tinyclark Posted July 20, 2010 Share Posted July 20, 2010 The only problem I can see with being in the FL30s is that the IFF couldn't send out correct altitude in MODE C after 30,800', since the old E-models and early H's didn't have the D4 pulse hooked up to the altitude encoder. ATC would have shown you at 27,700' if you were at 33,800'. Quote Link to comment Share on other sites More sharing options...
bobdaley Posted July 20, 2010 Share Posted July 20, 2010 Highest for me 27,000 The published record for the Herk is 43,500 for 62-3487 on 12/16/1963. Cabin Altitude 43,500. 14 guys halo'd out of it at El Centro CA. The oold parachute test facility. We had 487 in the 706TAS at New Orleans for awhile. Bob Quote Link to comment Share on other sites More sharing options...
C130H2FE Posted July 20, 2010 Share Posted July 20, 2010 I've been to 33k, however when our 80's were new we took off the external tanks do to a problem with them for a short time, had one crew go to 42k, great fuel flow! Quote Link to comment Share on other sites More sharing options...
wukong Posted July 20, 2010 Share Posted July 20, 2010 Sometime in about December 1972 on a flight from Saigon to Utapao Mark Marz took our doggy 62 E model up to a mushy 33,000. In 1975 I flew one of the Super E's at Little Rock and took the empty airplane to FL350 with no effort at all. She climbed like a homesick angel. The indicated airspeed was very low but she still had a lot of unused power. Quote Link to comment Share on other sites More sharing options...
Guest Posted July 20, 2010 Share Posted July 20, 2010 1991 Between LTAG and EGUN FL350 for a short time in a "B" model. I've got a picture of the altimeter someplace. I'd have to get the form 5 out to check the airplane #. I remember the pressure got pretty low on the gauge by the Nav station and cabin was an rch below 10M JW Quote Link to comment Share on other sites More sharing options...
Dave in WV Posted July 20, 2010 Share Posted July 20, 2010 31,000 in an H2. Quote Link to comment Share on other sites More sharing options...
stumpy Posted July 20, 2010 Share Posted July 20, 2010 FL 350 in an E, FL 370 in an H, and FL 400 in a J. BTW, the J was at 10K cabin altitude. Quote Link to comment Share on other sites More sharing options...
gizzard Posted July 20, 2010 Share Posted July 20, 2010 HM, I read all the stuff about O2 use and cabin pressure and all that, I think maybe i was in an entirely different Air Force. We didn't do any of that, maybe we should have???? LOL load clear P. Quote Link to comment Share on other sites More sharing options...
donwon Posted July 21, 2010 Share Posted July 21, 2010 From what I remember about 28,000 was about it for us. Quote Link to comment Share on other sites More sharing options...
Herkpilot Posted July 21, 2010 Share Posted July 21, 2010 29000 is the highest I've ever seen, probably could have pushed it higher but... Have been to 24999 for a HAHO many times and it was uncomfortable every time. Quote Link to comment Share on other sites More sharing options...
DC10FE Posted July 21, 2010 Share Posted July 21, 2010 42,900 in a brand new 1974 H-model between Jeddah & Dhahran. Almost hit 43,000 until a turbine overheat light flickered. I must've gulped down a liter of LOX when that happened. I can't remember the AC's name, but I remember he was buiding a cement sail boat back at Dyess AFB that he was gonna sail to Hawaii. It all sorta comes together, doesn't it? Cement sail boat; 40,000'+ in a C-130. Don R. Quote Link to comment Share on other sites More sharing options...
trev130eng Posted July 21, 2010 Share Posted July 21, 2010 33K Muscat To Tanzania to pick up three baby giraffes from the Serengeti for the Sultans private zoo. Low level over Kilimanjaro's glacier, drinking Kilimanjaro beer with the maori girls. One of my best trips. Quote Link to comment Share on other sites More sharing options...
herky Posted July 29, 2010 Share Posted July 29, 2010 we were at 36700 during apollo13 support of of samoa,in 65-973(HC130H) Quote Link to comment Share on other sites More sharing options...
steve haigler Posted November 3, 2010 Share Posted November 3, 2010 33,000' in an A model with a cabin of about 7,000 in U.S. from Charly to MKE. Steve Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted November 3, 2010 Share Posted November 3, 2010 31,000' in an E-model here in the states in the winter, 35,000' in an AMP couple years ago at Edwards...unpressurized. Don't really care to do that again. Quote Link to comment Share on other sites More sharing options...
lownslow Posted November 4, 2010 Share Posted November 4, 2010 How high have you flown in a Herk? 31,000 ft.. Highest I've been in a herk, but I'm sure a lot of you have been higher. This was on our way to Andoya, Norway.. 15" mercury. Nice and tight for a 1963 model.. Hopefully that pic of the pressure controller wasn't taken at 310 because the pressure controller should have been set somewhat higher than that if so. :-). 290 is the highest for me. Not too bad in an e-model. We wanted to go to 310 but ATC said no. Quote Link to comment Share on other sites More sharing options...
