Original Posted By: Gary Gower
Pietenpol-List: strap fitting between landing/flying wire attach
Re: Pietenpol-List: strap fitting between landing/flying wire attach points
Original Posted By: "hjarrett"
attach pointsSubject: Re: Pietenpol-List: strap fitting between landing/flying wire attach pointsIn a message dated 9/8/04 8:17:04 AM Central Daylight Time, douweblumberg(at)earthlink.net writes:>Those straps need to be there, and are shown on Drawing No. 3. B.H.P. used them. For new construction you can incorporate them into the tongue that attaches the lower end of the lift struts, and use .060" X 2" wide straps. Thisis what the illustration shows. Weld the gear lugs right to the bottom. Theygo across the bottom, between the lift strut / gear attach fittings. They accept the G loads of the wing, when you drop it in on landing. I had some nasty squawks in this area, to take care of before I went on my 'Tour America'. On the front strap, it bowed down away from the bottom of thefuse. The aft strap has bolts through it, securing the safety strap for the control torque tube, rudder bar support, master cylinder pivots, and seat beltlugs. No problem on the aft strap. I drilled one hole in the middle of the front strap, but it was still not enough. The strap now bows down on the leftside, between the gear lug, and bolt. I will add another bolt to each side ofthe center bolt, for a total of three #10 bolts spaced evenly across the strap. I also had to rework the four 'L' brackets on the inside. They were notthick enough, and were not 4130 steel, so the bolt torque dimpled them. I madenew ones, and used .060" for the inside 'L' brackets. This was the same AOG (aircraft on ground) period that I built spring struts, to replace the bunji struts. I much prefer the spring struts. I have tested this airframe design to the extreem, by bounding in some really nasty landings, and I can't break it !! The best part is that I can regain control. Bernard Harold Pietenpol really got it right in his design...don't change it !!Chuck GantzerNX770CG________________________________________________________________________________
attach pointsSubject: Re: Pietenpol-List: strap fitting between landing/flying wire attach pointsIn a message dated 9/8/04 8:17:04 AM Central Daylight Time, douweblumberg(at)earthlink.net writes:>Those straps need to be there, and are shown on Drawing No. 3. B.H.P. used them. For new construction you can incorporate them into the tongue that attaches the lower end of the lift struts, and use .060" X 2" wide straps. Thisis what the illustration shows. Weld the gear lugs right to the bottom. Theygo across the bottom, between the lift strut / gear attach fittings. They accept the G loads of the wing, when you drop it in on landing. I had some nasty squawks in this area, to take care of before I went on my 'Tour America'. On the front strap, it bowed down away from the bottom of thefuse. The aft strap has bolts through it, securing the safety strap for the control torque tube, rudder bar support, master cylinder pivots, and seat beltlugs. No problem on the aft strap. I drilled one hole in the middle of the front strap, but it was still not enough. The strap now bows down on the leftside, between the gear lug, and bolt. I will add another bolt to each side ofthe center bolt, for a total of three #10 bolts spaced evenly across the strap. I also had to rework the four 'L' brackets on the inside. They were notthick enough, and were not 4130 steel, so the bolt torque dimpled them. I madenew ones, and used .060" for the inside 'L' brackets. This was the same AOG (aircraft on ground) period that I built spring struts, to replace the bunji struts. I much prefer the spring struts. I have tested this airframe design to the extreem, by bounding in some really nasty landings, and I can't break it !! The best part is that I can regain control. Bernard Harold Pietenpol really got it right in his design...don't change it !!Chuck GantzerNX770CG________________________________________________________________________________