RC Groups

RC Groups
    Engines
        Rave NGH 9cc gas engine thread

#1 Mikarro Dec 13, 2011 07:56 AM

NGH 9cc gas engine thread
 
6 Attachment(s)
NGH is almost ready to deliver new gas engine... http://www.rcuniverse.com/forum/m_10..._1/key_/tm.htm :popcorn:


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

#2 TimBle Dec 13, 2011 08:06 AM

Faaaaaantastic!

#3 chemnut842 Dec 14, 2011 08:19 PM

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.

#4 turk1 Dec 14, 2011 11:39 PM

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..

#5 chemnut842 Dec 15, 2011 01:45 PM

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.

#6 turk1 Dec 16, 2011 12:40 AM

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.

#7 SpaceCowboy Dec 16, 2011 10:33 AM

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.

#8 Mikarro Dec 17, 2011 08:27 AM

Quote:

Originally Posted by turk1 (Post 20142906)
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 :D http://www.rcuniverse.com/forum/fb.asp?m=9643869

#9 turk1 Dec 17, 2011 01:50 PM

Quote:

Originally Posted by Mikarro (Post 20161775)
Neither GT17 nor GT25 have a needle bearing on the con-rod...
but you can install it yourself :D 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)

#10 seeingeyegod Dec 18, 2011 02:42 PM

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)

#11 chemnut842 Dec 18, 2011 09:59 PM

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.

#12 Mikarro Dec 19, 2011 06:59 AM

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. :D
the lowest price of the GT9 I have found online it's here VAT included 149€ http://www.modelpascher.com/catalog/...u6jhh1jqd08s26

#13 turk1 Dec 19, 2011 11:48 AM

Lowest price I think at Hi Model.http://www.himodel.com/sort.php?brand=228
165,5 $

#14 Mikarro Dec 19, 2011 01:09 PM

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.. :D

#15 chemnut842 Dec 19, 2011 04:35 PM

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....


All times are GMT -5. The time now is 11:10 PM.