polcat Posted October 15, 2010 Share Posted October 15, 2010 Anyone know why Lockheed increased the brake pressure to 3000 psi when the H2 was introduced? Quote Link to comment Share on other sites More sharing options...
C130H2FE Posted October 19, 2010 Share Posted October 19, 2010 The 3000 psi brakes didn't show up untill about 83 models, oldest H2's don't have them, from what I gather the reason it was done was there was more braking avalible than the 2030 brakes could supply under certain conditions. when I do FCF's on dry runways it is very hard to get the anti skid to cycle to verify operations. My 2 cents. Quote Link to comment Share on other sites More sharing options...
talons1555 Posted October 19, 2010 Share Posted October 19, 2010 I know the Talon 1's got them in the 7th and I assume the gunships also got them, where any other airframes TCTO'd? Quote Link to comment Share on other sites More sharing options...
Lucky13 Posted October 28, 2010 Share Posted October 28, 2010 I can't speak with certainty about this specific brake issue, but I can say that the shift in aircraft hydraulics is towards higher PSI systems because they can create the same amount of force with smaller (therefore lighter) actuators. I worked in the development dept at Moog on the primary flight control actuators for the new Boeing 787 which uses all 5000 psi actuators for this reason. The Dreamliner is touted as the most efficient airliner to date because it's designed from the ground up to be as light as possible. Quote Link to comment Share on other sites More sharing options...
Dave in WV Posted October 29, 2010 Share Posted October 29, 2010 When they went to 3000 psi the brake assembly stayed the same. I know the '88 H2's have it (MC-130W's now) and the '79 H2's didn't. Quote Link to comment Share on other sites More sharing options...
sluggo Posted November 4, 2010 Share Posted November 4, 2010 From what I remember the brakes have always been 3000 PSI but a metering value was put in to reduce them to 2000PSI for the B model which had a weak nose section unable to stand heavy braking. For some reason the metering value was left in on the stronger E model and was not removed until later H2s. Quote Link to comment Share on other sites More sharing options...
Railrunner130 Posted November 5, 2010 Share Posted November 5, 2010 I think it was actually Texas with the 85 models that got the 3000 lbs. brakes first. Our 84s in Delaware have the old system. Quote Link to comment Share on other sites More sharing options...
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