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Old 07-31-2004 | 02:21 AM
  #6  
Troy Newman
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From: Goodyear, AZ
Default RE: Piedmont motor mount question?

If it doesn't do much for vibration damping then what is the point?

Hard mount it...its lighter cheaper and you get the same results.

My Father-in-law has this mount on a Focus built by Dave Guerin. My advice to him was to hard mount the Webra 145 and just live with the vibration. This setup has a funny resonant frequency thing going on in his model.

If your question is will hold the motor in the model then I guess its a success as a motor mount. My personal opinion is that just because it flew the model and the motor didn't depart the airframe doesn't make it a good motor mount. I expect better from my equipment that that.
If you question is does it do anything for vibration then I have to say NO my experience is it makes it worse.

Just some quick numbers...I have one of those Hangar 9 current meters...Plugs in-line with the battery pack and will tell the current being drawn from the battery for the entire RC system. This then assumes that current draw is a good way to measure vibration levels. I won't argue that fact but I feel it is part of the indication of how hard the servo are working to hold center.

All the setups draw about 150-170ma when the radio is on and no engine running.

YS 160DZ on a Hyde AR type mount (5digital servos) 500ma draw at full power

Webra 145 MC carb on the well nut mount shown (same 5 digital servos)...1150ma draw at full throttle. Also a funny harmonic will draw almost 2000ma at about 1/3 power....considering the model only has a 1400ma nicad pack in it I don't like the idea of this harmonic.

By the way the same Webra 145 on a Hyde AR mount reads in the 500-600ma range at full power on a similar model and setup as the above Focus with the well nut mount.

Not to mention the constant vibration repair work that must be done to maintain the model...Belly cover screws, cowl and its screws, as well as eating servo pots and gears like candy. Clevis links...I actually saw Rocket city linkages wear out in short order.

As many know I'm a big supporter of Merle's......The REASON is his mounts work! It is as simple as that. I have been buying Merle's mounts since about 95' and there is nothing better in my opinion. I have never seen someone have a problem with his mounts...And when somebody at a contest has a motor mount problem it is always on another type....whether its a beam style mount like the DB, or MK or its a Gator Soft and safe, and a home made version of Merle's mounts....I have tried the others and keep coming back to what works.

I hate to see people getting a wrong steer. I don't mean to argue with the guys that like it.....but I have experience with it and I would not tell anyone its worth their time.



Troy