Re: T-Rex 450xl head speed

"Kevin" <dontemailme@[EMAIL PROTECTED]
> wrote in message 
news:70tPj.61733$Ff4.6012@[EMAIL PROTECTED]
> The OTHER Kevin in San Diego wrote:
>> On Mon, 21 Apr 2008 18:31:42 GMT, Kevin <dontemailme@[EMAIL PROTECTED]
>
>> wrote:
>>
>>
>>>> WAY too slow for a 450 bird Beav.  It'll fly, but it'll be very very
>>>> sluggish and I'd be amazed if the tail held with the pitch needed to
>>>> get it airborse at that RPM.
>>> well I am running around 2100 if I hold the helicopter and measure, I 
>>> will need to find a way to strap the tacho to get a proper in the
hover 
>>> reading and you are right it is sluggish but controllable
>>
>> IMO never a good idea to strap a heli down and run it up...  Get a
>> buddy to tach while you hover.
>>
>>
>>
> none of my buddies will get anywhere near me in the hover :-) I would
not 
> try the same trick with a 30 powered bird
>
> -- 
> Kevin R
> Reply address works


I've seen models that were strapped down to a table go into some
significant 
harmonics with "not good" results!  :-o

You may be getting away with it with a 450 size bird but I have to agree 
with Kevin on this one, you're asking for it!  ;-)

As for the tach, the versions that Miniature Aircraft sells work very well

and  you don't need to be that close to the model to use them.  The only 
downside is, they're not cheap, but they are very good!

FWIW!  :-)

Fly Safe,
Steve R.