Brodhead Pietenpol Association

Original Posted By: Gary Gower

Original Posted By: Fisherman Caye
what's the current thinking on corvair engines in Piets. I've been offthe list for several months. Mark McKellar Mt. Pleasant Tx.________________________________________________________________________________Date: 5 Feb 2002 06:11:51 -0800

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ray,I think you've got them reversed. The Altimeter should have one hole, witha 1/8" Pipe Thread, which should be connected to your static pressure port.Or it can be left open, but will not read as accurately that way. TheAirspeed Indicator (called a speedometer on a car or a boat, but not on aplane. You wouldn't call a boat tiller a steering stick would you?) shouldhave two ports (both should be threaded with a 1/8" pipe thread) and markedP and S. The P port should be connected to your Pitot tube and the S portshould be connected to your static pressure port (it can be tied into theline from the altimeter - the pressure doesn't care how many instruments areconnected to it), or like the altimeter it can be left open, but it will bereading cockpit static pressure, which is probably not going to agree withthe true static pressure.If you don't already have them I strongly suggest you buy at least two ofTony Bingelis' books, if not all four. You really need "The SportplaneBuilder" and Sportplane Construction Techniques". They are available fromthe EAA and are absolutely the most important books you can own if you arebuilding a plane. In there are several chapters on how to hook up theinstruments, along with information that you are going to need on how tomake metal fittings, and aligning the fuselage and landing gear, and brakes,etc., etc. Those books are the Bible for homebuilding.Jack -----Original Message-----

Original Posted By: Michael D Cuy
________________________________________________________________________________Date: Tue, 05 Feb 2002 12:02:39 -0500

Original Posted By:> "Mark"
I laughed when I read this and said "oh no". I sure this will start anotherheated engine discussion (no pun intended).Never tried one, but for some reason, I like 'em. Actually, I like anyengine you can direct drive, get some HP at 2000 rpm, doesn't weigh toomuch, and the prop won't rip the crank out of the block.Robert Haines

Original Posted By: Fisherman Caye

Original Posted By: Fisherman Caye

Original Posted By: Fisherman Caye

Original Posted By: "Warren D. Shoun"
Boy you ask a simple question of the search engine about pitot tubes andthere is all kinds of physics and theory. But nary, one lousy photograph ofa metal pitot tube and connecting hoses. If what one guy said is right in theory on here today. I should be ableto read the altimeter with no attachments to the hole in the guage on mypanel? Since the Pietenpol is an open cockpit, it should read theairpressure right? Or altitude, sorry! Or do I find a plastic plug anddrill a needle sized hole for that hole in the middle of the back that youscrew something in? The air speed guage is different though, I am guessing. Not sure what hesaid? There is an output and a static. You do what with which? There aretwo hose like connectors on the back. Like you use for a fuel line and fuelfilter ( those small one in VW bugs. ) He said plug one and leave the otheropen, or something along those lines? Don't you need one of those bentright angle tubes I see sticking out under a wing? Fisherman CayeOK Ray, I'll give my two cents worth. Yes you will have to have a pitottube (unless you use a vane type of airspeed indicator like the old E-2 Cubsused). You can leave the static ports of the airspeed indicator and thealtimeter open if you wish. However, they will not be seeing the truestatic pressure. They will be reading the pressure inside your cockpitwhich is probably less than true static pressure because an open cockpittends to create a slight vacuum, sucking air out of the cockpit. If theinstruments are reading the cockpit pressure, the airspeed indicator willread higher than you are actually flying, and the altimeter will also read ahigher altitude than you are actually flying. There will also tend to bevariations due to side-slipping and other maneuvers. Not a real problem ifyou're not a real stickler for accuracy, although I would want to have analtimeter that reads accurately if I was flying underneath some Class Cairspace without a transponder.To do it right, there are a couple of ways to approach it. The simplest wayis to use a Pitot-Static tube, or a pitot tube with a static tube close by.You can find these in any of several aircraft parts company catalogs, likeAircraft Spruce & Specialty (their catalog is free and is a treasure troveof information - for example their catalog shows how to hook up theinstruments you are asking about right now. They are on the web atwww.aircraftspruce.com. ) or Wag Aero or Wicks Aircraft Supply. You mightas well get all their catalogs now because there is a lot of stuff requiredto build a plane that you just can't get at Home Depot.Most production airplanes use a pair of static ports located somewhere alongthe fuselage, one on either side. This is a better setup, but more troubleto install. The reason it is better is that if the plane is skidding orslipping the two ports average out the static pressure better than a singleport can. My Cessna 140 uses a static port inside the left wing, just apiece of tubing flattened slightly on the end but still open and leftdangling in space between the front spar and the leading edge. The point isthat you want a static source that will remain fairly constant with changesin aircraft attitude.You can make your own Pitot tube and static tube. The Tony Bingelis books Imentioned earlier, and Mike Cuy seconded, tell how to do it. Buy or borrowthose books and most of your questions will be answered. They are enjoyablereading, too.Jack________________________________________________________________________________Date: Tue, 05 Feb 2002 17:04:09 -0800

Original Posted By: nanapapa2000
No offense to that gentleman, but you'd do well to avoid anything coming from the Aeromax group. Hit up the Corvaircraft group archives:http://www.maddyhome.com/corvairsrch/frame/index.jspand search for Aeromax, give it a read.RyanOn Tue, Mar 8, 2011 at 2:09 PM, Charles Campbell wrote:------ Original Message -----

Original Posted By: nanapapa2000
No offense to that gentleman, but you'd do well to avoid anything coming from the Aeromax group. Hit up the Corvaircraft group archives: http://www.maddyhome.com/corvairsrch/frame/index.jsp and search for Aeromax, give it a read. Ryan On Tue, Mar 8, 2011 at 2:09 PM, Charles Campbell wrote: ----- Original Message -----

Original Posted By: nanapapa2000
----- Original Message -----

Original Posted By: KM Heide CPO/FAAOP

Original Posted By: Ryan Mueller
Subject: Re: Pietenpol-List: Fw: corvair engine

Original Posted By: shad bell
I know that if I go the Corvair route I will stick with WW. I've had his book and all his videos for a while now. Don't know anything about Aeromax. ----- Original Message -----

Original Posted By: Rick Holland
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________________________________________________________________________________Date: Wed, 9 Mar 2011 10:31:06 -0700Subject: Re: Pietenpol-List: Fw: corvair engine