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NGH 38CC 4 stroke

Old 09-21-2015, 12:47 AM
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Hi,

I made adapter and fitted ASP FS-180 muffler:


Video:
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Old 09-24-2015, 05:07 PM
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Hey everyone, I'm going to be putting the 38 into a seagull spitfire and was wondering what size fuel tank everyone is using? I've read that it really sips on the gas. Do you think I could get away with a 12oz tank for a 10 min flight.

Thanks Jim
Old 09-27-2015, 10:51 AM
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Well........ I don't know the exact size of my fuel tanks, they came with the model and looked plenty big enough. Sure, it drinks fuel while running in as I run it a bit rich, but once you lean it out a bit it seems o.k on gas in my opinion.
I would think a 12 oz fuel tank would give you easy 10 minutes, but this is not a scientific proven answer!!!!!!

It also depends on throttle useage.......
Old 09-27-2015, 02:43 PM
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Originally Posted by ALFIEV
Well........ I don't know the exact size of my fuel tanks, they came with the model and looked plenty big enough. Sure, it drinks fuel while running in as I run it a bit rich, but once you lean it out a bit it seems o.k on gas in my opinion.
I would think a 12 oz fuel tank would give you easy 10 minutes, but this is not a scientific proven answer!!!!!!

It also depends on throttle useage.......
I can get over 10 minutes run time from an FA-180 running glow fuel W/CDI. Your gas engine should run at least 40% longer.
Old 09-30-2015, 12:10 AM
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Default NGH 38CC 4 stroke

I made a little adapter and fit ASP FS180 muffler. It will power my new Super Chipmunk.



Video:
https://youtu.be/-gUNrVJ2rLI
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Old 10-01-2015, 12:01 PM
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Thanks Guys 12oz it is
Old 10-01-2015, 12:16 PM
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Originally Posted by ernestino
I made a little adapter and fit ASP FS180 muffler. It will power my new Super Chipmunk.



Video:
https://youtu.be/-gUNrVJ2rLI
good looking. Has anyone come out with an aftermarket muffler that works for this engine yet?
Old 10-01-2015, 12:54 PM
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I have this one. but haven`t tried it yet.
http://www.bigplanes.nl/contents/nl/...ke-engine.html
Old 10-02-2015, 03:21 AM
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Originally Posted by tyor
I have this one. but haven`t tried it yet.
http://www.bigplanes.nl/contents/nl/...ke-engine.html
Oh yeah, been a few months since I first heard about that one. Been waiting for test results which I've never seen. Let us know how it impacts RPMs and how effective it is in reducing the decibels and what the weight of the thing really is.
Old 10-02-2015, 04:36 AM
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The thread adapter looks a lot better than the cast muffler W/the slotted flange.

I doubt that the caste flange would last very long before it broke.

The adapter opens up a whole slew of options.
Old 10-02-2015, 05:12 AM
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tried muffler now. it did not affect the rpm , but it did not affect the sound either engine was as noisy as before.
Old 10-02-2015, 05:42 AM
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With FS180 muffler the sound is somehow nicer.
I haven`t noticed any affection on RPM.
One more video:
https://youtu.be/a4pux1aEXuw
Old 10-02-2015, 07:49 AM
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With the Just Engines adaptor and ASP180 muffler mine clocked 83dBa at 7M running an HK 18*8 wood prop, but I didn't record the revs. I've got to say that Ernestino's adaptor looks like a better, sturdier design than the JE thin flanged one.
Old 10-02-2015, 10:49 AM
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Tip:
I had problems getting mine running. After a lot of fault finding I discovered that on one of the screws holding the carb together the thread was broke. The metal bracket used to attach the carb to the motor makes the screw not reaching all way through the carb. This caused air leak into the motor. No idle and no real change giving gas.
Changed to two stainless M5x50 (original is M5x40) and the motor runs fine. No air leak, tested with start gas.
M5x45 whould be sufficient but I didn't have...

Anders
Sweden
Old 10-24-2015, 08:23 AM
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I mounted my NGH 38 CC four stroke engine on a Hobby King Stick. I hope to maiden the stick in the near future.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)
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Old 10-24-2015, 11:52 AM
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Anyone know where I can get the part that holds on the carb? I just finished building the seagull spitfire and went to start it up and it wouldn't start, I discovered that it wasn't drawing fuel thats when I found that the flange was broken at the engine side.

