The Ghost

The Tap and Die arrived this morning, always get a set. Tapped out the adaptor and fitted, the engine is down around 100rpm at WOT, but is very quite, muffler and pipe from a ASP180FS. Will get the tubing from Christian's and try it again.

Cheers

The Ghost

Hi All,
The rain stopped long enough to run the engine and test it on smoke. Running just over 6000rpm. Will have to set up the smoke pump now and test again.

Cheers
https://www.youtube.com/watch?v=K8tV6hTKdLc&feature=youtu.be

tyor

smoke is fun. Do you just use the nipple on the muffeler for the smoke?

The Ghost

Yes, just used the nipple already fitted to the muffler

Cheers

tyor

thats nice. I thought the nipple had to be closer to the sylinder.

What kind of smoke oil do you use?

discus-fly

Can someone please confirm that I need a 10mm plug spanner to fit the CM6 spark plug.

The Ghost

I am using Supa Dri smoke oil in the video.
Cheers

The Ghost

You will need a 14mm thin walled deep socket for the plug spanner.

Cheers

ALFIEV

Nice to see this site is still active and the NGH GF38 is still gaining new owners! I hope you have sucess with your projects. The NGH still powers my ESM 74" Corsair and has been flown over recent weeks. The engine hasn't missed a beat, has enough power for my model, and it is only certain weaknesses in the airframe (fibreglass inner wing) that has kept me from flying this more often.
Enjoy!

discus-fly

AW if you do intend to build the Flair Tiger then would suggest a few mods are required.

Found today that the GF-38 is too long for the space available under the cowl, hence a recess apatature was required in the rear firewall.

Wound suggest perhapse moving the firewall at least 10mm towards the tail.

Also the engine bearers are far too close together to match the GF-38.

Otherwise she does fit as can be seen from the attached.

AlphaWhisky

The Ghost,

Thanks for your PM with standoff picture details. Unfortunately I lost that PM and detail when trying to download it. Any chance you could send that pic to my email address.

Thanks

Alan W

AlphaWhisky

discus-fly,

You`re miles ahead of me with the Tigermoth. Mine will be an O/D - I now have plans to the stage I can build from them, but will hold off until a couple of other projects are cleared.

At least the test-rig is ready for a bench run - still waiting for the ignition unit to arrive and also stand-offs.

Alan W

The Ghost

Alan,
PM sent
Cheers

AlphaWhisky

Andrew,

PM received and actioned. I hope to have a set made within next few days.

Thanks,

Alan W

The Ghost

Alan,
Glad I could help.
Cheers

slopflyer

I need you guys help.
I have a WorldModel GS Zero 180(Wingspan: 2M ; Weight: 7.5 ~ 8.5kg). And I am considering NGH GF38 for her power.
It will give enough power for GS Zero to scale flying?

tyor

I think the gf38 will be a perfect match for the zero. I have it on the ESM aihi d3a1 val, that is 205cm wingspan and ca 8kg.

you can se it here with a master 16x10 3-blade prop.
https://www.youtube.com/watch?v=4OHXPzCsR3Q

discus-fly

Given that the GF38 carb is now partly buried in the fire wall of my tiger moth, wondering about the possibility of turning the whole carb assembly through 180 degrees to allow better access to the jet adjustments. Has anyone done this before?

The Ghost

Hi,
You won't be able to rotate the carby as the porting for the pump in the carby won't line up, you would need to make an adaptor plate with new porting for it to work.

Cheers

slopflyer

Thank you very much! Tyor.

DoctorG

Hi Guys
New to this thread - just picked it up on search engine as I am have a mare of a day with a new NGH FG38 bought from HobbyKing. When it first arrived I quickly mounted it in a test stand and got it to fire up in idle. It did that easily on an electric starter. As the prop I had was a tadge small and a tadge damaged(!) I dismounted and put it away to mount in the airframe.

Now in the airframe (1/4 scale Stampe - not that this is relevant) and it will not get above 3000 rpm on full throttle. 19x8 wooden AGM prop 20:1 fully synth mix.

Running is not smooth or reliable at that level either. Will idle at 1700 rpm or so but again not at all reliable. I have tried adjusting the needles a la standard Walbro setting up with little affect. Hi end needle seems very sensitive. It has had 30-40 minutes of intermittent running so I would have thought I should be seeing some stability in settings by now even if not fully bedded in.

My next port of call would be the timing but earlier posts here leave me confused. I would have set it to 28-30°TDC but it seems that it may require 40°. Before I start down that path I would appreciate any informed input.

My experience with gas is less than glow but I have run a number of bog-standard 26cc size 2 strokes and I currently running an ASP120 gas conversion (which is really sweet) that I a set up from scratch. So I am surprised I can't get this baby working.

Thanks in antcipation

tyor

Hi
I bet it is your ignition battery. if you have the ignition that says 4.8-8.4v you have to use 6v or more to get it to run nice. one of mine engines behaved like yours when I used 4.8v

DoctorG

Nice thought but I am running on a 2s lipo. However on first test I was on a 4 cell nicd so I will look into it. Voltage may be too high. Cheers

DoctorG

Well here's interesting.....have stripped the engine out of the model and mounted back into the test stand. Following Tyor's post I went back to the 4 cell nicd battery I used first time (plus I couldn't be bothered to liberate the lipo from the model) and hey presto it runs like a good 'un!

6500 rpm top end rock solid (same 19x8 AGM prop). Low end I can't get below 3000 rpm at the moment without it cutting when the throttle is blipped but that may come good with some more running in/tweaking.

Not what I was expecting at all - but I am mighty relieved.

The only other possible variable is that I found the Woodruff key had dropped out and I had to go searching for it. There is the outside chance I lost it before I put the engine in the model and just happened to lock the prop driver in approximately the right position but still out on the timing. I think this is unlikely however.

I will now set it up inverted as per the model and then change to a lipo ignition pack and see where that takes me.

I love mysteries when I am solving them - otherwise they are a pain in the backside!

discus-fly

Little of thread but has anyone tried the NGH GT09. Thinking of putting it in a Flair Puppeteer.

Also fitted the GF38 to the airframe and now stuck how to configure the throttle and choke. Wondering of the merits of installing the throttle servo directly in the engine bay.