Shoulder Harness & Belts

[JimC]

The BAS installation was STC'ed, and the attachment point was directly behind the pilot's head. We did not drill a hole in the spar, but I don't have more details than that. Remember, the BAS isn't a true 4-point. It has 3 points of attachment on the airframe and 4 points at the main buckle. The dual shoulder straps attach at a single point behind the pilot's head, split to go around the pilot's neck, and then two buckles attach at the center of the pilot's waist.

One nice feature of the AmSafe belts is that the 3rd shoulder harness is not required. Certainly we want it, but it's not a legal necessity. You can install the lap belt & airbag and fly safer than you were before while you wait on engineers and paperwork to determine how you will add the shoulder belt. The shoulder belt needs to cross the pilot's body diagonally, so the attachment point directly behind the pilot's head won't be appropriate.

[Kim Geyer]

I installed the BAS system in 4 of out planes. I did drill the spar like the plans said and yes it was a pain attaching the nut plate working through a little hole on top of the spar

[CO_Skymaster]

Thank you for the answers. I was going for the AMSafe, but there is currently no STC for 3-point on the Skymaster. I guess I like to have that feeling of being securely connected to my seat. I don't have that feeling with a 2-point system. I'm going to investigate the B.A.S seatbelts at least for the pilot and co-pilot. I was hoping that I could do the same to the seats behind me, but if I have to stay 2-point on those, I can live with it.

Karl

[hharney]

I installed the BAS system 12 years ago and I have no regrets. It's a great system and I think the angle that the upper straps are at is comfortable.