I don,t know about wooden propellers but a metal prop can run into a bad harmonic vibration if not match to an engine I'm building a KR-2s I'm planning on putting a wooden prop on it also and Ill be checking on proper indexing on it. My understanding of propellers is that the wood props don't have the same problems that metal props do however I'm not going to leave that to chance. Who ever made your prop should have that information . The friend of mine that had the problem had been flying his airplane for quite a long time also and noticed a strange vibration and landed trying to figure it out that when he found the crack he called the manufacture and they did some testing with sensors on the same prop and said it had been cut to the worst length for that engine prop combination Jim ----- Original Message ----- From: "Kenneth Wiltrout" <kwiltrout1...@verizon.net> To: "KRnet" <kr...@mylist.net> Sent: Thursday, November 24, 2005 7:42 AM Subject: Re: KR> Prop position on C 90
> Hi Guys------------Just signed back on the net after a year or so, I'm > sure this was talked about but do wooden props need to be indexed as well? > I've been flying N6399U for 5 years now and never heard anything about > indexing before. > > Jim <aerobe...@cox.net> wrote:I don't know the position however call a > engine shop and they will know . > I would not fly in a airplane that didn't have the propeller properly > indexed I know of one instance of an airplane that had a propeller cut to > the wrong length and the prop developed a crack 17" from the tip he was > very > lucky to have been able to get the airplane on the ground . Do yourself a > favor and don"t give it a whirl untill you have the prop properly indexed. > > ----- Original Message ----- > From: "L. D. Mueller" > To: > Sent: Wednesday, November 23, 2005 8:57 AM > Subject: KR> Prop position on C 90 > > >> Hey everyone: does anyone know at what position a metal prop should be >> relative to cylinder number and stroke? I have an overhauled prop >> reinstalled on a C 90 that has a little vibration @2200. The prop is true >> and tracks right on. It didn't have this vibration before. So I think I >> need >> to reposition it. Anyone want to give it a whirl? ; - ) >> >> >> >> Thanks >> >> >> >> L. D. Mueller >> >> 521 North Madison St. >> >> Cuba City, WI 53807 >> >> >> >> _______________________________________ >> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >> please see other KRnet info at http://www.krnet.org/info.html > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
