Pietenpol-List: Shock Cord

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Pietenpol-List: Shock Cord

Post by matronics »

Original Posted By: "bender"
No- there is no extra weight behind the CG. Everything is to plans with the trimsystem (aluminum) installed due to my weight 280lbs. Holding stick pressureit fine but I prefer trim to assist with that. Also, the weight of my trim systemis 1.45 lbs. acceptable to me, not excessive by any means!The outside bell crank arms are for two reasons: First - I like the look and nostalgiaof it and two-it keeps the control cables off the stabilizer. Same outcomedifferent design, that's all.No stops on my control stick and the throw is acceptable with others who responded.Frankly, I see no reason to change anything at this point.As for aft CG, my weight is a big factor as well as keeping everything light. Ihave only necessary gauges with no compartments or accessories. Taking bets Icome well within overall plane weight!KMH Sent from my iPhoneOn Sep 9, 2011, at 11:57 AM, "womenfly2" wrote:> > Wow! ... that is a lot of weight behind the CG. I assume the rod with the springsattached is to trim the elevator?> > Why the elevator cables on the outside? ... just because?> > My Piet never had an issue with elevator movements as based off the plans, 1933Fly & Gilder Manual. Throw was good, no need to worry about stops either. Trimwas per hand input to the stick, very light.> > ... to each their own.> > --------> > > > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 815#351815> > > > > > > > > > ________________________________________________________________________________Subject: Pietenpol-List: Shock Cord
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Pietenpol-List: Re: Push pull set-up

Post by matronics »

Original Posted By: "womenfly2"
Hey Guys..on the straight axle, i was wondering what size bungees you used..??i remember the last plane i built i tried to use something like 1/2 inch and discoveredthat it was almost impossible to wrap...preload... and adjust.. so iended up with about half hat size... like 1/4 inch stuff.it was a lighter plane.. i'm thinking longer lengths of 5/16 or two lengths on each side.BTW ratings i found were5/16......... 350 lbs 3/8............400 lbs1/2............ 450 lbsthese are on a single strand of cord..... so more wraps of smaller cord could beas strong as fewer wraps of large cord with more control of tightness right??jeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Push pull set-up
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Post by matronics »

Original Posted By: Ben Charvet
> No- there is no extra weight behind the CG. Everything is to plans with the trimsystem (aluminum) installed due to my weight 280lbs. Holding stick pressureit fine but I prefer trim to assist with that. Also, the weight of my trim systemis 1.45 lbs. acceptable to me, not excessive by any means! .... including the plywood bottom? anyway, watch your CG, the Piet even with aModel-A and water filled Radiator up front comes out with and aft CG closes tothe limit.--------Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Fri, 09 Sep 2011 15:24:38 -0400
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Re: Pietenpol-List: Kennedy Space Center Flyovers

Post by matronics »

Original Posted By: Gerry Holland
Thanks you for your input, much appreciated. I used a wood 1/8 bottom for an inspection access and tail strength (assurance).KMH Sent from my iPhoneOn Sep 9, 2011, at 2:06 PM, "womenfly2" wrote:> > >> No- there is no extra weight behind the CG. Everything is to plans with thetrim system (aluminum) installed due to my weight 280lbs. Holding stick pressureit fine but I prefer trim to assist with that. Also, the weight of my trimsystem is 1.45 lbs. acceptable to me, not excessive by any means! > > > .... including the plywood bottom? anyway, watch your CG, the Piet even witha Model-A and water filled Radiator up front comes out with and aft CG closesto the limit.> > --------> > > > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 825#351825> > > > > > > > > > ________________________________________________________________________________Subject: Re: Pietenpol-List: Kennedy Space Center Flyovers
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Post by matronics »

Original Posted By: Dan Yocum
Ben Hi from England.What a positive that is to fly over Kennedy SC. Almost seems like an enlightened decision by someone.I only hope our fashion here to copy the US extends to this liberal approach to aviation. I'm sure it wont based on present conditions.The Airspace being grabbed for the 2012 Olympics in London is crazy. Enough or I'll be ranting.Great Photo. Thank you.GerryGerry Hollandgholland@content-stream.co.uk+44 (0)7808 402404White Ox Mead, Bath. England________________________________________________________________________________Date: Fri, 09 Sep 2011 16:06:58 -0500
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RE: Pietenpol-List: Shock Cord

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I use 1/2". It's a real bear to stretch it into place, but anything lessfeels very wimpy when taxiing.Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
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Re: Pietenpol-List: Shock Cord

Post by matronics »

Original Posted By: bender
Hi Jeff,Like Jack, I also used 1/2". I concur that it is a real bear to stretch, but necessary. Douwe Blumberg told me about these mega-jumbo plastic "wire ties" that are sold at Home Depot in the heating and air conditioning department (by the duct work). There is a special tool that they also sell to tighten them. I used that tool to cinch the bungees together. Ideally, one would need three men and a boy to help with this bungee-stretching operation. I have done it alone, by first looping and attaching one end to the axle by itself, then stretching and lacing, then finishing by using that aforementioned tool to fasten the tail end. Very difficult without the extra help to be sure. Dan HelsperPuryear, TN-----Original Message-----
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Pietenpol-List: Shock Cord

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Original Posted By: johnwoods(at)westnet.com.au
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RE: Pietenpol-List: Kennedy Space Center Flyovers

Post by matronics »

