Thorp Air Command - T18.net

Supporting Owners, Builders and Pilots of the Thorp T-18 and its variants.
It is currently Fri Jul 19, 2024 4:40 am

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
peterjaypriest
PostPosted: Thu Jun 13, 2024 10:59 pm 
Jr. Member
Jr. Member
User avatar

Joined: Tue May 18, 2021 1:21 pm
Posts: 75
Images: 0
Location: Elk Grove, CA
So,

I'm going to have my C/S prop dynamically balanced this weekend. I understand the basic process.

My question for those that have done it on their T18s, is, does the top cowl need to be removed for mounting of the sensor? And, if so, is it okay to run up the engine multiple times without the top cowl in place?

My concern is that the lower cowl is not well supported in this scenario, and could possibly interfere with the back of the rotating spinner. (not good!)

What has been your experience in the mechanics of the process?

Thanks!

Peter


Top
 Profile Personal album  
 
fytrplt
PostPosted: Fri Jun 14, 2024 1:09 am 
Hero Member
Hero Member
User avatar

Joined: Tue Oct 20, 2009 8:07 pm
Posts: 1145
Images: 2
Location: Lakeland, Florida, USA
You will probably have to take the whole cowl off. Tie the tail wheel down good. I tie mine to my truck wheel. You will not be able to hold the plane with brakes at the RPM you will need for a good balance job.

_________________
Bob Highley
N711SH
SN 835
KLAL


Top
 Profile Personal album  
 
peterjaypriest
PostPosted: Fri Jun 14, 2024 10:02 am 
Jr. Member
Jr. Member
User avatar

Joined: Tue May 18, 2021 1:21 pm
Posts: 75
Images: 0
Location: Elk Grove, CA
Thanks Bob,

That's the heads-up that I needed. I'll remove all of the cowling.... And will tie the tailwheel to my truck!

Peter


Top
 Profile Personal album  
 
Ryan Allen
PostPosted: Sat Jun 15, 2024 1:49 pm 
Hero Member
Hero Member
User avatar

Joined: Wed Oct 21, 2009 6:10 pm
Posts: 1111
Images: 0
Location: Louisiana
I agree, I was afraid to balance my prop with only the bottom cowl installed, so removed all the cowling.


Top
 Profile Personal album  
 
peterjaypriest
PostPosted: Sun Jun 16, 2024 12:50 am 
Jr. Member
Jr. Member
User avatar

Joined: Tue May 18, 2021 1:21 pm
Posts: 75
Images: 0
Location: Elk Grove, CA
To close this out...

I removed all of the cowling, chalked, and tied the tail spring to my truck.

After a few runups to 2350 rpm (my typical cruise rpm,) with varying amounts of weight added, the balance went from .68 to .36 to .06 ips. I guess that's an improvement.

Buttoned it back up and flew it briefly- it does seem smoother. Hope that's not some placebo effect!

Looking forward to flying it a LOT this summer!

Thanks guys!

Peter


Top
 Profile Personal album  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

[ Time : 0.095s | 13 Queries | GZIP : On ]