Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Dead Weston Magnum

Reply

Old 11-12-2005, 02:51 PM
  #1  
jon_focal_plane
Member
Thread Starter
 
Join Date: Apr 2005
Location: Tucson, AZ
Posts: 72
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Dead Weston Magnum

Maiden flight of Magnum with brand new Jett 60LX was over in 20 seconds. Had just throttled back and trimmed the ailerons when the wing separated from the fuselage. The wing fluttered down and was completely unharmed. Inspection revealed the single dowel pin was missing and a nice clean hole where the dowel once resided. The fuselage wasn't as fortunate. It became a lawn dart. Had enough time to kill the engine before impact. From the rear wing attachment area forward was obliterated. The Jett integral spinner was shredded, don't know whether the crank was bent or not yet. Will probably ship it back to Dub for evaluation. It was running so doggone good too!

I don't know who I'm more irritated with, myself for not recognizing the crappy dowel assembly, or Weston for designing such a crappy dowel assembly. I looked at it several times during assembly and even considered adding two more dowels but decided against breaking into the wing. That was a mistake. I thought I had gotten some CA around the dowel but obviously not enough. Weston should just leave the thing unglued and let the user glue it in during assembly. Then I'd know it was done properly. For what is advertised as a 200mph plane, I'd say that's a major flaw. Let the Buyer Beware!

Jonathan
jon_focal_plane is offline  
Reply With Quote
Old 11-12-2005, 03:22 PM
  #2  
rmenke
Senior Member
My Feedback: (13)
 
Join Date: Jun 2004
Location: Merced, Ca., CA
Posts: 2,118
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

Jon-Focal-Plane

Thanks so much for the tip. Have been considering buying one of these things, but have not learned if they will turn a pylon or not. Think the thing is out of consideration now due to your point and lack of landing gear. We have a asphalt strip that is very rough, only alternative to land in the dirt and I hate dirt plus oil.
rmenke is offline  
Reply With Quote
Old 11-12-2005, 08:30 PM
  #3  
bob27s
My Feedback: (19)
 
bob27s's Avatar
 
Join Date: Apr 2002
Location: Cleveland, OH
Posts: 5,576
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

crud....!!

sorry to hear about that. I really hate that helpless feeling.....

The engine is likely fine. Other than the spinner you lost, the only thing that can bend is the prop stud - that takes just a few seconds to replace. That is why the engine is designed that way No bent cranks.
bob27s is offline  
Reply With Quote
Old 11-13-2005, 12:13 AM
  #4  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

You got a dud... mine held up fine for over a year... including a "nose first landing" after my aileron servo quit on me.

I did have to CA the dowel hole in "F2" though , because the light ply was giving in over time.
Rudeboy is offline  
Reply With Quote
Old 11-13-2005, 12:36 PM
  #5  
Crazy4Flight
My Feedback: (540)
 
Crazy4Flight's Avatar
 
Join Date: Sep 2002
Location: Milford, MI
Posts: 3,014
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

I would use epoxie on the wing/dowel joint. The CA is not good for a foam core wing.

I once had a Topcat with foam cored tail fin booms. Previous owner used CA on it, and after it flipped on a crosswind take off, the booms folded like paper. No foam left inside just air!

Remember: ARF = Almost Ready to Fix
Crazy4Flight is offline  
Reply With Quote
Old 11-13-2005, 06:30 PM
  #6  
Mike Connor
Senior Member
My Feedback: (5)
 
Mike Connor's Avatar
 
Join Date: Jan 2002
Location: Tulsa, OK
Posts: 2,025
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum


ORIGINAL: jon_focal_plane

Maiden flight of Magnum with brand new Jett 60LX was over in 20 seconds. Jonathan
Sorry you lost your plane but I bet the Jett is fine. I hope you will post a review of the 60 LX when you get it in another plane.
Mike Connor is offline  
Reply With Quote
Old 11-13-2005, 09:08 PM
  #7  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum


ORIGINAL: Crazy4Flight

I would use epoxie on the wing/dowel joint. The CA is not good for a foam core wing.



Remember: ARF = Almost Ready to Fix
The dowel on a Magnum does not sit in the foam core... it sits in the structure below the wing...

