flyrotary@lancaironline.net Mailing List Archive

Message

Rusty,

I had my old engine/psru balanced while attending the MEmphis rotary flyin several years ago. The guy said the "sweet spot" to put the extra weight would wander a bit (presumably because of the gearlash??) and it did take him a bit longer as he tried the weight in a couple of different positions. But, he succeeded and reduced the vibration a noticable amount.

I am going to try to get this one balanced before heading for Charlies flyin at the end of the month.

Ed A

----- Original Message -----

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Saturday, May 14, 2005 10:56 PM

Subject: [FlyRotary] Prop balancing?

Greetings,

There's an A&P at my airport that does prop balancing, and he just did a friends RV-7 this morning. When he was done, I asked him to do mine. He hooked everything up, got an rpm reading, but when he tried to actually take a measurement, it would only say "error". We tried it several times, and it wouldn't work, so no balancing for me :-(

The instrument was a Chadwick Vibrex http://www.e-equipments.co.uk/vibrex2000.htm and it sure looks like it should work. The question I have is whether it can cope with a gear drive.

Has anyone had their prop balance by the same folks that do Lycosaurs? Did the instrument work for you?

Thanks,

Rusty

PS- Get your engine balanced David, so you won't be wondering if that vibration is the prop, or the engine. I sure wish I had balanced my engine, because now I just don't know.