I recognize that the passage you cite is form 14 CFR part 1 section?? 23.925 
Propeller clearance. ?I don't have this part of the CFRs in my FAR/AIM. ?Can 
you tell me where you found it online? ?Does this apply just to LSAs or all 
aircraft? ?I would have never guessed that there was a reg for prop clearance.


________________________________
 From: Paul Smith <pk.smith at bigpond.net.au>
To: KRnet <krnet at list.krnet.org> 
Sent: Friday, January 3, 2014 9:08 PM
Subject: Re: KR> Prop clearance


As a guide FAA states 

Unless smaller clearances are substantiated, propeller clearances with the
airplane at maximum weight, with the most adverse center of gravity, and with
the propeller in the most adverse pitch position, may not be less than the 
following:
(a) Ground clearance. There must be a clearance of at least seven inches 
(for each airplane with nose wheel landing gear) or nine inches (for each 
airplane with tail wheel landing gear) between each propeller and the ground 
with landing gear statically deflected and in the level takeoff, or taxiing 
attitude, 
whichever is most critical. In addition, there must be
 positive clearance 
between the propeller and the ground when in the level takeoff attitude 
with the critical [tire(s)] completely deflated and the corresponding landing 
gear strut bottomed.


Referring strictly to small taildraggers here, I have noticed that there are 
plenty of people out there that are reporting to be flying airplanes with less 
than 9" of prop clearance. Of these most are reporting 7-9", but occasionally 
as low as 6". These are for RV and smaller planes here. I suppose that anyone 
flying out of rough grass, gravel, etc. fields should put a premuim on ground 
clearance. But, for example, for those that intend to limit themselves to paved 
airports only, perhaps going a shade lower than the 9" standard is acceptable?

Sent from my iPad
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