Forum

Notifications
Clear all

This Forum is a place for Piper Comanche pilots to communicate and discuss technical issues

If you join or reset a password, please check your Spam Email box for emails from Admin at ComancheTechTalk.com

Please put your questions on the forum as well so everyone can read and respond. Someone else might be having similar questions.

All questions or topics on the Forums automatically get sent to the Tech team as well.

motor mounts

1 Posts
1 Users
0 Reactions
47 Views
Admin
Joined: 5 years ago
Posts: 1162
Topic starter  

motor mounts

Postby pa24-250 » Sat Aug 30, 2008 7:30 pm

Which motor mounts are suppose to take all viberation out caused by a 3 blade prop?
Kevin
pa24-250
ICS member
ICS member
 
Posts: 19
Joined: Thu Jun 19, 2008 12:46 am

motor mounts

Postby Don Nelson » Sat Aug 30, 2008 11:34 pm

Which 3-Blade Prop, Kevin?

Don't know what Hartzell does, but McCauley normally supplies 4 new Lord J-3804-41 mounts, or at least they did with the prop supplied for my 250 last year.

Except that they mistakenly supplied one J-3804-42 set, that turns out to have a gel surrounded spacer. Tho at first denied, it seems that a few installations, like mine, had excessive movement on engine startup and/or shut down, allowing the metal mount spacer to bang on the engine mount.

In my case I learned about that from Lord, who eventually supplied me with additional gel spacers when McCauley wouldn't - although McCauley supplied the paperwork necessary for the Field Approval to use those spacers.

Having said all that, I should add that most McCauley 3 blade installations are fine with the softer Lord mounts supplied with the propellor kit.

Hope this helps.
Best, Don

User avatar
Don Nelson
ICS member
ICS member
 
Posts: 312
Joined: Mon Nov 10, 2003 5:57 pm
Location: Burlington, Washington; KBVS

 

Postby N3322G » Sat Aug 30, 2008 11:49 pm

You might consider dynamic balancing as well.

Pat Keefer ICS 08899

User avatar
N3322G
ICS member
ICS member
 
Posts: 1911
Joined: Thu May 08, 2008 1:58 pm
Location: Fort Worth, Texas area

 

Postby pa24-250 » Thu Sep 11, 2008 8:18 pm

 
pa24-250
ICS member
ICS member
 
Posts: 19
Joined: Thu Jun 19, 2008 12:46 am

   
Quote
Share: