Original Posted By: "Jim Markle"
Subject: Pietenpol-List: "sprung gear"To whomever ti was going to build the plans "sprung gear", I 'd like tosuggest making the shock struts J-3 style by turning the lower bungeecross tube 90 degrees to the top one, then spacing it the same distancefrom the top tube as on the J-3 and buying the factory made shock ringsfrom AS & S etc. Stories are that the 6' of bungee cord is a real painto install and get both sides equally tensioned. I made a tool to putrings on TriPacer shocks. Less than 10 min to install 4 rings. Lastnight I went to our EAA mtg, and one of the members reported attending aPiper forum by Clyde Smith who is a guru of fabric covered Pipers.Hislatest word is to NOT powder coat anything steel. He says the coating isso hard ( non flexing ) that it develops cracks letting moisture incausing corrosion. He reported a failure of a part that everyone thoughtshould have lasted forever under powder coating. Something else to worryabout. Leon S.________________________________________________________________________________
Pietenpol-List: "sprung gear"
Re: Pietenpol-List: "sprung gear"
Original Posted By: "Christian Bobka"
What you say might well be true, but I lost a Honda to rust that formedunder the power coat. My Buick is showing the same rusting symptoms underthe powder coat. I suppose that wouldn't be so bad except on both cars itwas on the rear suspension links. The attach point for a panhard link brokeoff on the Honda and the read differential rusted thru so let the gear lubeout. Now I understand that the corrosion exposure is much greater in a cardue to salt and moisture, but I wonder how a Florida plane would fare. Ihave seen the wing spar of a Florida based Cessna developed holes fromcorrosion. Once powder coat cracks and lets in moisture, the corrosionprocess is accelerated as it is protected from drying.Remember the FAA has yet to permit powder coating for aluminum as far as Iknow.Cy Galley - Chair, Emergency Aircraft RepairSafety Programs Editor - TCEAA Sport Pilot----- Original Message -----
What you say might well be true, but I lost a Honda to rust that formedunder the power coat. My Buick is showing the same rusting symptoms underthe powder coat. I suppose that wouldn't be so bad except on both cars itwas on the rear suspension links. The attach point for a panhard link brokeoff on the Honda and the read differential rusted thru so let the gear lubeout. Now I understand that the corrosion exposure is much greater in a cardue to salt and moisture, but I wonder how a Florida plane would fare. Ihave seen the wing spar of a Florida based Cessna developed holes fromcorrosion. Once powder coat cracks and lets in moisture, the corrosionprocess is accelerated as it is protected from drying.Remember the FAA has yet to permit powder coating for aluminum as far as Iknow.Cy Galley - Chair, Emergency Aircraft RepairSafety Programs Editor - TCEAA Sport Pilot----- Original Message -----