Brodhead Pietenpol Association

Original Posted By: "Michael D Cuy"
Speaking of carb heat. I've had a problem with my engine going dead when Ipull carb heat for several weeks. That is, during normal run-up (1500 RPM),I switch to left mag, then right mag. All's fine and normal with 50-75 RPMdrop. Reach up and over the throttle, grab the carb heat and pull - -engine drops to idle and nearly quits before I recover by pushing in carbheat. I checked everything. The heat box is fine, SCAT tubing fine, damperin the airbox works fine.... What's going on here? I asked 3 different A&Ps and they scratched their heads, too. Figured itout today - so simple it's embarrasing. But it shows how easy it is tofixate on something and miss the easy answer.Anybody want to guess what it turned out to be?Bert----- Original Message -----

Original Posted By: "Bert Conoly"
Were you bumping the throttle, Bert?----- Original Message -----

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Hmmm, interesting. You reach UP and OVER the throttle cable...how close arethey to each other? TOO close? Cables rubbing? Shirt sleeve hanging onthe throttle cable?What's happening to the air getting to the carb when the damper moves?I would LOVE to get my hands on it and see for myself!I for one have GOT to know what's up!!! :-)Maybe an offline answer so I can sleep tonite?????:-)Jim Markle Senior Sales EngineerArt Technology Group - ATG:jim(at)atg.com*+1.469.371.0669'+1.972.447.8330 -----Original Message-----

Original Posted By: Jim Cooper

Original Posted By: alexms1(at)comcast.net
Pulling the Mixture knob?>From: "Bert Conoly" >Reply-To: pietenpol-list(at)matronics.com>To: >Subject: Re: Pietenpol-List: Carb heat w/ 65 Continentals - Mystery Solved.>Date: Mon, 29 Nov 2004 20:25:44 -0500>>>Speaking of carb heat. I've had a problem with my engine going dead when I>pull carb heat for several weeks. That is, during normal run-up (1500 >RPM),>I switch to left mag, then right mag. All's fine and normal with 50-75 >RPM>drop. Reach up and over the throttle, grab the carb heat and pull - ->engine drops to idle and nearly quits before I recover by pushing in carb>heat. I checked everything. The heat box is fine, SCAT tubing fine, >damper>in the airbox works fine.... What's going on here?>> I asked 3 different A&Ps and they scratched their heads, too. Figured >it>out today - so simple it's embarrasing. But it shows how easy it is to>fixate on something and miss the easy answer.>>Anybody want to guess what it turned out to be?>>Bert>>>----- Original Message ----->From: "Michael D Cuy" >To: >Sent: Monday, November 29, 2004 10:51 AM>Subject: Pietenpol-List: Carb heat w/ 65 Continentals>>>> >> > Corky & Group-- A small item of BIG importance that some omit in the >carb> > heat setup on Champ-type stacks> > is a sheet metal triangle that is fixed in between the "Y" of the >exhaust> > stacks prior to the heat muff being installed.> > This triangle of metal forces the fresh air (from a scoop fixed to the>side> > of the muff) around the stacks and increases> > the 'travel time' of the air to make sure the temp. is up where you need> > it. A tab or three can be welded to the stacks> > to hold this triangle in place. Would not have known this had I not >done> > annuals w/ my partner on our old Champ.> > I asked Joe what the plate/triangle was for and he explained.> >> > Jack-- many thanks are being given here for your safe return to mother> > earth and a repairable Pietenpol.> >> > Also I'm having concerns now about my big idea to keep the axle from> > turning under braking action. I know my axle is> > the same wall thickness as Frank Pavliga's Sky Gypsy as I pirated as >much> > info/ideas from him as possible.....and it's a very> > thick wall. My guess is approximately 0.20-0.25" thick.> >> > Mike C.> >> >> >> >> >> >> >> >> >>>________________________________________________________________________________

Original Posted By: N321TX(at)wmconnect.com
Subject: Re: Pietenpol-List: Carb heat w/ 65 Continentals - Mystery Solved.Are you running Mogas or 100LL?________________________________________________________________________________

Original Posted By: Jim Cooper

Original Posted By: "Bert Conoly"
How about a mouse nest in the heat muff?walt evansNX140DL----- Original Message -----

Original Posted By:
Don't think it's an AirCamper. Gear attaches much too forward. And don'tthink that "hole" is a front seat ,,,It's got cross bracing on both sidesand the front. Kind of hard to get into.This is from seeing only one pic of the front.walt evansNX140DL----- Original Message -----

Original Posted By: N321TX(at)wmconnect.com
Bike-Mike and Markle guessed right....Thanks for the e-mails.....Had several great guesses. All were very unusual butplausible. Interconnections between the throttle and carb heat cables, kinksin the SCAT tube, obstruction in the air box, improperly rigged cables, varmitsin the heat muff,. pulling the wrong knob (mixture), ...The problem was simply that as I reached up and over the throttle, I would grabthe carb heat knob with index and middle finger. When I pulled backward, mywrist would gently pull the throttle back. And it would drop back to idle. Iwould quickly push in the carb heat and it "came back" But actually it neverwent anywhere - other than to idle.I was so fixated on what the carb heat was doing to the engine, that I never feltthe throttle moving.Moral to the story....Try not to fixate on a problem. there's a reason for everything. Just think theseproblems through and logically figure them out.Bert (whose inspection is in 3 weeks- after 9 1/2 years building. Cross yer fingers!))----- Original Message -----

Original Posted By:
Looks like the placement for the fuel cell>Doug & Elizabeth BlackburnYucaipa Californiawww.inlandsloperebels.comW W's Conversion Manual 3202, 5782www.flycorvair.com----- Original Message -----

Original Posted By: del magsam

Original Posted By:> "Bert Conoly"
Bert,I like the confused cables going to the mixture answer. But, you probablydon't have a mixture control so I will go with a clogged filter of somesort.Ted