Bought these Engines from RC Dhamaka
First Review GT9

NGH GT9 (http://www.rcdhamaka.com/index.php?main_page=product_info&cPath=58_61&products_id=888) (http://www.nghengine.com/show.asp?id=9)

Dimensions (http://www.nghengine.com/show.asp?id=9#)
Manual (http://www.nghengine.com/downfile/20111219161840.pdf)

UnBoxing

1. Very Neatly Packed, Smells petrol, presumably, test run
2. Contents
    (a) Engine with a NGH Carb
    (b) Fuel Delivery Sysem
    (c) Electronic Ignition Unit
    (d) Black , Cool Looking Muffler
    (f)  1/4 X32 Spark Plug (Same dimensions as the Glow Plug)
    (g)  Owners Manual
    (h)  Required Allan Keys & Few Decal Stickers


PS
Please Note the Carb on the GT9 is China Made Carb with a separate Fuel Delivery system, Whereas GT17 has a Walbro Carb. Advantage of Fuel delivery system is that it gives you flexibility of CG matching by keeping fuel delivery system within 85 cms of engine anywhere.

Quick !! run it and tell us how it goes !!

what is the wt ?

Great news Augustine . Looking forward to your erudite opinion! 

Wonderful buy WingCO.  ......few questions.
a) What size of model it suits?
b) Apart from fuel what all advantages you see in it ?
c) What is the quivalant engine in Nitro .46, .52 or bigger ?
d) How easy to hand start it ? or we need a starter always!

I am also waiting for your review here in Pune Gusty. 

looking at the carb assembly  in your pic...! wont the prop hit the needle..?? or is  it not in place yet...! doesn't look like it is in place compared  to the other pics on their  site.

In order to ensure that carb is not damaged in transit, many mfrs do not tighten the carb spigot into crank case throat. User needs to do that. Looks like exactly that situation, and if it is it is good. 

Augestiv when will u post review for ngh gt9 9cc engine?

here is the comparison of weight
JBA 46 with everything, NGH 9CC with everything, NGH minus the engine

Warming up!!! Good, the interesting parts should start soon!

I am yet to figure our how to fix the pulse pressure operated fuel pump within
8.5 cms from the engine. (Or go the Glow engine way of bypassing the pump completely). anyways here is it, mounted onto my Warbird, Supermarine Spitfire

Gusty bhai, eagerly waiting to hear it Roar!!!.. I was about to order one from their site (which was BK order that time), saw your thread about it and decided to wait till you test and certify Hope you would find some time to play with it!

got to wait, minor glitches, in touch with OEM.

Unlike a normal Gas engine this one has a Glow type Carb and a Pulse Pressure operated Diaphragmatic pump. Now the OEM picture is as shown below however he pump is not as shown in the OEM picture, pipe lines connections are as i have indicated below

The had a replacement pump. First pump did not work as desired (Repairing a Diaphragmatic pump is no big deal, i am yet to open up and repair it). method followed to start is as follows:-

1. Connected it and reduced the length of the pipe from 85mm to about 40 mm,
2. dry cranked it (Without spark), allowed fuel to come in
3. connected the spark and on the fourth flick she came to life. (Oh! the sound of a Gas Engine)

Few issues that needs to be borne in mind

(a) Needless to say you need to use regular pipe meant for Gas (petrol) engine. Get the one with lesser innner dia, even scooty fuel pipe would do, be sure to wirelock (can put a clip too, but even in real aeroplane we believe in wirelock more than clips, in fact there are no clips in a fighter it is all wirelocks) both ends as i have done. (I used 5/32 I.D. Tygon Dubro tubing, had very little left of it   )

(b) Idle throttle open is 3-4 mm

(c) rich cut at full throttle is 2.8 turns and lean cut is .65 turns. ideal is (1/8 turn richer than peak RPM) is 1.5 turn

(d) Keep in mind i am at 7000 feet elevation, at the time of testing outside temp was close to Zero. at plains and at higher temp there will be variation, be advised.

(e) She literally sniffs fuel, fuel consumption is so less. for the same amount of Nitro Fuel this engine would give you comfortably give you 1.5-2 times the flying time.

My recommendation is "Go For it"

PS
As and when it is available (there are 4 x GT9's here in Shillong itself, Karthik sold out before unboxing i heard). Watch this space for the flying review of the Spit with GT9

Thats great news Gusty Bhai!  Thanks for the headsup and will wait for the flight report 

Quote from: augustinev on January 19, 2012, 07:42:25 PM
(Oh! the sound of a Gas Engine)

Especially a well designed and well tuned engine. It was Music to hear that day. Oh boy what response to the Throttle input even at such near zero temperatures.

Definitely an excellent buy. Very Happy with it.

Quote from: augustinev on January 19, 2012, 07:37:07 PM
Now the OEM picture is as shown below however he pump is not as shown in the OEM picture, pipe lines connections are as i have indicated below

mmp
it doesn't matter though , the pump we received in India has outlets as shown in my image, all three nipples are 90 deg to each other, in my aeroplane i cant mount the pump as shown in your image, there is no place, moreover there is no mount supplied as indicated in your image you will have to make one yourself

Received my first pair of this gas engines yesterday    . Waiting for my gas fuel pipe so to start with a scratch built.

Hopefully will be witnessing today gusty's maiden of his spitfire on this gas engine.

Hi augustinev,

Have you tried on ur spitfire?
Eargerly waiting for your comments 

the second pump requires some fine tuning too, i think it is to do with the Diaphragm pressure adjusted form the front screw, sandy and i spent 2 hrs in this biting cold , start was good, wasn't holding due reasons i am yet to figure out, give me a week more, (Of for a course of some sorts)

Gusty Bhai, tell us the good news 

Looks very close to the engines, car maker Hpi shown at Nuremberg. Could be possibly based on this. That was a 8cc (.50).