But yes, the solvents in CA (acetone) will eat most (if not all) foam wing cores for breakfast.
Rudeboy is offline  
Reply With Quote
Old 11-13-2005, 10:01 PM
  #8  
jon_focal_plane
Member
Thread Starter
 
Join Date: Apr 2005
Location: Tucson, AZ
Posts: 72
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

Yeah, like RB said, the dowel lies below the foam area in a built up box below the wing. I've built kits with foam cores and know the consequences of bringing standard CA into contact with foam.

jon_focal_plane is offline  
Reply With Quote
Old 11-13-2005, 10:08 PM
  #9  
jon_focal_plane
Member
Thread Starter
 
Join Date: Apr 2005
Location: Tucson, AZ
Posts: 72
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

ORIGINAL: Mike Connor


ORIGINAL: jon_focal_plane

Maiden flight of Magnum with brand new Jett 60LX was over in 20 seconds. Jonathan
Sorry you lost your plane but I bet the Jett is fine. I hope you will post a review of the 60 LX when you get it in another plane.

I'll definately give feedback on this engine. I have 6 Jett motors now: 3 90 LX's, a 46 FIRE with full wave pipe, a 50 side exhaust/black pipe and the ill fated 60LX. That 60 was absolutely sick on the bench (sick in the good sense). It will definitely be going into another fast air frame, just not sure what that will be now.
jon_focal_plane is offline  
Reply With Quote
Old 11-13-2005, 10:20 PM
  #10  
jon_focal_plane
Member
Thread Starter
 
Join Date: Apr 2005
Location: Tucson, AZ
Posts: 72
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

ORIGINAL: bob27s

crud....!!

sorry to hear about that. I really hate that helpless feeling.....

The engine is likely fine. Other than the spinner you lost, the only thing that can bend is the prop stud - that takes just a few seconds to replace. That is why the engine is designed that way No bent cranks.
I think the front bearing may have been damaged. If I rotate the bearing while applying gentle pressure toward the engine (anti thrust), I can feel it clicking in certain locations. Also, one of the bolts holding the muffler didn't break but instead broke a portion of the threaded area on the muffler. I have it completely disassembled now and that is the only damage I can detect. I can't check the runnout on the crank with my setup. Your experience is that the cranks don't bend?
jon_focal_plane is offline  
Reply With Quote
Old 11-14-2005, 08:21 AM
  #11  
bob27s
My Feedback: (19)
 
bob27s's Avatar
 
Join Date: Apr 2002
Location: Cleveland, OH
Posts: 5,576
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

yeah ... if you bend the crankshaft, you had to bend the crankcase too

Send it back to dub... he can fix all the little stuff and replace the bearing.
bob27s is offline  
Reply With Quote
Old 11-15-2005, 10:18 AM
  #12  
jon_focal_plane
Member
Thread Starter
 
Join Date: Apr 2005
Location: Tucson, AZ
Posts: 72
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum

So, when I get the motor back from Dub, what should I put it in? The objective here, in keeping with the forum, is extreme speed.

Jonathan
jon_focal_plane is offline  
Reply With Quote
Old 11-15-2005, 10:30 AM
  #13  
Mike Connor
Senior Member
My Feedback: (5)
 
Mike Connor's Avatar
 
Join Date: Jan 2002
Location: Tulsa, OK
Posts: 2,025
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum


ORIGINAL: jon_focal_plane

So, when I get the motor back from Dub, what should I put it in? The objective here, in keeping with the forum, is extreme speed.

Jonathan
I would go with a clipped wing dust but a Q-500 wouldn't be too bad either.
Mike Connor is offline  
Reply With Quote
Old 11-15-2005, 10:56 AM
  #14  
bob27s
My Feedback: (19)
 
bob27s's Avatar
 
Join Date: Apr 2002
Location: Cleveland, OH
Posts: 5,576
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Dead Weston Magnum


ORIGINAL: jon_focal_plane

So, when I get the motor back from Dub, what should I put it in? The objective here, in keeping with the forum, is extreme speed.

Jonathan
I have not flown one yet, but take a look at one of these.......
http://www.schwingrc.com/sweep16links.htm

Of note, Dub is pretty loaded up right now. delivery on new engines and repairs are running 4 weeks or so.

Bob
bob27s is offline  
Reply With Quote

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