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

NGH 38CC 4 stroke

Reply
Old 11-15-2012, 10:50 AM
  #1
SJN
Thread Starter
 
Join Date: Sep 2002
Location: Copenhagen, DENMARK
Posts: 6,205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default NGH 38CC 4 stroke

This looks nice.
Anyone got one yet ?

http://www.himodel.com/engines/NGH_G...ol_Engine.html
Attached Thumbnails
Click image for larger version

Name:	Pm34788.jpg
Views:	1006
Size:	78.1 KB
ID:	1820534   Click image for larger version

Name:	Zu65451.jpg
Views:	3275
Size:	109.1 KB
ID:	1820535   Click image for larger version

Name:	In26844.jpg
Views:	1855
Size:	110.6 KB
ID:	1820536   Click image for larger version

Name:	Om32227.jpg
Views:	892
Size:	135.8 KB
ID:	1820537   Click image for larger version

Name:	Dy79980.jpg
Views:	818
Size:	93.0 KB
ID:	1820538  

Click image for larger version

Name:	Rw58198.jpg
Views:	2234
Size:	99.8 KB
ID:	1820539   Click image for larger version

Name:	Cv62298.jpg
Views:	2103
Size:	86.6 KB
ID:	1820540  
SJN is offline  
Reply With Quote
Old 11-15-2012, 11:18 AM
  #2
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,970
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

I can't get one for a while, but I plan on it.
I find it odd they bent the fuel inlet tube over and pointed it up. That would tend to make the fuel line make a large loop to the carb on the engine.
Good thing they sold out already, so I don't have to fret about getting one for a while.


I noticed some people had posted videos of it already, so a few people are flying them so far.
earlwb is offline  
Reply With Quote
Old 11-15-2012, 12:07 PM
  #4
airraptor
 
Join Date: Jan 2004
Location: fairfield, CA
Posts: 4,086
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

My thoughts are this is a big magnum engine that was set up for glow. now it will be gas with no increase in cooling fins. will have to run rich and dont think it could be cowled in.
airraptor is offline  
Reply With Quote
Old 11-15-2012, 03:26 PM
  #5
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,970
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: airraptor

My thoughts are this is a big magnum engine that was set up for glow. now it will be gas with no increase in cooling fins. will have to run rich and dont think it could be cowled in.

Saito didn't increase the cooling fin area on their gasser four strokes either. But I don't know if anyone cowls the gasser Saitos in or not.
earlwb is offline  
Reply With Quote
Old 11-15-2012, 04:18 PM
  #6
acerc
 
acerc's Avatar
 
Join Date: Sep 2006
Location: The Sunshine state, when it's not raining!
Posts: 8,108
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

Doesn'tgas and nitro run in the same temperature range?Thefore no change needed in the fin's or cowl application's?
acerc is offline  
Reply With Quote
Old 11-15-2012, 05:25 PM
  #7
mikes68charger
 
Join Date: Oct 2010
Location: , OH
Posts: 1,632
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

Who is selling this motor in the US?

i got my NGH 35. FromAGAPE RACING AND HOBBY, and the customer service has been great
mikes68charger is offline  
Reply With Quote
Old 11-15-2012, 08:25 PM
  #8
Ernie Misner
 
Ernie Misner's Avatar
 
Join Date: Jul 2002
Location: Tacoma, WA
Posts: 5,020
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

Gas doesn't give the cooling effect that running methanol through it does. The intake manifold on 4-strokes will get frost on them sometimes.
Ernie Misner is offline  
Reply With Quote
Old 11-15-2012, 09:49 PM
  #9
Turk1
 
Turk1's Avatar
 
Join Date: Oct 2004
Location: Istanbul, TURKEY
Posts: 1,083
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: airraptor

My thoughts are this is a big magnum engine that was set up for glow. now it will be gas with no increase in cooling fins. will have to run rich and dont think it could be cowled in.
There should be a YouKu video showing while running on bench they are checking temp continuously.I cant put exact link because that YouKu is a real trouble when I try to open.