tenten Posted November 4, 2010 Share Posted November 4, 2010 That is why we have asked the question what was the cabin altitude during the mission? Therefore; the two pictures was definitely not related to each other; the top picture might show what altitude brother “M_Wales†was flying during his mission from xxx to xxx, but the lower picture showing an airplane flying on an altitude not above 21,000 feet. Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted November 4, 2010 Share Posted November 4, 2010 Hopefully that pic of the pressure controller wasn't taken at 310 because the pressure controller should have been set somewhat higher than that if so. :-). 290 is the highest for me. Not too bad in an e-model. We wanted to go to 310 but ATC said no. Naw, just call that a check on the differential feature...seems to be working just fine! Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted November 4, 2010 Share Posted November 4, 2010 That is why we have asked the question what was the cabin altitude during the mission? Therefore; the two pictures was definitely not related to each other; the top picture might show what altitude brother “M_Wales” was flying during his mission from xxx to xxx, but the lower picture showing an airplane flying on an altitude not above 21,000 feet. What about the second pic would lead you to believe he wasn't above 21K??? Quote Link to comment Share on other sites More sharing options...
SamMcGowan Posted November 4, 2010 Share Posted November 4, 2010 We flew the bullshit bomber missions in the upper twenties, with the ramp and door open so no cabin altitude. It seems to me we usually dropped at FL270. My buddy Tom Stalvey told me a couple of weeks ago that he flew some HALO drops at FL410. As I recall, the normal max operating altitude for Herks was FL250 because there was no oxygen in the back for troops. For flights above that altitude there had to be an emergency oxygen system. I wouldn't even attempt to make a comment on cabin altitude since it was so long ago, but FAR 25 requirements call for a maximum cabin altitude of 10,000 feet at the maximum certified altitude of any Part 25 certified airplane. Quote Link to comment Share on other sites More sharing options...
tenten Posted November 4, 2010 Share Posted November 4, 2010 What about the second pic would lead you to believe he wasn't above 21K??? I got your point, so you believe that crew might be operating in MANUAL mode. In this case the flight engineer seems to be not following the correct procedures during manual operation; in which the cabin altitude selector should be set to 10,000 feet according to procedures, but not to leave the cabin altitude selector close to 1,000 feet. Yes, I believe brother “M_Wales†that he hit the 31k because he said so, but I don’t believe that the second pic was taken of an airplane above 21K with AUTO mode of operation. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted November 4, 2010 Share Posted November 4, 2010 Well if you do not set the pressure controller (to your flight level) and leave it as set on the ground the outflow valve will limit the pressure differential to (15.16) in automatic. The fact it is in a 63 model with a 30lb flight station pact it makes perfect sense (not by the book but...) The cabin altimiter should have been aprox 6000............ 31000 @15.16 limit ='s cabin alt of 6000' Quote Link to comment Share on other sites More sharing options...
tenten Posted November 4, 2010 Share Posted November 4, 2010 NATOPS1, You are correct, it can be in AUTO, but is it normal procedures to do so and to let the back-up system to correct your mistake of been not following procedures on setting the pressure controller? And what you achieve by doing so?! Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted November 4, 2010 Share Posted November 4, 2010 I got your point, so you believe that crew might be operating in MANUAL mode. In this case the flight engineer seems to be not following the correct procedures during manual operation; in which the cabin altitude selector should be set to 10,000 feet according to procedures, but not to leave the cabin altitude selector close to 1,000 feet. Yes, I believe brother “M_Wales” that he hit the 31k because he said so, but I don’t believe that the second pic was taken of an airplane above 21K with AUTO mode of operation. That wasn't my point...looks like a normal setting for AUTO PRESS to me. Since when is it procedure to set the cabin altitude to correspond with the 15.16in hg altitude during cruise in AUTO PRESS?? That isn't printed in the E(H) or H, or the (K)H dash ones. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted November 4, 2010 Share Posted November 4, 2010 "Since when is it procedure to set the cabin altitude to correspond with the 15.16in hg altitude during cruise in AUTO PRESS?? That isn't printed in the E(H) or H, or the (K)H dash ones." (check page 1-153) (-1 w/ change 12.... only copy I have) Our books (in the NORMAL operation of the pressurization system paragraph of the systems description section) say to "set Cabin ALT to desired cruise ALT." OUR desired cruise ALT is 500' above the actual aircraft curise ALT we WILL climb to. This keeps the system in the ISOBARIC (less than MAX DIFF) range. This way WE control the RATE of cabin change and the outflow valve does not cycle to maintain MAX pressure once we are at ALT. This altitude (say 25,000') if set on the ground (say sea level) will cause the aircraft to climb in the "NON pressurized" range until we get to the Cabin ALT the pressure controller is SET to maintain (3500' cabin) then start to build up a differential pressure. By setting the pressure controller below your aircraft ALT you are asking the outflow valve to maintain a cabin ALT LOWER (outflow valve more closed). Quote Link to comment Share on other sites More sharing options...
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