NGH 35 CC Gas engine.
06-23-2013, 08:38 AM
#101
My Feedback: (2)
Join Date: Apr 2010
Location: columbus ,
OH
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ok just got this engine from mike68charger an found he ran all thread threw the muffler housing an used form a gasket on the back what a mess but i guess it works compared to the loosing of the muffler nuts internally not good
06-23-2013, 09:18 AM
#102
RE: NGH 35 CC Gas engine.
Chandley could you post pictures of the fix you describe?
And I still stand by my earlier comments about those lousy gaskets.
I changed the gaskets, changed the 6 M3 bolts to 20mm length used nord lock washers on all 6 (had to grind off the washers and a bit on the muffler for the washers to seat). Changed the two M5 bolts to 15mm length and used nordlocks there as well.
Total run time about 5 minutes and what do we have? The main gaskets are gone and that gap created is start of the bolts loosening.
Next fix cut my own gaskets or use high temp RTV for gasket. Next time I would rather buy a DLE
And I still stand by my earlier comments about those lousy gaskets.
I changed the gaskets, changed the 6 M3 bolts to 20mm length used nord lock washers on all 6 (had to grind off the washers and a bit on the muffler for the washers to seat). Changed the two M5 bolts to 15mm length and used nordlocks there as well.
Total run time about 5 minutes and what do we have? The main gaskets are gone and that gap created is start of the bolts loosening.
Next fix cut my own gaskets or use high temp RTV for gasket. Next time I would rather buy a DLE
06-23-2013, 11:02 AM
#104
RE: NGH 35 CC Gas engine.
J301
The biggest problem with that I see is if one has to dismantle the muffler for any reason.
How come the manufacturer has no help to offer here and we want either from the horses mouth or from people who have been actually using the engines (certainly not from people who have friends and relatives flying these engines)
The biggest problem with that I see is if one has to dismantle the muffler for any reason.
How come the manufacturer has no help to offer here and we want either from the horses mouth or from people who have been actually using the engines (certainly not from people who have friends and relatives flying these engines)
06-23-2013, 12:06 PM
#105
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
I found this (sort of): http://palmlabsthreadlockers.com/thr...ll-bolts-up-to
It says its removable high temp thread lock, equivalent to Loctite 246, but I cant find a place that sells it in less amounts then a case at a time. Guess I could look for the 246 some more, but so far its all been huge (for lock tight) bottles for too much $$$. (not going to spend $100 to throw away, or never use, 99.872 % of it![:@])
It says its removable high temp thread lock, equivalent to Loctite 246, but I cant find a place that sells it in less amounts then a case at a time. Guess I could look for the 246 some more, but so far its all been huge (for lock tight) bottles for too much $$$. (not going to spend $100 to throw away, or never use, 99.872 % of it![:@])
06-23-2013, 02:19 PM
#108
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: johnboy151a
j301, Did you ever figure out what happened with your P-40 crash?
John
j301, Did you ever figure out what happened with your P-40 crash?
John
06-23-2013, 04:21 PM
#110
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: johnboy151a
Starting to wish I had gotten the DLE-35RE.
John
Starting to wish I had gotten the DLE-35RE.
John
) is it was rail mount, what I needed for the CMP P-40. It was about the same prince then, but I believe less expensive now then the DLE, the 35R for sure. I wonder if Bowmen bakes a ring for it, and if its worth trying. I know that most DLE guys go with Bowman rings for the improved performance. Its ironic, "the circle of life" in my case; started with a CMP F4U with a Magnum (ASP) 180 4c in, crashed it getting it too slow trying to get a stuck gear down (clogged sel. vlv turns out), put the 180 in the P40, sold the 180 to get the NGH, now the NGH is going back into a CMP F4U (on a large Great Planes eng. mount=where the stand-off mount DLE would have worked
)... These are the Days of our Planes...
06-23-2013, 04:56 PM
#111
RE: NGH 35 CC Gas engine.
Honestly I got this engine for a future project the I probably wont start any time soon. I have the short-kit for the Dave Anderson Howard Pete, and this engine fit the plans just right. The original build calls for a Saito 150-180, but others that have built this plane said that the Airframe only lasted a few years due to the "sloppy, messy" nature of the Saito. So for now I will learn as much as I can from listening to folks that are using this engine now.