Turk1 is offline  
Reply With Quote
Old 11-16-2012, 08:37 PM
  #10
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,970
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: acerc

Doesn'tgas and nitro run in the same temperature range?Thefore no change needed in the fin's or cowl application's?
Gasoline doesn't provide a cooling effect that methanol does inside of the engine. Methanol runs at a much more rich air to fuel ratio and has a wide range for the ratio too. Gasoline on the other hand needs to be used at a much more lean air to fuel ratio and the range of the ratio is much more narrow. But in any case the gas engines tend to operate at a somewhat more hot temperature than the glow engine does. But if you are using a really good quality oil in the engine the higher operating temperature isn't a problem. But operating the engine inside of a cowl on a airplane may require more careful consideration for air flow and ducts to route the air over the engine good too.

It is somewhat amazing how much cooling methanol can have in a glow engine. When you look a at some of the racing engines, they tend to have little to no cooling fins on them and they tightly cowl the engines in as well. But the engines run OK like that.

Here is the temperatures I was measuring on a NGH 9cc gas engine, at the base of the glow plug, when it was 82 degrees F outside a while back. In the heat of the summer when the ambient temperatures are higher, the engine's temperature goes up accordingly too.



earlwb is offline  
Reply With Quote
Old 11-16-2012, 09:38 PM
  #11
Octopus RC
 
Join Date: Dec 2004
Location: QuzhouZhe Jiang, CHINA
Posts: 222
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

It`s a good engine , you guys will love it !
Octopus RC is offline  
Reply With Quote
Old 11-17-2012, 08:43 AM
  #12
airraptor
 
Join Date: Jan 2004
Location: fairfield, CA
Posts: 4,086
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: Octopus RC

It`s a good engine , you guys will love it !
Coming from the saleman lol

What prop and rpm? how much is it in US. The roto motor 35 will spin a 20x10 xoar at 6,000
airraptor is offline  
Reply With Quote
Old 11-17-2012, 12:04 PM
  #13
SkyPilot101
 
Join Date: Jun 2007
Location: Freedom, PA
Posts: 574
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

It look's like the rod is equiped with needle bearings, that said, I would gladly snatch one up at $380, much better than 1000+ for a simular size Saito! Hell, run it on gas/glow mix if you want some extra cooling
SkyPilot101 is offline  
Reply With Quote
Old 11-17-2012, 06:01 PM
  #14
earlwb
 
earlwb's Avatar
 
Join Date: Aug 2009
Location: Grapevine, TX
Posts: 5,970
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: airraptor

What prop and rpm? how much is it in US. The roto motor 35 will spin a 20x10 xoar at 6,000
One of the videos of them testing the engine had it turning a 20x10 wood unknown brand prop at 5,500 rpms.

I would assume the cost would be about $20 to $30 more in the USA than from HiModel in China.

earlwb is offline  
Reply With Quote
Old 11-18-2012, 10:46 AM
  #15
jeffEE
 
jeffEE's Avatar
 
Join Date: Nov 2002
Location: farmingtom, MN
Posts: 1,428
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

I would pick one up if I could find one that was not "OUT OF STOCK".
jeffEE is offline  
Reply With Quote
Old 11-18-2012, 01:23 PM
  #16
TimBle
 
Join Date: Apr 2010
Location: Cape Town, SOUTH AFRICA
Posts: 2,744
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: airraptor

My thoughts are this is a big magnum engine that was set up for glow. now it will be gas with no increase in cooling fins. will have to run rich and dont think it could be cowled in.
you ca only fit X amount of cooling fin area on a given mass of engine.

TimBle is offline  
Reply With Quote
Old 11-18-2012, 02:09 PM
  #17
mpascual
 
Join Date: Oct 2003
Location: Tres Cantos, SPAIN
Posts: 464
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

First test on a production unit today:

GREAT ENGINE !!!!!
Include the engine mounting plate, RCEXL ignition, allen wrench, RCEXL standard CM6 spark plug,
My only guess is to include a 120 degrees spark plug cap. Better fit than 90 degrees supplied.

I've dismantled all parts to take pictures and check quality : awesome..
Needle bearings on both sides of con-rod, a custom WT1022 carb, very well made the intake mainfold , with two nipples, one for the oil from cranckcase and one for carb pressure pulses. Many interesting mechanical solutions, and NONE of the parts are from Magnum or a glow existing engine. All parts are designed from scratch. Like many others products of differents manufacturers ,they looks the same ....