Original Posted By:> Ben Charvet
Ben,Very cool picture. Made me think the Piet and Space Shuttle have somethingin common, they both glide like a brick.Skip> [Original Message]
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Re: Pietenpol-List: Shock Cord

Post by matronics »

Original Posted By: "Jack Phillips"
Hi I agree with Jack completely. Stretching the bungees is a 2 person job. Practice stretching and leave the beer for after you are done.Dick N.----- Original Message -----
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Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: "Don Emch"
=0A=0A-watch your CG, the Piet even with a =0AModel-A and water filled Radiator up front comes out with and aft CG closes to =0Athe limit.=0A=0AThis is not always true.-NX929DH is nose-heavy, have to input nose-up bungee trim to fly level. I also adjusted down the LE of the horizontal stab to help raise the nose.=0A=0A=0A-=0A=0A=0A*Pilot weight: 150 Lbs.=0A=0A=0A*Model A, Gleaner Combine "diamond" block (8 lbs heavier)=0A=0A=0A*Brass radiator=0A=0A=0A*Vertical cabanes=0A=0A=0A*Jenny gear=0A=0A=0A-=0A=0A=0AWalt Bowe (Calif.) told me that his is nose heavy also.=0A=0A=0A-=0A=0A=0ADan Helsper=0A=0A=0APuryear, TN=========================0A=0A=0A________________________________________________________________________________Subject: Pietenpol-List: Re: Shock Cord
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RE: Pietenpol-List: Shock Cord

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I used to use those plastic cable ties on my bungees, but broke enough ofthem to seek an alternative. Now I use .041" stainless steel safety wire,which works very well, biting down into the bungee well enough to holdsecurely. I still use at least 3 safety wires in case one of them breaks.Jack PhillipsNX899JPSmith Mountain Lake, Virginia _____
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Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: "bender"
A come-along, bloody fingers, and cussing are all requirements of the bungee operationfor me. I had to go to 5/8" and wrap really really tight. Good Luck!Don EmchNX899DERead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Shock Cord
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Post by matronics »

Original Posted By: Doug Dever
I kinda thought this would be the answer....i looked at the kitfox list and saw the use of a smaller size but longer lengths.....more wraps....seems that more wraps of easier to deal with cord would serve the same purpose..i've been looking at all the flying and glider manuals too... for thoughts at thattime..thanks gentlemanjeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sat, 10 Sep 2011 08:32:51 -0700 (PDT)
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Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: Jim Markle
Yes Gene...With the steel tube gear it really is a much different comparison. The nice thing about the straight axle is you can add some more wraps if needed.With my gear that is difficult to do, not much room. The next Pietenpol Ibuild (Ha Ha) is going to have the straight axle.Don EmchNX899DERead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sat, 10 Sep 2011 11:43:39 -0500 (GMT-05:00)
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Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: "bubbleboy"
Subject: Pietenpol-List: Re: Control hornsI sprayed zinc chromate inside and sloshed it around....followed by my welder at work welding the metal tab on the piece. He was shockedand amazed when the internal zinc chromate caught on fire and starting spewingnoxious gas at him.I learned about welding/painting sequence from that one.--------Kevin "Axel" PurteeNX899KPAustin/Georgetown, TXRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Shock Cord
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Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: "bubbleboy"
Really?Sent from my iPhoneOn Sep 16, 2011, at 8:05 PM, "kevinpurtee" wrote:> > I sprayed zinc chromate inside and sloshed it around....> > followed by my welder at work welding the metal tab on the piece. He was shockedand amazed when the internal zinc chromate caught on fire and starting spewingnoxious gas at him.> > I learned about welding/painting sequence from that one.> > --------> Kevin "Axel" Purtee> NX899KP> Austin/Georgetown, TX> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 491#352491> > > > > > > > > > ________________________________________________________________________________Subject: Pietenpol-List: Re: Shock Cord
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Post by matronics »

Original Posted By: "Jack Phillips"
While on the subject of bungee chord, I have a mate who is ordering a pile of itso im going to buy mine now. Im building the straight axle and am wonderingwhat approx length the chords need to be?Thank you in advance.Scotty--------Tamworth, AustraliaBuilding a Corvair Powered Pietenpol Air Camperwww.scottyspietenpol.comRudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvairengine at Roy's Garage waiting to be modified.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
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RE: Pietenpol-List: Re: Shock Cord

Post by matronics »

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I always order 20 feet of 1/2" bungee. You actually need about 6-7 feet perside, but you need enough of a "handle" to be able to tension it. 20 feetworks out about right.Jack PhillipsNX899JPSmith Mountain Lake, Virginia -----Original Message-----
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Post by matronics »

Original Posted By: "Gary Boothe"
Thank you Jack! Much appreciated.Scotty--------Tamworth, AustraliaBuilding a Corvair Powered Pietenpol Air Camperwww.scottyspietenpol.comRudder, Vert stab, Elevators, Hor Stab and Ribs built...About to start fuselage...Corvairengine at Roy's Garage waiting to be modified.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
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Re: Pietenpol-List: Re: Shock Cord

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Original Posted By: helspersew(at)aol.com
Grass roots fly-in and a nice grass strip just east of Cincinnati this coming Sunday,Sept 25. Free lunch!http://www.eaa174.org/#SWORFI--------David Gallagher601 XL/Jabiru 3300First flight 7/24/08, Upgraded 3/19/10Flew it to Oshkosh '09 & '10180+ hours and climbing!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Re: Shock Cord
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