Pietenpol-List: Re: Toolstock???
Posted: Wed Mar 08, 2017 9:53 pm
Original Posted By: "tools"
Ray; my comment about the weight of the hinges is on the "how the hinges are made"webpage that I posted the link to. Down at the bottom of that page is a pictureof a finished pair of the hinges with this caption:"... and here, after some 396 separate hand operations, is a pair of hinges. Approximateweight of this pair of hinges, minus the mounting screws and pivot pinhardware, is 0.64 oz, or about 0.38 lb for the complete set of 9 pairs. Sinceall of this weight is aft of the CG and on a very long moment arm, keepingthese parts light is important. Believe it or not, the moment created by this1/3 of a pound for a set of hinge castings out at the tail of my Air Camper isthe same as that created by 3 gallons of fuel (18 lbs) in the nose tank. Usethin AN washers on the clevis pins, don't use pins that are any longer than necessary,and clip the excess leg lengths off the cotter pins before setting them."--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 power, 72x36 Culver propRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Toolstock???
Ray; my comment about the weight of the hinges is on the "how the hinges are made"webpage that I posted the link to. Down at the bottom of that page is a pictureof a finished pair of the hinges with this caption:"... and here, after some 396 separate hand operations, is a pair of hinges. Approximateweight of this pair of hinges, minus the mounting screws and pivot pinhardware, is 0.64 oz, or about 0.38 lb for the complete set of 9 pairs. Sinceall of this weight is aft of the CG and on a very long moment arm, keepingthese parts light is important. Believe it or not, the moment created by this1/3 of a pound for a set of hinge castings out at the tail of my Air Camper isthe same as that created by 3 gallons of fuel (18 lbs) in the nose tank. Usethin AN washers on the clevis pins, don't use pins that are any longer than necessary,and clip the excess leg lengths off the cotter pins before setting them."--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 power, 72x36 Culver propRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Toolstock???