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Old Dec 13, 2011, 07:56 AM
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NGH 9cc gas engine thread

NGH is almost ready to deliver new gas engine... http://www.rcuniverse.com/forum/m_10..._1/key_/tm.htm


Specifications

* Type: 2 Cycle Air Cooled Gasoline Engine for Airplane Use Only
* Displacement (cc): 9.07cc
* Bore x Stroke (mm): 23.35 x 21.2
* Carburetor: NGH made 60G needle with pump membrane
* Maximum Output: 0.8HP@15000RPM
* RPM Range: 2600-15000RPM
* Ignition: Auto advanced RCEXL DC-CDI (RoHS and CE Certified) with special spark plug cap
* Spark plug type: 1/4 x 32 Rcexl
* Ignition Power DC 4.8 Volts (4 cell NiCad or NiMh battery
* Lubrication Oil: 2 cycle Engine Oil API TC / JASO FD or better specs. (Mobil + M2T)
* Break-in fuel oil ratio: 25:1 (4%)
* General use fuel: 20:1 - 25:1
* Recommended Propellers: 10x6 - 12x6 (two blades)
* Weight: 425g (without Ignition) 545g complete
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Last edited by Mikarro; Jul 19, 2012 at 05:47 PM.
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Old Dec 13, 2011, 08:06 AM
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Faaaaaantastic!
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Old Dec 14, 2011, 08:19 PM
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So does this engine have needle bearings? I see it has an oil injection system yet still recommends ~20:1 mix in the fuel. I guess that means no needle bearings in the conrod? idk, if I wanted an oil thirsty motor I would just stick with glow... But I need more info.
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Old Dec 14, 2011, 11:39 PM
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Yes no needle bearings for small engines because manufacturer(NGH) says there is no such small,reliable,good needle bearings.So he uses needle bearings on over 17CC engines.It is Chinglish so that "oil" word must be gasoline.So no oil injection but gas pump to carb..
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Old Dec 15, 2011, 01:45 PM
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Oh - well if it can safely run ~ 20:1 then I would be willing to give it a try even without a needle bearing. 5% oil beats 18-20 % Oil I am running in my glow motors... I wonder how the fuel economy will compare to the Saito 14 FG.
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Old Dec 16, 2011, 12:40 AM
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If I would be in your shoes,I would take it safe side and no worry to use more oil.(Unless you mean to involve racing ).Only will be needed to clean carbon time to time.
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Old Dec 16, 2011, 10:33 AM
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The engine has a FUEL PUMP operated off crankcase pressure.

NOT an "oil supply" or "oil filter" or "oil box" .

This a bad case of Chinglish .

It is always hard to translate technical language.
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Old Dec 17, 2011, 08:27 AM
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Quote:
Originally Posted by turk1 View Post
Yes no needle bearings for small engines because manufacturer(NGH) says there is no such small,reliable,good needle bearings.So he uses needle bearings on over 17CC engines.
Neither GT17 nor GT25 have a needle bearing on the con-rod...
but you can install it yourself http://www.rcuniverse.com/forum/fb.asp?m=9643869
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Old Dec 17, 2011, 01:50 PM
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Quote:
Originally Posted by Mikarro View Post
Neither GT17 nor GT25 have a needle bearing on the con-rod...
but you can install it yourself http://www.rcuniverse.com/forum/fb.asp?m=9643869
As I am informed directly from manufacturer(Michael Chow),NGH 25 and upper sizes have needle bearing conrod.(You can have bushing type conrod if you want,optional only for NGH 25 also)
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Old Dec 18, 2011, 02:42 PM
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Interesting. Is the the smallest gas engine out now? What size plane would it be for? I don't know much about gas power plants but want to learn more. I am assuming more torque at low RPM than glow since it has less top end HP (but similiar RPM)
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Old Dec 18, 2011, 09:59 PM
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It is the smallest one I know of - I would put it in my senior telemaster. It really beats the price (I am only assuming this based on the price of their other engines - not sure what this one will cost) of the saito 14 cc gasser 4 stroke and the BME .90 ci conversion.
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Old Dec 19, 2011, 06:59 AM
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the BME 90 is a 15cc engine of course it's a Super Tiger (chinese glow engine) converted to gas and they want 400 bucks for it.. What a huge margin profit!
it runs just fine because the Walbro carb however I cannot tell you the same about the FG14 and its glow carb issues.
the lowest price of the GT9 I have found online it's here VAT included 149€ http://www.modelpascher.com/catalog/...u6jhh1jqd08s26
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Old Dec 19, 2011, 11:48 AM
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Lowest price I think at Hi Model.http://www.himodel.com/sort.php?brand=228
165,5 $
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Old Dec 19, 2011, 01:09 PM
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turk1 they added it this afternoon because in the morning it was not advertised there yet.
about the price if you live in Europe you have to add 20% - 25% for taxes and customers fees + shipping from HiModel so it's a bit cheaper from the link I posted above. NGH does not have any MSRP and some dealers are crying because they cannot beat that great price..
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Old Dec 19, 2011, 04:35 PM
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It's hard to resist.... Any speculation on the stability of that price? It is so much cheaper than the other engines from that manufacturer....
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