herky400M Posted January 8, 2011 Share Posted January 8, 2011 Hello C-130 world, just out of curiousity : what is the wheel rolling resistance of the C-130?:confused: happy new year and a good health to everyone and lots of C-130 love!:cool: herky400m Quote Link to comment Share on other sites More sharing options...
bonzo Posted January 8, 2011 Share Posted January 8, 2011 I think there are toomany factors. Tirepressure, type of surface you rolling it on,new tire or old tire, weight of the aircraft with or without fuel and with or without cargo. Maybe a pilot can tell you, I just have a highschool diploma and fix aircraft. Pilots have college degrees and fly the thing and break them for us. To me its basicly a thing of releasing the breaks and if it doesnt move, just push the throttles a little more. Hope that works. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted January 10, 2011 Share Posted January 10, 2011 What would generate a question like this? Just wondering.... maybe a point of view (for your question) would help get you what your looking for. Too many varibles to answer your question. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted January 10, 2011 Share Posted January 10, 2011 (edited) You'll probably have to contact the manufacturer. A large part of the resistance is formulated by construction and compound. There is no mention of any of that in the mil spec, MIL-PRF-5041K. It only mentions requirements for speed and ply rating in the performance section. Edited January 10, 2011 by tinyclark Quote Link to comment Share on other sites More sharing options...
tenten Posted January 10, 2011 Share Posted January 10, 2011 Based on the fact that the “rolling resistance†of a wheel/tire is a function of velocity and deflection; We should not exceed the maximum tire speed of 174 knots (for type VII tires). And the maximum tire deflection of 35% (for high strength airfields) or 39% deflection (for marginal strength airfields). Ref. FM 382C-14E (Section 1 page 6 & 24) Quote Link to comment Share on other sites More sharing options...
tinyclark Posted January 12, 2011 Share Posted January 12, 2011 Rolling resistance, sometimes called rolling friction or rolling drag, is the resistance that occurs when a round object such as a ball or tire rolls on a flat surface, in steady velocity straight line motion. It is caused mainly by the deformation of the object, the deformation of the surface, or both. Additional contributing factors include wheel radius, forward speed, surface adhesion, and relative micro-sliding between the surfaces of contact. It depends very much on the material of the wheel or tire and the sort of ground. For example, rubber will give a bigger rolling resistance than steel. Also, sand on the ground will give more rolling resistance than concrete. Any moving wheeled vehicle will gradually slow down due to rolling resistance including that of the bearings, but a train car with steel wheels running on steel rails will roll farther than a bus of the same mass with rubber tires running on tarmac. The coefficient of rolling resistance is generally much smaller for tires or balls than the coefficient of sliding friction. Wikipedia Quote Link to comment Share on other sites More sharing options...
jetcal1 Posted January 12, 2011 Share Posted January 12, 2011 "It depends very much on the material of the wheel or tire and the sort of ground." Does this mean the wheel will encounter less resistance running over the airman versus the maintenance chief? Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted January 13, 2011 Share Posted January 13, 2011 Yeah, cause generally the mx chief is alot fatter. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted January 13, 2011 Share Posted January 13, 2011 Yea, and he's still in his truck. Quote Link to comment Share on other sites More sharing options...
herky400M Posted January 17, 2011 Author Share Posted January 17, 2011 gents, they, wheelchair users 50-100, going to try to move a C-130 and roll for 100 meters(328ft), full fuel and a payload of 16.000lbs. just 4 guinessbook Quote Link to comment Share on other sites More sharing options...
Muff Millen Posted January 17, 2011 Share Posted January 17, 2011 I remember one time at CCK when a Wing winnie Maj Nav came out to fly with our crew to get his monthly requirements completed. He set his crew bag on the ramp in front of the plane and expected one of the enlisted crew to bring it on board for him....well you know those sneaky untrustworthy enlisted...they are always up to something...as we taxied out there was a bump and the plane seemed to jump...that is when the nav came up on intercom an asked if anyone had seen his bag...almost split a gut from keeping from laughing out loud. We stopped, load opened the ramp and called that there was a bag laying on the ramp behind the plane...nav ran out and retrieved it.....I'll bet he took good care of his bags after that....I'm still laughing. OBTW Did not cause much resistance to the wheel movement. Muff Quote Link to comment Share on other sites More sharing options...
steve haigler Posted January 24, 2011 Share Posted January 24, 2011 Just trying to help Herky400, Try Mr. Google and enter "coefficient of friction" there is a plethera of conditions,materials, temps, and surface formulals for you to compute. Steve Quote Link to comment Share on other sites More sharing options...
herky400M Posted January 26, 2011 Author Share Posted January 26, 2011 hello C-130 world, we did actually the test with a dynamometer and a C-130 ==> 81.000+28.000lbs needs 2200lbs to move forward, after wise in movent only 660lbs. nice to know! Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted January 29, 2011 Share Posted January 29, 2011 Now inflate NEW tires to max allowable, (Paint or choose a painted area to be rolled over) and see what the requirement is. Quote Link to comment Share on other sites More sharing options...
tenten Posted January 29, 2011 Share Posted January 29, 2011 For the original poster; check this link to get detailed study to what you are asking for. http://handle.dtic.mil/100.2/AD746304 For the others; "save your time". Quote Link to comment Share on other sites More sharing options...
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