Originally Posted by climberrn
Agreed. My wife used to like a 4” wedge under her seat cushion for the visibility. One morning we hit some nasty turbulence crossing the Sierras. When her head hit the canopy and got a bloody knot I got her a 1.5” lift instead. 3-4” clearance works well.
Tight straps only helps so much when it gets real bumpy.
I prefer to be higher than a 4" gap but all of the RV's I fly (including my own) have 5 point harnesses.
A 5 point harness... properly adjusted, goes a long way to keeping you down tight in the seat. A 4 point harness allows a lot of vertical movement by comparison.
The crotch strap and lap belt do most of the work restricting vertical movement. The shoulder straps help a little but with the anchor point so far aft of the seat (other than the RV-4 and 8) they mostly just prevent fwd movement (which is also much improved with the crotch strap because it prevents the shoulder straps from pulling the lap belt upward).
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Van's Aircraft Engineering Prototype Shop Manager
RV-6A (aka "Junkyard Special ")
Last edited by rvbuilder2002 : 06-28-2020 at 01:55 PM.