ronschreck
Well Known Member
I finally got around to installing the 7-point Hooker harness in my RV. The hard part is devising a second attach point for the lap belt. I suppose some will attach both belts to the stock attach points but that does not give the optimum geometry for the belts and does not provide redundancy for safety. I needed to provide a second set of attach points further forward for the ratcheting belt so that the belt will securely hold my upper thighs from raising off the seat during negative G flight.
I used a 3/4 inch square steel tube that is welded to two tabs that secure the tube to the two floor longerons with four AN-3 bolts. The bolts go through the longeron angles and into nut plates secured to a 1/16 inch thick steel doubler. I welded some little tabs onto the end of the 3/4 inch square tube to attach the ratcheting lap belt. The seat cushion is quite thick over the tube but I cut a bit of foam out to let the cushion rest on the tube.
Prior to installation:
Belt attachment detail:
Lap Belt 3 by Ron Schreck, on Flickr
Installed:
That ought to hold me!
I used a 3/4 inch square steel tube that is welded to two tabs that secure the tube to the two floor longerons with four AN-3 bolts. The bolts go through the longeron angles and into nut plates secured to a 1/16 inch thick steel doubler. I welded some little tabs onto the end of the 3/4 inch square tube to attach the ratcheting lap belt. The seat cushion is quite thick over the tube but I cut a bit of foam out to let the cushion rest on the tube.
Prior to installation:
Belt attachment detail:
Lap Belt 3 by Ron Schreck, on Flickr
Installed:
That ought to hold me!