steveg1988
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KC-135 Question

Fri Jul 30, 2010 4:34 pm

When did they install the spot light on the end of the tail mounted HF antenna? I know the tail was made taller in the mid 60s, but a few images from the 1980s lack the rear spot light.
 
IMissPiedmont
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RE: KC-135 Question

Fri Jul 30, 2010 9:01 pm

I believe that light was an option some airlines had on their 707s and since the vertical stabilizer transplant was part of the KC-135R conversion some have it and some don't.
The day you stop learning is the day you should die.
 
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kc135topboom
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RE: KC-135 Question

Fri Jul 30, 2010 11:22 pm

No, the tail monted spotlight was added beginning around 1984. It improved night time refueling by giving a little more depth preception to the Boom Operator when refueling receivers painted in the "European-1" camoflage (B-52, FB-111) and the "Lizard skin" paint on the C-141Bs and C-5A/Bs.

It also helped a lot in night refueling of C-5As that still had the "MAC" standard white and gray, but had the upper wing reskinned, which was painted in Lizard Skin. This was probibly the weirdest paint schem I can remember. The C-5 guys here can probably fill you in more on those airplanes.

It was a locally added mod, dome by the OMS and FMS troops, although airplanes scheduled for PDM when the TCTO was approved had it installed at depots. About that same time we also got a Boom Trim system.

There were 8 individual lamps, in two four lamp globes and controlled by a reostate with 10 light level selections. Each different receiver had a different light level selection.
 
Galaxy5007
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RE: KC-135 Question

Fri Jul 30, 2010 11:46 pm

Quoting KC135TopBoom (Reply 2):
It also helped a lot in night refueling of C-5As that still had the "MAC" standard white and gray, but had the upper wing reskinned, which was painted in Lizard Skin. This was probibly the weirdest paint schem I can remember. The C-5 guys here can probably fill you in more on those airplanes.

The Lizard Skin wings were installed during the Pacer Wing program when they rewinged the A models. Since they were doing this along with the B model production, all of the wings were pre-painted before being installed. So when the A models went in to get re-winged, they did it based on the aircraft that had the worst cracks first, which didn't necessarily coincide with the PDM. Thats why they had the conflicting color schemes for a short while in the 80s. Only two C-5s were never painted in the lizard camo scheme (68-0214 and 68-0217). They kept the white and grey scheme until they all changed over to gray.


I have a question as well; I'm not very familiar at all with the KC-135, so I don't mean to look dumb asking this, but why do they have a pogo stick at the back of the plane when its parked? Is the aircraft tail heavy?
 
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Moose135
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RE: KC-135 Question

Sat Jul 31, 2010 12:10 am

Quoting Galaxy5007 (Reply 3):
I have a question as well; I'm not very familiar at all with the KC-135, so I don't mean to look dumb asking this, but why do they have a pogo stick at the back of the plane when its parked? Is the aircraft tail heavy?

Don't worry - you know a lot more about the C-5 than I ever will...

Yes, it would be possible to drop the aircraft on its tail if you loaded cargo improperly, or if you weren't careful about refueling. If I remember, it would get tail-heavy if you didn't have much fuel in the forward body tank and added fuel elsewhere. I do remember landing at very light fuel loads, and having an extra large last step off the ladder, since the nose strut was so extended.
KC-135 - Passing gas and taking names!
 
steveg1988
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RE: KC-135 Question

Sat Jul 31, 2010 5:30 am

Yeah, i refuel the KC-135 series and i have to make sure that the crew chiefs have the tail stand installed before i start to load fuel, it is due to center of gravity issues that most jets never have to deal with due to not having body tanks. For the record KC-135T's are awesome due to how fast you can load fuel onto them, 700 Gallons per minute max vs 400 for our hydrant trucks due to using two hoses instead of one.

Also, anybody know a good flight simulator 2004/X KC-135?
 
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kc135topboom
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RE: KC-135 Question

Sat Jul 31, 2010 10:28 am

Quoting Galaxy5007 (Reply 3):
I have a question as well; I'm not very familiar at all with the KC-135, so I don't mean to look dumb asking this, but why do they have a pogo stick at the back of the plane when its parked? Is the aircraft tail heavy?
Quoting moose135 (Reply 4):
moose135
Quoting steveg1988 (Reply 5):
steveg1988

Yes, the KC-135A/E/R is very tail heavy, not as much on the KC-135Q/T. Most of the extra tail weight was added after production of the airplane in the 1950s and 1960s. The Pacer Fin project installed a taller, heavier vertical stabizer, which is some 18" taller than the original fin, and added a powered rudder, which the original did not have. Also the "belly bands" added weight and incorproated some additional internal structures to strenghten the fuselage aft of the wing. Most of the cargo tie down chains, straps, and devices are stowed in boxes under the troop seats, aft of the wing. The gasious oxygen system is over the Boom Pod from its original placement just aft of the right overwing hatch. It was moved to facilitate the installation of the "live aboard kit". A second gasious system was added on top of this system to replace the LOX system in the lower nose compartment.

Of course the "R" and "T" mods added a second APU, which is near the Boom Pod.

The KC-135Q/T have less of an aft CG because they have some 850 lbs of ballest under the radar. The reason was to assure you would not land beyond the aft CG limit if all the body JP-7 fuel was offloaded to a SR-71, and they did not want you to transfer fuel from the centerwing tank forward as it carried JP-4 fuel and maintenance did not want the forward body fuel tank fuel comtaminated.

Most KC-135s also got "high speed Booms" after production, as opposed to the "low speed Boom" originally installed. The difference was a more stable Boom at higher airspeeds, and it was some 100 lbs heavier.

The tail stand is installed soon after landing by the Crew Chief. Sometimes the Boom Operator would offload the tail stand through the aft hatch to the Crew Chief on the ground, but most times the Crew Chief or Assistant Crew Chief would do that.

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