Vibration Question

For technical discussion of ALL V-Twin Motorcycle aircraft engine conversions.

Vibration Question

Postby Sean_Caranna » Fri Sep 03, 2004 9:27 pm


My only concern is vibration in the TC-88b. The rubber-mounted engine on a bike usually has less vibration at high RPM than the balanced engine. The ballanced engine being better at lower RPM. What engine rpm do you use for take-off and cruise? How would you describe the engine’s vibration at high RPM?

Sean Caranna
"I'll have what the gentleman on the floor is having."
User avatar
Posts: 231
Joined: Thu Aug 12, 2004 12:34 am
Location: Daytona Beach, FL

Postby Brett » Wed Sep 08, 2004 2:04 am

Take off RPM is between 4800 and 5200 just depending on how fast you climb. I am at about 5000 most of the time.
Cruise is anywhere from 4000 to 4400.
There is a little vibration. But very little I think it depends more on your prop as to how much. You can look at the video on the web and get an idea. That is just a camera setting in the seat. It cruises very smooth.
If your not going to try, then whats the point of talking about it?
Topic Moderator
Posts: 23
Joined: Thu Aug 19, 2004 3:23 am
Location: West Frankfort, IL

Postby shorty » Tue Dec 07, 2004 11:36 pm

I flew out to visit the guys at Ace Aircraft, saturday, and found out a few things about the Harley engine. (88-B) It runs quite smoothly throughout the operating range. (of course they want to sell me one).
But he told me a few other things that lead me to belive that, when mounted properly, there should be no problems with vibration.

User avatar
New Member
Posts: 14
Joined: Tue Dec 07, 2004 11:01 pm

Return to V-Twin Motorcycle Engine Technical Discussions