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Pietenpol-List: Elevator control trim

Posted: Wed Jun 13, 2012 3:44 am
by matronics
Original Posted By: "Peter W Johnson"
Since I can't sleep tonight thinking about my build, I want to ask a question regardingtrim on the elevator controls. I have seen Mike Cuy's treatment on theelevator trim, and have planned to imitate it (best form of flattery Mike!).I thought I'd ask if there were other forms of trim being used by you pieters,and if there are pics anywhere. I am at the point of building my seat and pilot's'perch' so I want to plan out the trim arrangement. I am going to buy therest of the Bingalis books soon, so if there is a good reference on this inone of them, point me in the right direction coach!Thanks!Mark________________________________________________________________________________

RE: Pietenpol-List: Elevator control trim

Posted: Wed Jun 13, 2012 6:22 am
by matronics
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Mark,This is what I did. Cockpit end http://www.cpc-world.com/new_card_image ... PG.jpgBell crank end http://www.cpc-world.com/images/IMG_1102_JPG.jpgHope that helps.PeterWonthaggi Australiahttp://www.cpc-world.com-----Original Message-----

Pietenpol-List: Re: Elevator control trim

Posted: Wed Jun 13, 2012 7:18 am
by matronics
Original Posted By: "Douwe Blumberg"
MarkMy Piet originally had a push/pull cable operating a trim tab on the elevator.The problem was constantly having to adjust the trim in flight due to drift inthe cable. The solution was to bust off the plastic knob and add threads to attacha turnbuckle which works absolutely flawless and allows for very small adjustmentswhich comes in handy if you have a header fuel tank.--------Adrian MWinnipeg, MBCanadaRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/dsc0 ... __________

Pietenpol-List: Re: Elevator control trim

Posted: Mon Sep 30, 2013 8:53 pm
by matronics
Original Posted By: "Fun2av8"
I am leaning more towards a the Scott 3200 Tail Wheel (Tube and Tire) as I havea spare in the hangar from my Maule. I've only recently got back into flyingmy Piet and I've noticed that the itty bitty Piet tail wheel really odd anglewith 600 size tires. I am thinking that adding the Scott 3200 tail wheel will(1) give me better steering control in grass as well as on pavement, and (2)will reduce this the angle of the fuse when on the ground. Looks like a fewfolks have gone with the Scott 2000 tail wheel (solid rubber). It looks to bea couple inches larger.Has anyone gone to the larger tail wheel? Those of you in the know, do you knowof an adverse reason for using the larger tail wheel. Thanks--------Jim McWhorterN687MB (New Owner)Culpeper, VA KCJRRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/scot ... ___Subject: Pietenpol-List: Re: Elevator control trim

Pietenpol-List: Re: Elevator control trim

Posted: Mon Sep 30, 2013 11:30 pm
by matronics
Original Posted By: "taildrags"
Jim;A couple of observations on the solid 6" Scott vs. the pneumatic 8" tailwheel.First, weight. Most Piets tend to be tail-heavy, and according to the AircraftSpruce shipping weights, there is more than a 2 lb difference between the 2000and the 3200. That's a lot. Second, aircraft angle in the 3-point attitude.The Piet's FC10 airfoil can still be producing lift with 5.00 or 6.00 mainsand a big tailwheel. The original configuration is with a tailskid, whichput the tail down lower. The people who are flying with spoked wheels and a tailskidprobably have the plane nearer to a full-stall in the 3-point attitudethan airplanes like mine, and that gives you the slowest landing speed and theshortest landing roll. Lastly, you should try taxiing a Piet with the 6" solidScott on grass or pavement. It will turn on a dime. Matter of fact, I havethought of changing the spring tension on the tailwheel on mine to reduce thesensitivity just a bit, although I do like to have the ability to make it goprecisely where I want it to go. Now I'll wait to hear from those who may beusing the larger tailwheel to see if I've missed an even better deal than Ihave with the solid 6".--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Elevator control trim

Posted: Mon Sep 30, 2013 11:41 pm
by matronics
Original Posted By: George Abernathy
Wow. Peter's setup is absolutely gorgeous! Nice work, and professional. Mine,by contrast, is stone-age crude. I have a bungee cord that applies biasingforce to the bellcrank on the walking beam. I made it adjustable, but have neveradjusted it because it never needed adjusting. Except it's been in placefor five years now and the bungee has all but lost its tension, so it's time toreplace the bungee. Here are some pix:http://www.flysquirrel.net/piets/trim.htmlSince Scout has a 16 gallon nose tank, I'll never be able to trim it just rightwith the stone-age setup that I have. After I gas up, I need to hold a touchof back stick for awhile. As the fuel burns off, it starts to go neutral. Withlow fuel, I'm holding just a touch of forward stick. With Peter's setup,I could just nudge the trim wheel and I could keep the altimeter needle perfectlyon my cruise altitude, but with my Fred Flintstone setup, I have to keep lookingat the altimeter and reminding myself to hold back pressure on the stick.No... wait... was that forward pressure? I don't remember... let me lookat the fuel indicator (which is a bent wire sticking up out of the fuel fillercap out on the nose!)--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 1 Oct 2013 02:21:29 -0700 (PDT)

Re: Pietenpol-List: Re: Elevator control trim

Posted: Tue Oct 01, 2013 11:10 am
by matronics
Original Posted By: Rick Holland
I've looked for pictures but couldn't find any to show how the 1/2" spruce supportswere attached to the ribs. I understand the other end is attached to thespars but am not certain how to mount the support to the rib? Thanks,--------John FrancisRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/dsc0 ... ______Date: Tue, 1 Oct 2013 10:18:25 -0600Subject: Re: Pietenpol-List: Re: Elevator control trim

Re: Pietenpol-List: End Rib Support

Posted: Tue Oct 01, 2013 11:27 am
by matronics
Original Posted By: Rick Holland
Subject: Re: Pietenpol-List: End Rib Support