PPRuNe Forums - View Single Post - American Airlines jet goes off runway in Jackson Hole, Wyoming
Old 18th Jan 2011, 18:19
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BobM2
 
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I would think that would create a significant increase in a thrust reverser ground strike depending on the touchdown attitude. Seem to remember no thrust reverser selection on the -200 until derotating.
When 737-200 was introduced in 1968 it had short nacelles with clamshell reverser doors much like 727. With this arrangement, reverse was very ineffective as reversers were under trailing edge flaps & tended to take weight off wheels when operated. The hydraulic "target" type reversers with extended nacelles were retrofitted by 1970 along with a nosewheel squat switch which prevented reverser operation until nosewheel touchdown. This was the configuration for about 10 years until it was decided that ground strike was not a concern & the nosewheel switch was removed. After that, reverse was available simultaneous with main gear touchdown & I don't recall any problems with ground strikes.
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