T-Rex 450xl head speed
Kevin
aiming at ? I have just brought my first tacho
--
Kevin R
Reply address works
Beav
"Kevin" <donte...@ntlworld.com> wrote in message
news:1LiOj.18146$B83....@newsfe3-gui.ntli.net...
> any idea what head speed for normal hovering and circuits I should be
> aiming at ? I have just brought my first tacho
A minimum 1800rpm I'd say, but 2000 would be even better.
--
Beav
VN 750
Zed 1000
OMF# 19
Kevin
> On Sun, 20 Apr 2008 16:26:21 GMT, "Beav"
> <beavis....@ntlwoxorld.com> wrote:
>
>> "Kevin" <donte...@ntlworld.com> wrote in message
>> news:1LiOj.18146$B83....@newsfe3-gui.ntli.net...
>>> any idea what head speed for normal hovering and circuits I should be
>>> aiming at ? I have just brought my first tacho
>> A minimum 1800rpm I'd say, but 2000 would be even better.
>
> 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
Kevin
> 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
>
> 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
Steve R.
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.
Mike @ zen
"The OTHER Kevin in San Diego" <skiddz "AT" adelphia "DOT" net> wrote in
message news:jfjp0419fkff01ggr...@4ax.com...
> On Sat, 19 Apr 2008 09:15:41 GMT, Kevin <donte...@ntlworld.com>
> wrote:
>
>>any idea what head speed for normal hovering and circuits I should be
>>aiming at ? I have just brought my first tacho
>
>
> The TR is a bit soft so lack or RPM on the big fan translates to lack
> of RPM on the little one...
>
> I run all my 450s at 3000 on the head. You can run woodies, but make
> sure they're balanced VERY well and replace if if they have any
> contact with anything but air.. Thankfully, I crash often enough I
> don't have to worry about a set failing due to fatigue. :)
Try this :-)
http://www.modelavionics.com/skytach.asp
Kevin
> wrote:
>
>
>> none of my buddies will get anywhere near me in the hover :-) I would
>> not try the same trick with a 30 powered bird
>
>
thats a novel idea not sure you could tach when doing 3d though
Steve R.
Believe it or not, yes you can. If the model has a half way decent setup,
and the rpms aren't shifting all over the place, you should be able to get a
pretty close reading. We've done it many times!
Kevin
alone look through a view finder
Steve R.
Yeah, well, I was referring to the kind of 3D flying us "mortal" types are
likely to do! :-) I've successfully tached a friend of mine through kaos',
tick-tocks, stationary flips, and other such nonsense. It was no big deal.
As for the guys you're referring to? I just watch the show from a
"descreet" distance! ;-)
Fly Safe,
Steve R.
Kevin
just looks totally out of control , I like the more graceful moves
Steve R.
Couldn't agree with you more! :-D
Beav
"Steve R." <srho...@comcast.net> wrote in message
news:cNKdnWgFTtq1bpLV...@comcast.com...
> "Kevin" <donte...@ntlworld.com> wrote in message
> news:70tPj.61733$Ff4....@newsfe5-win.ntli.net...
>> The OTHER Kevin in San Diego wrote:
>>> On Mon, 21 Apr 2008 18:31:42 GMT, Kevin <donte...@ntlworld.com>
>>> 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
I've got a heli stand so I can stand under the heli while it's revving its
bollocks off. A nice YS 90 powered Futura revved to the max with every
degree of pitch used from -12 to +12 and everything in between makes a
wonderful droning noise y'know. VERY nice!.
It's good to be able to fart about with those mixture screws while the
heli's trying like fuck to fly away, coz then you know the engine is NEVER
going to bog down when it's flying.
Trouble is, when the shit hits the fan (and it has) there isn't a whole lot
left of the heli and that's if you can find the parts that escape:-)
Beav
I don't even bother watching that type of flying anymore Steve.