[NSRCA-discussion] Hyde type C mount?

[Ed Alt]

Thanks Jerry.  I'm looking for inexpensive alternatives for a friend getting 
into Pattern and the C mount sounded like it could do the trick.  I think I 
will try to guide him to an A type (it's going in a FOCUS II).

Ed
----- Original Message ----- 
From: "Jerry Budd" <jerry at buddengineering.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Thursday, February 09, 2006 12:27 AM
Subject: Re: [NSRCA-discussion] Hyde type C mount?


> 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
>
> -- 
> ___________
> Jerry Budd
> Budd Engineering
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