[NSRCA-discussion] Hyde type C mount?

[Jerry Budd]

Hi Ed,

They're not listed on the Central Hobbies web site (at least as of 
last weekend) but I'm sure they will be soon.  They're shown on 
Central Hobbies back cover ad in the latest K-Factor at around $60. 
The ad states the mounts have several of the features my mounts do 
such as standardized mounting dimensions, pre-drilled motor 
attachment holes, replaceable aluminum mounting rails, and a light 
weight of around 3 oz (for the version that requires a nose ring, the 
non-nose ring version weighs somewhat more).

Isn't it amazing what a little bit of competition will do to the market?  :-)

Anyway, what I'd be careful about is that the ad only claims a 35% 
reduction in transmitted vibration (it's unclear what the reference 
point is, one can only assume compared to a hard mounted motor). 
Anyway, that's not very good, and in some cases it could excite a 
structural resonance frequency of the airframe and actually amplify 
the transmitted vibration.  I don't think in most cases it will, but 
as the stiffness of a soft mount approaches that of a rigid mount, 
the question becomes, " what is the point of using a soft mount if it 
doesn't filter out the unwanted vibration?".

There's some other claims in the ad that IMHO I don't think are 
accurate (or defendable), but that's a topic of discussion for 
another time, and maybe a different forum.

FWIW - For those who have been very patiently waiting, I'm in the 
process of procuring some prototypes of the nose ring support for my 
soft motor mounts for proof testing.  I'd like to think I'll have 
them available within a month or two but I won't know for sure until 
the testing is completed (hopefully soon - this has taken way too 
long!).

Thx, Jerry


>I apologize if this is repeat topic, but someone mentioned recently 
>that Hyde had a new, cheaper, non-nose ring  mount (type C?). 
>Someting like $70 at Central? I don't see it on their website 
>though.  Do I have this right?
>
>Thanks
>Ed

-- 
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Jerry Budd
Budd Engineering
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