Go Back  RCU Forums > Glow Engines, Gas Engines, Fuel & Mfg Support Forums > Gas Engines
Reload this Page >

NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Notices
Gas Engines Questions or comments about gas engines can be posted here

NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Old 04-06-2013, 03:26 AM
  #1  
RCer22
Senior Member
Thread Starter
 
Join Date: Sep 2002
Location: Somewhere in the Adirondacks, NY
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Default NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Has anyone tried the NGH GT9 9cc Gas Engine With Rcexl CDI Ignition?
I saw an ad for in it the new AMA mag.
It says it is good for a 40 to 60 size plane but I have my doubts because of the HP output. It is kind of on the low side compared to the Evolution 10 cc gas motor.
This does have a good price tho.
Old 04-06-2013, 05:31 AM
  #2  
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,993
Likes: 0
Received 2 Likes on 2 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

They have a long running thread here about them. http://www.rcuniverse.com/forum/m_10693112/tm.htm
I am running three of the engines in planes at this time. But you may need to work on the pump/regulator unit to get it to work OK. The pump/regulator unit is sensitive to engine vibrations as well, so it needs to be somewhat isolated from the engine vibrations. The carburetor is different from normal too. The carb throttle is 1/2 open for idling. But that is about it for engine issues. The engine works well with a 11x7 or 11x8 prop. It develops power about like a .40 to .45 glow engine does.

Yes the NGH 9cc engine isn't as powerful as the Evolution 10cc engine. The NGH engine uses a ringed piston whereas the Evo 10cc engine uses a ABC design. The NGh 9cc engine is also slightly smaller in displacement by 1cc too. But neither engine develops as much power as a same size glow engine does.

Old 04-06-2013, 06:17 AM
  #3  
RCer22
Senior Member
Thread Starter
 
Join Date: Sep 2002
Location: Somewhere in the Adirondacks, NY
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Thank you for the reply. It sounds to me like a40 size plane is too big for this one.
The evo 10cc appears to put out way more power.
Thanks
Old 04-06-2013, 07:21 AM
  #4  
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,993
Likes: 0
Received 2 Likes on 2 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Well it depends on your flying style. I have one engine on a great Planes Big Stick .40, another engine in a Great Planes Escapade .40 and a the third engine in a .45 size low wing pattern plane. The pattern plane flies at about 85mph the big stick at around 65 mph. But some people are putting upwards of .91 two stroke engines on .40 size planes and complain they aren't powerful enough, so it depends on you really as to what you like.


The low wing is fairly large for a plane and the NGh 9cc engine pulls it around pretty well. But the same plane is a fire breather with a .60 glow engine on it though.







Old 04-06-2013, 12:29 PM
  #5  
Turk1
 
Turk1's Avatar
 
Join Date: Oct 2004
Location: Istanbul, TURKEY
Posts: 1,085
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition


ORIGINAL: Evgeny-arm


And then the math leaves no advantages for NGH.
Hornblende has made ​​crooked throw that would cause the engine to work (and bulky and heavy pump should there).
We get 130$ (price HK (there are more price)) + 40$ (Perry Large Carburetor SuperTigre .45-.61/OPS .60) + 36$ (Perry Regulating Pump Gas & Smoke) + 7$ (Fourmost Gasoline Check Valve) = 213$.
That's just for the money you get a perfectly running engine.
Hi Evgeny, instead you can "remove the regulator needle from pump unit and put a return to tank line just before carb nipple with a T connector" thats all you need to have a great running NGH GT 9.Maybe you would need to play with a little with LSN profile too .

Old 04-06-2013, 06:08 PM
  #6  
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,993
Likes: 0
Received 2 Likes on 2 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

I found out that I was misinformed so I am deleting this post.
My apologies.


Old 04-07-2013, 06:59 AM
  #7  
Pete Bergstrom
Senior Member
 
Join Date: Apr 2002
Location: Champaign, IL
Posts: 424
Likes: 0
Received 1 Like on 1 Post
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Earl

I think you have been given some wrong information. The bearings we use are from Germany and the entire engine is assembled and test run at our factory before shipping. 

Pete
Old 04-07-2013, 07:48 AM
  #8  
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,993
Likes: 0
Received 2 Likes on 2 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Thank you very much, I have been misinformed.
My apologies.

Old 04-08-2013, 04:03 AM
  #9  
Turk1
 
Turk1's Avatar
 
Join Date: Oct 2004
Location: Istanbul, TURKEY
Posts: 1,085
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Hi Earl, I have been told by Michael just  as you said, Its so hard to have import bearings if already there Chinese made.
Old 04-08-2013, 09:29 PM
  #10  
Turk1
 
Turk1's Avatar
 
Join Date: Oct 2004
Location: Istanbul, TURKEY
Posts: 1,085
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

BTW, I prefer bushing type con rod always(its pure strong  copper conrod  now in GT9) because needle types have risk to disintigrate anytime.
Old 04-15-2013, 05:24 PM
  #11  
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,993
Likes: 0
Received 2 Likes on 2 Posts
Default RE: NGH GT9 9cc Gas Engine With Rcexl CDI Ignition

Well the NGH OEM carb and pump/regulator unit do work OK. I think people are still trying to have the carb work like a normal carb. It does have issues, but it does work well nonetheless. Most problems are with the pump/regulator unit. You need to use a fuel filter to keep crud out of the carb and pump/regulator. The pump/regulator is sensitive to engine vibration and also heat and it may leak and need some TLC to fix that too. You may need to replace the diaphragms as well. The pivot arm for the fuel inlet valve can get bent down and need straightening out some too. replacing with with a mild steel one from a Walbro rebuild kit works too. Many of the parts in a Walbro rebuild kit fit the pump/regulator just fine.

First here is a pic of what the throttle barrel looks like when the engine is idling. it is open about 1/2 way. But it does work well that way. You can adjust the throws on the servo using a computer TX easily enough. next the low speed needle is about 6 turns out and the high speed is bout 1.5 turns out. yes the carb spits fuel, but that is normal for any IC engine with more aggressive port timing. The fuel spitting does not mean it is too rich on idle. You don't need to change the needle tapers and other mods to the carb.



Here is a short video clip showing that the engine and carb do work and can be throttled at different speeds OK.

[youtube]http://www.youtube.com/watch?v=3Zfeq-B6e3E[/youtube]

Old 08-26-2022, 05:20 PM
  #12  
daveracerdsh
Junior Member
 
Join Date: Aug 2022
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default

Help! I just bought a HG 9cc gas motor...no directions as to how the ignition system is supposed to be hooked up...
Old 08-26-2022, 08:54 PM
  #13  
1967brutus
Senior Member
 
Join Date: Oct 2021
Posts: 671
Received 41 Likes on 40 Posts
Default

Originally Posted by daveracerdsh View Post
Help! I just bought a HG 9cc gas motor...no directions as to how the ignition system is supposed to be hooked up...
??? It is pretty self-explanatory???

Plugcap goes to the sparplug, (duh!), then there are three cables on the ignition box.
The 2-wire cable is the power supply and hooks up to any battery suitable to supply a receiver. Red = +, black = -
The black round rubber enshrouded cable goes to the sensor that should be allready mounted on the front of the engine. Cannpot connect wrong.
The flat 3-wire cable shold be labeled "RPM signal output Tachometer" and is left unconnected unless you intend to use some form of RPM measurement.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.