RunRyder RC Helicopter Topic - 231PUH RPM ?

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Gasser Model RC Helicopters > 231PUH RPM ?

Fixit
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Location: UK

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Quote
Yes absolutely, looking forward to hear if that helps sorting out the problem.

I certainly hope this works, fingers crossed

Quote
It`s allways interresting when people make there own conversions, and we can all learn alot from that.

Well I certainly have learned not to do another for a while

I only like to fly gassed up

11-03-2009 02:29 PM

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j.8
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Location: Denmark

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Regards Bo

11-03-2009 02:31 PM

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Fixit
Elite Veteran
Location: UK

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Some Video at last
Modifying the baseplate cured the carb problem

As you can see it still needs work but at least it’s flying.

http://www.youtube.com/user/K3Gamin...u/1/iR0R9SONDPQ

I only like to fly gassed up

11-07-2009 05:41 PM

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Fixit
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Location: UK

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I'm still a bit confused as to why the plug still looks lean on the muffler side any clues? both needles are set at 1 5/8 and the mix is still 40:1.I’ve reset the governor and it now gets to the target head speed before hover unlike the video but I’m still not sure about the plug

I only like to fly gassed up

11-09-2009 04:36 PM

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j.8
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Location: Denmark

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Hi Fixit

One thing about the reading a sparkplug, if you
land the heli and throttle down, before killing
the engien, then the rpm`s are down to the "rich"
idel setting, and that can quickly give the darkest
look, that half the plug has. Maybe inflight, the
plug has the same colour on both halfs. The best way
to read a plug, is flying, engien kill, autorotation.

Maybe the engien is a little hot, due to gearing, head speed,
and the flying style on the video.
I mean that the head speed might be a little to low, and
that the flying style is overloading the engien.

But I would say, as long as there are no burnmarks on
the top of the piston, and only a layer of oil that can be
removed with a cotten stick, so that you can se pure alu colour,
your engien is not to hot.

But is it nice to se that your are getting things sortet out.

Regards bo

11-09-2009 06:53 PM

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Fixit
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Location: UK

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J.8
I know what your saying about cutting the engine and autoing down but it’s a DX7 so no throttle cut and secondly it will auto but like a brick

You would expect the engine to be hot but it isn’t, I haven’t taken any readings with this one but when I land and hold my finger on the crankcase just under the carb I can hold it on indefinitely. I havant had the head off as that would be a big job but I do keep checking the exhaust port and the piston is still as new.
The next move is to fit smaller blades and bring the RPM up a bit and see if that runs any better, I also plan to make carbon frames for it now I’m happy how everything fits so that should get the weight down.

PS, I wont be doing any aggressive flying like the moves in the video it will be more like timid hover

but I’ve built it so I want to see it fly at its best to settle my hormones

I only like to fly gassed up

11-09-2009 10:01 PM

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Richardmid1
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Location: Leeds, England

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You can just turn your throttle hold setting down so the engine cuts when you hit throttle hold, ill do it at the weekend. Secondly I dont think more headspeed is the answer as 2000 is more than enough! 680-690 blades will help along with increasing the gear ratio. Also get that carbon sheet off Phil for the base plate and use a 2000mah 2s li-po instead of the Ni-mh and generator.

Eden George born 10/03/08, future 3D Masters winner!

11-10-2009 10:39 AM

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Fixit
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Location: UK

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You can just turn your throttle hold setting down so the engine cuts when you hit throttle hold, ill do it at the weekend.

the last time I did that I was told to change it buy a club member

I don’t have Phil's number for the carbon

And I would like to keep the generator for now anyway.
I won’t have the 680 blades for a while so no rush.
Thanks for the Video.

I only like to fly gassed up

11-10-2009 11:17 AM

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Richardmid1
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Location: Leeds, England

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Ive still not seen the new ones yet, what do I search for on youtube?

Eden George born 10/03/08, future 3D Masters winner!

11-10-2009 11:24 AM

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AceBird
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Location: Utica, NY USA

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1 5/8 seems way rich to me but I didn't see a lot of smoke in the video. If it is rich on the low end it could explain the increase in RPM initially on take off. It will surely explain the black / white plug.

refreshing my memory: This is a stock 231 PUH with 710 blades? On my other posts I was thinking it was a 20EI.

Ace
What could be more fun?

11-10-2009 02:31 PM

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j.8
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Location: Denmark

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Hi Fixit

Quote
I havant had the head off as that would be a big job but I do keep checking the exhaust port and the piston is still as new

If you want to check the top of the piston, it`s enough to
remove the sparkplug, and turn the crank till the piston
is at the top point.

Regards Bo

11-10-2009 03:55 PM

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Fixit
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Location: UK

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Ive still not seen the new ones yet, what do I search for on youtube?

Richard click on the link before the park plugs then you will see his other video’s to the right.

I only like to fly gassed up

11-10-2009 05:06 PM

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Fixit
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Location: UK

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This is a stock 231 PUH with 710 blades? On my other posts I was thinking it was a 20EI.

Yes Ace it is the sandard 231 PUH with 710 blades

I only like to fly gassed up

11-10-2009 05:08 PM

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Fixit
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Location: UK

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If you want to check the top of the piston, it`s enough to remove the sparkplug, and turn the crank till the piston is at the top point.

I can’t see a thing that way with or without my glasses; I need to get a small bright torch

I only like to fly gassed up

11-10-2009 05:10 PM

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AceBird
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Location: Utica, NY USA

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Yes Ace it is the sandard 231 PUH with 710 blades

Well I would say you should be able to run 1800-1900 Headspeed with little bogging if you gear for 11,000 on the engine. Trying to push the blades to 2000 on a standard engine is asking a lot for those blades.

I am happy doing 1650 with my Preddy which turns the engine about 10,000. It is easier to keep the shakes down if you are not turning so much.

Ace
What could be more fun?

11-10-2009 05:31 PM

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kogibankole
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Location: albuquerque

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The zenoah manual says to run the heli engines between 9000-10000 at full throttle.

if im not blade bogging youll find me pack puffing

11-11-2009 01:35 PM

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j.8
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Location: Denmark

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Hi Fixit

Quote

Quote
--------------------------------------------------------------------------------

If you want to check the top of the piston, it`s enough to
remove the sparkplug, and turn the crank till the piston
is at the top point.
--------------------------------------------------------------------------------

I can’t see a thing that way with or without my glasses; I need to get a small bright torch

This is what I use

http://www.niteize.com/category.php?category_id=28

Regards Bo

11-11-2009 02:49 PM

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pgkevet
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Location: surrey UK

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..shame you're not closer.. got all sorts of fancy video endoscopes

pgk

11-11-2009 04:12 PM

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Fixit
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Location: UK

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..shame you're not closer.. got all sorts of fancy video endoscopes

Now that would be cool and would make a change from me having them stuffed up every orifice

I only like to fly gassed up

11-11-2009 04:52 PM

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Fixit
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Location: UK

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This is what I use

j.8
I removed the muffler and wound the crank so the piston crown is level with the port I can see the piston top and use a cotton bud on it but it is black with carbon, its not a build up and I think if I wet the bud with petrol it would clean up, still need to buy a light to be sure.

I only like to fly gassed up

11-11-2009 04:58 PM

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