[youtube]http://www.youtube.com/watch?v=gfiSpIg8pz0[/youtube]

Best regards
mpascual is offline  
Reply With Quote
Old 11-18-2012, 02:21 PM
  #18
WindGap
 
Join Date: Aug 2010
Location: Irmo, SC
Posts: 228
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

when will this get stateside?
WindGap is offline  
Reply With Quote
Old 11-18-2012, 02:36 PM
  #19
mpascual
 
Join Date: Oct 2003
Location: Tres Cantos, SPAIN
Posts: 464
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: WindGap

when will this get stateside?
Sorry
I don't know.

mpascual is offline  
Reply With Quote
Old 11-18-2012, 04:28 PM
  #20
SkyPilot101
 
Join Date: Jun 2007
Location: Freedom, PA
Posts: 574
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: mpascual

First test on a production unit today:

GREAT ENGINE !!!!!
Include the engine mounting plate, RCEXL ignition, allen wrench, RCEXL standard CM6 spark plug,
My only guess is to include a 120 degrees spark plug cap. Better fit than 90 degrees supplied.

I've dismantled all parts to take pictures and check quality : awesome..
Needle bearings on both sides of con-rod, a custom WT1022 carb, very well made the intake mainfold , with two nipples, one for the oil from cranckcase and one for carb pressure pulses. Many interesting mechanical solutions, and NONE of the parts are from Magnum or a glow existing engine. All parts are designed from scratch. Like many others products of differents manufacturers ,they looks the same ....

[youtube]http://www.youtube.com/watch?v=gfiSpIg8pz0[/youtube]

Best regards


Have you looked at the rocker box, do the valves run in guides? If so, do they look like bronze, I'm currious as to how well the exaust valve will hold up.
SkyPilot101 is offline  
Reply With Quote
Old 11-18-2012, 04:41 PM
  #21
WindGap
 
Join Date: Aug 2010
Location: Irmo, SC
Posts: 228
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

definitely one of the more interesting offerings from China in a while

I'd play with this one and see how it turns out.
WindGap is offline  
Reply With Quote
Old 11-18-2012, 11:24 PM
  #22
TimBle
 
Join Date: Apr 2010
Location: Cape Town, SOUTH AFRICA
Posts: 2,744
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: mpascual

First test on a production unit today:

GREAT ENGINE !!!!!
Include the engine mounting plate, RCEXL ignition, allen wrench, RCEXL standard CM6 spark plug,
My only guess is to include a 120 degrees spark plug cap. Better fit than 90 degrees supplied.

I've dismantled all parts to take pictures and check quality : awesome..
Needle bearings on both sides of con-rod, a custom WT1022 carb, very well made the intake mainfold , with two nipples, one for the oil from cranckcase and one for carb pressure pulses. Many interesting mechanical solutions, and NONE of the parts are from Magnum or a glow existing engine. All parts are designed from scratch. Like many others products of differents manufacturers ,they looks the same ....

[youtube]http://www.youtube.com/watch?v=gfiSpIg8pz0[/youtube]

Best regards
Hi Pascual,

Wll you be flying this soon? I'm interested to know if it develops enough thrust for a 2x2 pattern application.

TimBle is offline  
Reply With Quote
Old 11-19-2012, 09:08 AM
  #23
airraptor
 
Join Date: Jan 2004
Location: fairfield, CA
Posts: 4,086
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke


Quote:
ORIGINAL: TimBle


Quote:
ORIGINAL: airraptor

My thoughts are this is a big magnum engine that was set up for glow. now it will be gas with no increase in cooling fins. will have to run rich and dont think it could be cowled in.
you ca only fit X amount of cooling fin area on a given mass of engine.

Yes that is true but you can make them wider ie: more aluminum to heat up and more area cool with.
airraptor is offline  
Reply With Quote
Old 11-19-2012, 10:21 AM
  #24
TimBle
 
Join Date: Apr 2010
Location: Cape Town, SOUTH AFRICA
Posts: 2,744
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

But the amount of heat needed to be absorbed by the air is in proportion to the power produced and the efficiency of the engine. If the mechanical efficiency is similar and power produced is similar then heat rejection is similar....
TimBle is offline  
Reply With Quote
Old 11-19-2012, 12:15 PM
  #25
airraptor
 
Join Date: Jan 2004
Location: fairfield, CA
Posts: 4,086
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: NGH 38CC 4 stroke

So this engine isnt very storng then???? lol
Glow ones ran warm. Then the gas one will run hotter is all I am saying.
airraptor is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

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



All times are GMT -8. The time now is 08:42 AM.