Thanks Jim
Old 10-25-2015, 09:21 AM
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I would take it to a weld shop that does tig welding. I've seen these guys weld two beer cans together the manifold shoud be a piece of cake.
If its only a crack you could try JB weld.
good luck,
Old 10-25-2015, 10:11 AM
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I'm going to try to jb weld it. I did find a place for parts so I ordered a new one. http://www.austars-model.com/gf38_741.html I haven't heard of this place before so I'll have to see what happens.
Old 10-25-2015, 01:51 PM
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Jim, thats a good web site for NGH parts. Let us know how you make out.
Old 10-25-2015, 03:08 PM
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Originally Posted by nalby
I'm going to try to jb weld it. I did find a place for parts so I ordered a new one. http://www.austars-model.com/gf38_741.html I haven't heard of this place before so I'll have to see what happens.
Sent them an email about a product they had that I was interested in and never heard back . Unusual when your trying to give them $ . May mean something or not . Cheers the pope
Old 10-25-2015, 04:31 PM
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Originally Posted by the pope
Sent them an email about a product they had that I was interested in and never heard back . Unusual when your trying to give them $ . May mean something or not . Cheers the pope
I have tried contacting them many times. I never got a reply. Even tried phoning, but no answer. I gave up and went with professional companies who want to deal with customers.
Old 10-26-2015, 04:40 AM
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Originally Posted by Heli-NuBee
mounted my NGH 38 CC four stroke engine on a Hobby King Stick. I hope to maiden the stick in the near future.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)
Good luck with that. I have just flown mine in a scratch built 90" (228 cm) wingspan Ugly-Stik. It goes well. However a club mate has the HK version which is much lighter and less robust than my slab sided jobbie and it tears around the sky on an ASP120. With the NGH 38 I would be worried about the structural integrity of the HK Stik. However the proof of the pudding etc etc!!
Old 10-26-2015, 10:45 AM
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Originally Posted by the pope
Sent them an email about a product they had that I was interested in and never heard back . Unusual when your trying to give them $ . May mean something or not . Cheers the pope
Yep, I contacted them about ordering in a large model. They did reply, but it seemed they were reluctant to help and were trying to put me off. It seems as if they don't really want to work or provide a service for their $$$$
Old 11-01-2015, 10:59 AM
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g'day fellow paint shakers. I got one of these at about page 12 or so and have read with great interest. My experience has included just about every "problem" that others have had. On assembly, I noticed the carby bracket was off a little so fixed that, surfaced the nylon carby washer for sealing and clearance for the standoffs. Started it and oh my, very seismic. Read the posts about balance and instead of adding the tungsten I went the other way and lightened the piston and the pin side of the crank. Ditched the standoffs (will try again) for a nylon mount and smooth as, even with the crazy advance setting. My manifold broke between one run and another and HK replaced it quickly. I was worried the rocker box was dry after the first run so oiled the appropriate bits, (highly recommended to open all covers and oil it up) I got a bit of foreign object damage in the cylinder which the factory said was "pulling" probably the chinese eq. of galling, but with no witness marks on the piston or the rings? I found the push rods had sharp bits on one end, gone now. Heavy brunnelling on the cam face, even on the back face of the cam, both lobes! The question of the oil lines, I think the centre fitting goes to manifold and outside fitting to pulse, the reason is that the centre fitting shoots down the centre of the crank, and the crank acts as a centrifugal pump to oil the cam box. My unique problem lies with the push rod covers. Both leaking! Got a couple of 8mm x 2mm o rings and reduced one between two sanding blocks, used the other as is now no more leaks, I dissassembled the crankcase and re drilled the holes for the sensor to match the timing of my twin and all is good. Thank you all for the wealth of knowledge brought to this site. When I can post photos I will post my muffler, sounds like a BMW. Has anyone tried the ngh website lately? Cheers all. Kyte.

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Old 11-11-2015, 08:24 AM
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Default Rpm

hello,

after 3 tanks consumed on the ground I am planning to maiden my 25% Hangar9 J3 this coming weekend, my concern is the max RPM, with a MA 18x10 classic series, I get roughly 6200 rpm at WOT, it seems underpowered, is that ok? or can I do something to get more output, I will apreciate your comments

cheers Erwin

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