up with it had one heck of an imagination though, kudos to them!

Greg



Chief A.net college football stadium self-pic guru
User currently offlineCptkrell From United States of America, joined Sep 2001, 3219 posts, RR: 13
Reply 12, posted (10 years 7 months 19 hours ago) and read 1332 times:

Thanks for the replies; I'm still searching for a re-run of the program I mentioned. Maybe it isn't so far-fetched, afterall...hack


all best; jack
User currently offlineAaron atp From United States of America, joined Mar 2000, 533 posts, RR: 2
Reply 13, posted (10 years 7 months 11 hours ago) and read 1286 times:

Actually, someone pulled that picture off my website and asked a question about it on this forum about 2 years ago.

The gentlemen at the Delta TOC were unable to overhaul 2037s fast enough, so there were always quite a few 757 'gliders' as we called them (aircraft without engines) in front of the big hangar and the paint hangar in atlanta.

I assure you that DL had no plans of such a thing (although they probably would have if they thought the FAA would have let them).


aaron


User currently offlineCptkrell From United States of America, joined Sep 2001, 3219 posts, RR: 13
Reply 14, posted (10 years 7 months 6 hours ago) and read 1246 times:

The DAL 757 glider pic is cool (for intended ops chuckles), however, now that I recall, DC3 gliders were at least experimented with during WWII with engines removed and cowlings aerodynamically fared over with blunt, bullet-nose profiles...Jack


all best; jack
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