Thread Tools
Jan 25, 2013, 01:25 PM
Registered User's Avatar

500E Fuselarge with 450 Pro

Aware a lot has been written on this topic but thought ity may be worth posting my experience re the Hughes 500 fuselage from HK.

Vibration is the problem with the stock configuration of ply mounts

Spent all last week trying soft mounts but have now given up this approach.

Possible solution is to stop the fuselarge vibrating in the first place using stiffening structure.

As can been seen from the pictures serval items of Depron have been glued in which does have a definite damping affect when the outer skin is struck.

Ply mounts have also been replaced by balsa.
Sign up now
to remove ads between posts
Jan 25, 2013, 02:16 PM
Love my scale Whirlybirds
Keyrigger's Avatar
There was a funny story about fuselage dampening. One fellow was having some difficulty with body vibrations setting up and creating harmonics that wanted to put the heli in self-destruct mode. At some point his daughter put one of her stuffed toys in the rear of the heli (MD500, I am fairly sure of that) so that Daddy could give it a ride. Naturally the vibrations were not there this time and he was mystified as to the reason until he either had a good look inside or his daughter asked for her stuffed toy back out of the heli. THAT was funny, but what it did show is that with careful planning, (or dumb luck), some dampening material can be added to stop the body from buzzing as it is spooled up. I have some foam that I might just stuff in the back of my MD500 and if it spools up nicely, I'll just leave it there. Take care.

Jan 26, 2013, 10:33 AM
Registered User
+1 one on that keyrigger,thats how I solved the resonance problem in my md500 A litle foam in the right place do's wonders. Ed
Jan 26, 2013, 11:45 AM
Registered User's Avatar
Pinging the outside of the fuselage still resulted in some resonance so more foam added.

Qick flight test showed I still have a tail vibration but only during spool up.

Thinking I now need to stiffen the tail support or possibly attach it to the fuselarge.
Jan 26, 2013, 12:09 PM
Love my scale Whirlybirds
Keyrigger's Avatar
Leave the tail held in place only by the foam donut. Balance your tail and check linkages on the tail for worn or loose links. If you solid mount the tail you will think that the heli will shake itself to pieces. Take care.

Jan 27, 2013, 09:44 AM
Registered User's Avatar
Could well be right Don. Not at all sure what to do about the tail. Will park that problem.

Discovered on inspecting the head that I had a lot of play on the pitch settings. First thought it was just a lose blade camps but on closer insepection found that the plastic in the swash plate had worn so that the top assembly of the swash had horizontal play.

Have now replaced the swash plate but have liitle confidence in the assembly as the blade clamps do move slightly on the feathering shaft. Tempted to replace the entire head.

Is there a fix for lose blade grips? Have tried new bearings but they are not a tight fit at all and seem to allow a small movement on the feathering shaft.
Jan 27, 2013, 10:48 AM
Registered User's Avatar
Head re-assembled yet again! This time feels a lot better, so will now install it yet again into the fuselage.
At least on the 450 pro I donít have the hassle of dismantling the rear pulley as all this in-out would be a major pain.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold TrEx 500E $380.00 C-ME-FLY Aircraft - Electric - Helis (FS/W) 8 Feb 12, 2013 06:20 PM
Off Site ALIGN DS520 Digital Servo HSD52001 TREX 450 Pro 3GX 500E PRO helifreak592 Aircraft - Electric - Helis (FS/W) 0 Sep 14, 2012 05:24 PM
For Sale Trex 450 pro super combo bnf 500e body stingywho182 Aircraft - Electric - Helis (FS/W) 7 Mar 21, 2012 01:26 PM
Poll Trex 500E or 450 Pro 3GX johnnympc Electric Heli Talk 10 Feb 03, 2012 09:40 PM