Beginners Beginners in RC start here for help.

Engine Mounting Problem-OS FS-70 II Surpass

Reply
Old 01-12-2002, 02:37 AM
  #1
flyboy2
Thread Starter
 
Join Date: Dec 2001
Location: Richardson, TX
Posts: 51
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Engine Mounting Problem-OS FS-70 II Surpass

Plan instructions for the ARF I am currently assembling calls for a firewall-to prop distance of 4.5 inches. The rear mounted carb of the OS FS-70 II Surpass and the engine mount makes this impossible. Moving the engine as far back as possible leaves the prop too far forward about 3/16 inches. Will this have any significant impact on how my model flies? The model is a WM Rambler 45.
flyboy2 is offline  
Reply With Quote
Old 01-13-2002, 11:06 AM
  #2
EXCAP232
 
Join Date: Dec 2001
Location: Frederick, MD
Posts: 1,319
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Engine Instillation

Flyboy,
It is doubtful the 3/16 will make much difference to the flight envelope of the plane. What will make a difference is the weight of the engine as compared to what the plane was designed for. Check the balance carefully as the heavier engine may palce the center of gravity forward enough to make the elevator input "mushy" or require more elevator throw than called for in the plans. Good Luck! Bill
EXCAP232 is offline  
Reply With Quote
Old 01-13-2002, 10:39 PM
  #3
maverick
 
Join Date: Nov 2001
Location: Alameda, CA
Posts: 1,575
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Engine Mounting Problem-OS FS-70 II Surpass

As this is a World Models ARF it is probably using the same engine mount as what was in my World Models P-51.

I mounted an OS FS-70 II inverted in this plane and had to use a dremel to remove some of the engine mount cross beam to get the engine far enough back.

Both the top and bottom cross beams had mouldings for use by the front wheel on a tricycle landing gear configuration.

I just removed this part of the bottom cross beam and the engine sits back far enough now.
maverick is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 02:42 PM.