RCU Forums - View Single Post - OS FS 30 to 91 which Engine?
Thread: OS FS 30 to 91 which Engine?
View Single Post
Old 10-27-2008 | 12:54 PM
  #1  
snoopy5
Member
 
Joined: Mar 2007
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
From: glenrothes, UNITED KINGDOM
Default OS FS 30 to 91 which Engine?
Hi guys

I am a newbee to 4 strokes any help would be much appreciated, here is my question.

The OS FS 30 rpm is 2500 to 13000 weight 279g
The OS FS 54 rmp is 2200 to 12000 weight 419.6g
The OS FS 70 rmp is 2300 to 12000 weight 467g
The OS FS 91 rmp is 2000 to 12000 weight 742.8g

I am looking to put the 91 in my piper cub but looking at the other engines the rpm's are the same but weight wise obviously there is a difference. For rpm's which would you guys recommend. The weights mentioned are not an issue.

Much appreciated and many thanks (cant decide which one to go for)
snoopy5 is offline  
Reply Like