RCU Forums - View Single Post - Replacement engine for an ST 91
View Single Post
Old 04-02-2026 | 06:21 PM
  #4  
speedracerntrixie's Avatar
speedracerntrixie
My Feedback: (29)
 
Joined: Jun 2010
Posts: 9,713
Received 204 Likes on 175 Posts
From: Happy Valley, Oregon
Default

The OS 61 FX loves the APC 13x6 prop. The blades look a bit narrow but the prop pulls well. Running 15% nitro with help too. Shouldn’t have any issues flying an airplane up to 9 lbs.