Pietenpol-List: newbie type question - flutter

matronics · Post by **matronics** » Mon Aug 04, 2003 6:53 am

Original Posted By: "TWINBOOM"
There doesn't seem to be any type of balance to the Piet's aileron system.Has anyone ever heard of or experienced problems with flutter?Thanks,Bob B. - Missouri________________________________________________________________________________

matronics · Post by **matronics** » Mon Aug 04, 2003 7:58 am

Original Posted By: "baileys"
----- Original Message -----

matronics · Post by **matronics** » Mon Aug 04, 2003 8:15 am

Original Posted By: Mike
I researched for a month on the subject of brazing 4130 and found nothing in writing that stated it shouldn't or couldn't be done. I finally broke down and ordered the welding book that I was told it was in. I don't have the book with me here at work but there is one sentence in it that states that it can split the grain of the 4130 as it cools. Seems to be one mans theory and there are no structural parts in a Piet that call for brazing anyway. My guess is there are lots of Piets out there that have been flying safely for years with brazed 4130 parts in them. I'll get the name and author of the book this evening unless someone beats me to it. I think the guys name is Ron Merchado or something like that. I made up some brazed 4130 test pieces and was satisfied that they are as strong as any other brazes that I have done in the past 35 years. Maybe if the metal is heated more than necessary the brazing would have a different affect on the metal but that's not the way I braze so I didn't try it. Ed G.>From: Carbarvo(at)aol.com>Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list(at)matronics.com>Subject: Re: Pietenpol-List: Brodhead impressions from a newbie>Date: Thu, 31 Jul 2003 15:05:19 EDT>>>Can anyone cite chapter and verse about why there are recommendations >against>brazing 4130? I'm not questioning the truth of it, I'm just trying to cure >my>ignorance. This is the second time I've heard this. After the first time, I>went to the best professional welder I know and he couldn't provide any>background.>>________________________________________________________________________________Date: Mon, 04 Aug 2003 07:24:50 -0700Subject: Re: Pietenpol-List: newbie type question - flutter

matronics · Post by **matronics** » Mon Aug 04, 2003 10:23 am

Original Posted By: Michael D Cuy

matronics · Post by **matronics** » Mon Aug 04, 2003 5:11 pm

Original Posted By: owner-pietenpol-list-server(at)matronics.com
It's hard to flutter when you can't outrun a butterflyJack -----Original Message-----

matronics · Post by **matronics** » Mon Aug 04, 2003 7:09 pm

Original Posted By: Jim Ash

matronics · Post by **matronics** » Mon Aug 04, 2003 9:19 pm

Original Posted By: "Jack Phillips"
Fellow Piete builder and flyers,We had a chapter member experience flutter at 80 MPH in his Kit Fox and helost his flaparons (sp.) He safely landed the aircraft with only rudder andelevator and a passenger aboard. Just because we will not be able to flyfast does not exclude any of us from the possibility of flutter.Just my opinion.Alex Sloan----- Original Message -----

matronics · Post by **matronics** » Tue Aug 05, 2003 12:39 am

Original Posted By: Mike
Subject: Re: Pietenpol-List: newbie type question - flutter

matronics · Post by **matronics** » Tue Aug 05, 2003 11:18 am

Original Posted By: BARNSTMR(at)aol.com

matronics · Post by **matronics** » Tue Aug 05, 2003 11:20 am

Original Posted By: "Mike"
Flutter-----One of the aileronflaparons was completely ripped off of the Kit Fox and theother broke loose at the outer hinge and was hanging on the inner hingebanging against the fuselage. He said it happened in the twinkle of an eye.He was very upset with who ever was responsible for the design as supposedlythere was a fix for this but it never got out to all the Kit Fox buildersand he was one who never got the information till after the fact.Alex Sloan----- Original Message -----

Brodhead Pietenpol Association