Go Back  RCU Forums > RC Airplanes > Crash & Rebuild
Reload this Page >

My Extra 300

Notices
Crash & Rebuild Post your crash stories, pictures and if you want to document your rebuild you can do that here too!

My Extra 300

Old 04-06-2022, 06:43 AM
  #1  
Dave Yoder
Junior Member
Thread Starter
 
Join Date: Jan 2022
Posts: 22
Likes: 0
Received 3 Likes on 3 Posts
Default My Extra 300

So I bought an ARF Extra 300 and I was pleasantly surprised at the quality of the plane. All wood construction with beautiful covering. It was a .48 size nitro powered plane, so I put a .61 2-stroke on it to be sure it performed as good as it looked. Now I am a novice flyer, so I'm a little apprehensive about flying this fast plane. Maiden flight was going well at about half throttle when I decided to open her up. Full throttle, high-speed fly-by and something went horribly wrong. I heard a terrible buzz and lost elevator. She went into the woods like a missile. After forensics I noticed most of the teeth on the elevator servo were gone. The buzzing that I heard was the elevator flapping as the long composite push rod flexed. I contacted the manufacturer, explained what had happened, and they sent me a new plane. I relocated that elevator servo about 4" from the tail with a short rigid steel push-rod, adjusted the C.G. All good now.
Old 04-06-2022, 01:42 PM
  #2  
Outrider6
Senior Member
My Feedback: (2)
 
Join Date: Apr 2020
Location: Metro Atlanta GA, USA
Posts: 189
Likes: 0
Received 15 Likes on 14 Posts
Default

Yep - flutter can and will destroy some components real fast. Now you know that the next time you hear that sound, you should reduce throttle immediately, land, find the cause and fix it before you fly again.

Is a .61 2-stroke larger than the recommended engine size? If so, you are very fortunate that the manufacturer replaced it, on their dime. Care to share who makes the plane?
Old 04-08-2022, 02:07 AM
  #3  
Dave Yoder
Junior Member
Thread Starter
 
Join Date: Jan 2022
Posts: 22
Likes: 0
Received 3 Likes on 3 Posts
Default

Actually I think the .61 was at the top of the recommended engine sizes. It was a Graupner model, similar to this pic. except Patty Wagstaff was the pilot figure.

Graupner

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.