Just a couple of thoughts which I hope may help: Rule #1 for balancing anything: Check the track before you start anything. Place something on the ground and line up with the prop tip and then rotate the prop through to see that the other tip(s) are tracking the same. There may be a slight variation but anything that you can easily see means Stop and find out what's wrong. I've seen stuff like metal caught between the prop flange and crank flange which makes the blades run with different angles of attack. You can not balance an out of track prop. If it does balance out on the ground it will change during flight and be putting strain on the crank the whole time. The DynaVibe does in fact indicate the "heavy spot" on the reading according to their instructions. If there is no weight on the prop to start with add weight 180° out from the location of the reading. My background is tuning and experimentation on military helicopters for a manufacturer so if it keeps giving you proplems I'll be glad to help you create a tuning phase chart which should take some of the guesswork out.
Hope that helps, GT ________________________________ From: "kr2coo...@comcast.net" <kr2coo...@comcast.net> To: KRnet <kr...@mylist.net> Sent: Sunday, March 11, 2012 7:54 AM Subject: Re: KR> Still Balancing Engine Dan I used the Dynavibe once and if I remember correctly you have to place the balance weights 180 out according to how the accelerometer is installe d. Jack Cooper ----- Original Message ----- From: "Dan Heath" <da...@windstream.net> To: "KRnet" <kr...@mylist.net> Sent: Sunday, March 11, 2012 7:33:02 AM Subject: KR> Still Balancing Engine I spent most of today continuing the effort to balance my engine, and so far, nothing has worked. The results are nothing but confusing. I contacted Dynavibe and they told me what to do, which did clarify things, but still no results. I degreed the spinner bulkhead plate and put blind nuts every 30 degrees, thinking that would make it easier to accomplish this task, and it does, but still placing the weight does not correct the problem, only makes it worse. I am sending my documentation to Dynavibe to see if I can find out what I am doing wrong. It is really bugging me because this is supposed to be really easy. A couple of new pics showing how I set up the spinner bulkhead. http://krbuilder.org/EngineBalancingWithDynavibe/index.html See N64KR at <http://krbuilder.org/> http://KRBuilder.org - Then click on the pics See you at the 2012 - KR Gathering in Mt. Vernon, Il - MVN - 40th Anniversary There is a time for building and it is over. Daniel R. Heath - Lexington, SC http://www.krbuilder.org/MyUSA/ _______________________________________ Search the KRnet Archives at http://mylist.net/private/krnet/ 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://mylist.net/private/krnet/ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