If you find out about the Bowmen ring, please let me know.
Good luck with your Corsair!
John
If you find out about the Bowmen ring, please let me know.
Good luck with your Corsair!
John
06-23-2013, 05:06 PM
#112
RE: NGH 35 CC Gas engine.
J301 you rule out the carb position theory as I have no such issues and my carb sticksjust behind the cutouts in the cowl for intake. I would sure ivestigate on heating especially if the muffler was rear mounted. The engine head kind of covers. The entire muffler and blanks out most airflow to the muffler. So unless you have ducts/baffles directing air to the right places I would suspect it to be heat issue.
Another point worth noting about the NGH is the parts availability
I ordered some from Himodels in China. Was told that the NGH factory was under reorganization (does that mean having troubles) and it would be few weeks before they would ship.
Another point worth noting about the NGH is the parts availability
I ordered some from Himodels in China. Was told that the NGH factory was under reorganization (does that mean having troubles) and it would be few weeks before they would ship.
06-23-2013, 05:30 PM
#113
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: mchandrayan
J301 you rule out the carb position theory as I have no such issues and my carb sticksjust behind the cutouts in the cowl for intake. I would sure ivestigate on heating especially if the muffler was rear mounted. The engine head kind of covers. The entire muffler and blanks out most airflow to the muffler. So unless you have ducts/baffles directing air to the right places I would suspect it to be heat issue.
Another point worth noting about the NGH is the parts availability
I ordered some from Himodels in China. Was told that the NGH factory was under reorganization (does that mean having troubles) and it would be few weeks before they would ship.
J301 you rule out the carb position theory as I have no such issues and my carb sticksjust behind the cutouts in the cowl for intake. I would sure ivestigate on heating especially if the muffler was rear mounted. The engine head kind of covers. The entire muffler and blanks out most airflow to the muffler. So unless you have ducts/baffles directing air to the right places I would suspect it to be heat issue.
Another point worth noting about the NGH is the parts availability
I ordered some from Himodels in China. Was told that the NGH factory was under reorganization (does that mean having troubles) and it would be few weeks before they would ship.
Could be a heat issue, but it didnt run all that long, I'd say a normal "start, brief warm up, check throttle up, taxi out" routine. It wasn't its first run either, I had done some ground handling checks a little earlier, but the engine was luke-warm I would say when I started the test (or last) flight. Either way, once I get it in the corsair I will be paying close attention to all those factors.
As far as the "restructuring," if that means what it usually means, looks like we might be stuck with some "brand new legacy" equipment![X(]
06-23-2013, 07:22 PM
#116
RE: NGH 35 CC Gas engine.
Have been searching for a suitable one piece muffler for this engine but to no avail, other than getting one custom made. A link to the above said one piece muffler would be helpful.
j301 my engine is currently on a world models Extra 300 the 160 size.
j301 my engine is currently on a world models Extra 300 the 160 size.
06-23-2013, 09:38 PM
#117
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: mchandrayan
j301 my engine is currently on a world models Extra 300 the 160 size.
j301 my engine is currently on a world models Extra 300 the 160 size.
And looking up age racing, omg, soo many choices, and so not rc stuff
06-23-2013, 11:02 PM
#118
RE: NGH 35 CC Gas engine.
In such a situation a fast taxi down the runway without the cowl would havwe confirmed if cowl was the culprit. Oh well may be next time.
Also I am sure the front mounted carb is not the culprit as if it was all those millions of engine with front carb would not have been happily running and flying
Also I am sure the front mounted carb is not the culprit as if it was all those millions of engine with front carb would not have been happily running and flying
06-24-2013, 06:35 AM
#119
Thread Starter
Join Date: Oct 2004
Location: Istanbul, TURKEY
Posts: 1,085
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: mchandrayan
J301
The biggest problem with that I see is if one has to dismantle the muffler for any reason.
How come the manufacturer has no help to offer here and we want either from the horses mouth or from people who have been actually using the engines (certainly not from people who have friends and relatives flying these engines)
J301
The biggest problem with that I see is if one has to dismantle the muffler for any reason.
How come the manufacturer has no help to offer here and we want either from the horses mouth or from people who have been actually using the engines (certainly not from people who have friends and relatives flying these engines)
06-24-2013, 06:40 AM
#120
My Feedback: (3)
RE: NGH 35 CC Gas engine.
ORIGINAL: j301
Thanks, the reason I ask is because the motor didn't start spuddering until it was moving faster then taxi. Never on the bench during break in, not on the plane when I ran it on the ground to finish the break in, and not during taxi or engine run up.
And looking up age racing, omg, soo many choices, and so not rc stuff
ORIGINAL: mchandrayan
j301 my engine is currently on a world models Extra 300 the 160 size.
j301 my engine is currently on a world models Extra 300 the 160 size.
And looking up age racing, omg, soo many choices, and so not rc stuff
Many pump style carburetors have a 'normal air' breathe hole near the diaphragm (?) and if that is in the rushing air (facing the intake), you tend to get unpredictable results from the carburetor. There are normally 4 screws that hold the diaphragm plate on, cut a chunk of tin can to cover the entire plate, sand the edges to reduce the cut tendency and secure it under 2 of the screws leaving between 1/8 and 1/4 inch air gap under the far side. This shield puts the hole in the lee of the wind and solved my problems on several other gassers.
Good luck. And please report.
06-24-2013, 06:47 AM
#121
RE: NGH 35 CC Gas engine.
Turk
I would rather spend my money (next time) on some thing that works rather than spend time sending fruitless mail and waiting endlessly for a reply.
I would rather spend my money (next time) on some thing that works rather than spend time sending fruitless mail and waiting endlessly for a reply.
06-24-2013, 11:16 AM
#122
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: Jim Branaum
Actually when reading your first description I thought ''that sounds like an air problem I have run into on other engines and solved''. When you made the above comment I decided that my experience should be shared.
Many pump style carburetors have a 'normal air' breathe hole near the diaphragm (?) and if that is in the rushing air (facing the intake), you tend to get unpredictable results from the carburetor. There are normally 4 screws that hold the diaphragm plate on, cut a chunk of tin can to cover the entire plate, sand the edges to reduce the cut tendency and secure it under 2 of the screws leaving between 1/8 and 1/4 inch air gap under the far side. This shield puts the hole in the lee of the wind and solved my problems on several other gassers.
Good luck. And please report.
ORIGINAL: j301
Thanks, the reason I ask is because the motor didn't start spuddering until it was moving faster then taxi. Never on the bench during break in, not on the plane when I ran it on the ground to finish the break in, and not during taxi or engine run up.
And looking up age racing, omg, soo many choices, and so not rc stuff
ORIGINAL: mchandrayan
j301 my engine is currently on a world models Extra 300 the 160 size.
j301 my engine is currently on a world models Extra 300 the 160 size.
And looking up age racing, omg, soo many choices, and so not rc stuff
Many pump style carburetors have a 'normal air' breathe hole near the diaphragm (?) and if that is in the rushing air (facing the intake), you tend to get unpredictable results from the carburetor. There are normally 4 screws that hold the diaphragm plate on, cut a chunk of tin can to cover the entire plate, sand the edges to reduce the cut tendency and secure it under 2 of the screws leaving between 1/8 and 1/4 inch air gap under the far side. This shield puts the hole in the lee of the wind and solved my problems on several other gassers.
Good luck. And please report.
That I believe speaks to "all those millions of engine with front carb would not have been happily running and flying", as I am not saying its an overall design issue, its an issue with this install, and I don't believe I am the only one who ever experience this. Yes, fast taxis with no cowl wold have been nice, but you know what they say about hindsight. What I can do is re-research this and try it on the next one.
06-24-2013, 11:29 AM
#124
Senior Member
My Feedback: (12)
Join Date: Feb 2008
Location: Mesa,
AZ
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
RE: NGH 35 CC Gas engine.
ORIGINAL: johnboy151a
http://www.rcuniverse.com/forum/m_10...69/key_/tm.htm
About half way down the page
http://www.rcuniverse.com/forum/m_10...69/key_/tm.htm
About half way down the page
Really though, thanks, I will be reading that over tonight!