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Search: Posts Made By: JieM
Showing results 1 to 25 of 48
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Forum: Gas Engines
10-22-2023, 10:50 PM
Replies: 2,806
Views: 704,654
Posted By JieM

The FG60R3 carburetor does not have an internal...

The FG60R3 carburetor does not have an internal filter (unlike the Walbros). And if small debris or dust enters with the gasoline, it is almost impossible to clean it properly. These impurities then...
Forum: Gas Engines
12-08-2022, 01:00 AM
Replies: 2,806
Views: 704,654
Posted By JieM

The ignition point on the engine is a real issue....

The ignition point on the engine is a real issue.
Out of the box we have
cylinder #1 45deg BTDC
cylinder #2 53deg BTDC
cylinder #3 40deg BTDC

Really too much

My engine is adjusted to 30deg...
Forum: Gas Engines
10-31-2021, 10:34 AM
Replies: 2,806
Views: 704,654
Posted By JieM

That's correct, even the rocker cover gaskets...

That's correct, even the rocker cover gaskets have to stay tight!

JM
Forum: Gas Engines
10-31-2021, 08:28 AM
Replies: 2,806
Views: 704,654
Posted By JieM

An example of a graph with temperature and RPM ...

An example of a graph with temperature and RPM

https://cimg0.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1920x1080/2021_10_24_rpm_temp_cyl1__8072e8fc7f46a68efd6822d3806a4c30ce987264.png

...
Forum: Gas Engines
10-31-2021, 07:43 AM
Replies: 2,806
Views: 704,654
Posted By JieM

This POV is for anyone who says: use the engine...

This POV is for anyone who says: use the engine as it is out of the box.
What is the real life expectancy of this engine?
- 10 hours of operation? In this case you can actually use it as it is, it...
Forum: Gas Engines
09-06-2021, 09:28 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Hi pilots! A recent video with my FG 60R3 which...

Hi pilots!
A recent video with my FG 60R3 which is now almost 7 years old. The sound is always a real melody!

Video here

JM
Forum: Gas Engines
04-28-2020, 02:19 AM
Replies: 2,806
Views: 704,654
Posted By JieM

There is no connection between exhaust and tank....

There is no connection between exhaust and tank. So, no tank pressurization to "help" the carb....
JM
Forum: Gas Engines
11-17-2019, 01:16 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Hello Cathurga, can you confirm the broken #2...

Hello Cathurga, can you confirm the broken #2 cylinder was a new design?
My FG60R3 is still on the shelf, waiting for a new airframe...
However, I made some additionnal tests on the bench, and find...
Forum: Gas Engines
09-27-2019, 11:04 PM
Replies: 2,806
Views: 704,654
Posted By JieM

Hi Didier, I use 2S2500 Lipo (the blue Turnigy...

Hi Didier, I use 2S2500 Lipo (the blue Turnigy one) and had never ignition issues.

JM
Forum: Gas Engines
06-27-2019, 12:23 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Hi khoysagk For my information, how many hours...

Hi khoysagk
For my information, how many hours of flights for your 3 engines?
I'm always looking for someone who has actually run these engines over 50 hours (= 300 x 10 minutes fligths) ... and...
Forum: Gas Engines
06-24-2019, 07:36 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Hi Cathurga, that's not correct. The maximum...

Hi Cathurga, that's not correct. The maximum stress is on the main rod. It is the only one who rotate by 360deg with the load of the 3 pistons. The 2 others make just small oscillations with their...
Forum: Gas Engines
06-20-2019, 09:41 PM
Replies: 2,806
Views: 704,654
Posted By JieM

For your information Olivier Rogeau (Modelisme...

For your information Olivier Rogeau (Modelisme Micromoteurs Service) makes some tests with a needle bearing on the master rod. This guy is a French craftman who also makes intake modification on the...
Forum: Gas Engines
06-12-2019, 02:10 AM
Replies: 2,806
Views: 704,654
Posted By JieM

As far as I know, RCexl timing curves are not...

As far as I know, RCexl timing curves are not linear curves, but step curves. That means that the timing is at 4deg at idle to 2000rpm and after 2000rpm jumps directly to 28deg. I will try to find my...
Forum: Gas Engines
05-24-2019, 09:21 PM
Replies: 2,806
Views: 704,654
Posted By JieM

Don't worry, everything has been checked, and...

Don't worry, everything has been checked, and since the reassembly the engine has already worked 2 hours without any problem.
FYI, on the picture, the condition of the 3 pistons (without cleaning...
Forum: Gas Engines
05-23-2019, 08:25 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Some news from my side: I had some problems...

Some news from my side:
I had some problems during flight due to a total electrical power failure not yet explained to date.
The plane is now closer to a 5000-pieces puzzle than a nice DHC-2...
Forum: Gas Engines
04-15-2019, 10:55 PM
Replies: 2,806
Views: 704,654
Posted By JieM

Cathurga, I make my gaskets myself. I buy A4 ,A3...

Cathurga, I make my gaskets myself. I buy A4 ,A3 sheets or rolls of gasket material. It exists very good quality in different thicknesses.
It's easy to reproduce the gaskets with an x-acto scalpel,...
Forum: Gas Engines
04-11-2019, 10:22 PM
Replies: 2,806
Views: 704,654
Posted By JieM

Thanks for your update. I appreciate that this...

Thanks for your update.
I appreciate that this 2 main mods (negative crank pressure and 30 deg timing) work also in other engines that mine.
Do you have measured the temp of the crankcase ?...
Forum: Gas Engines
04-06-2019, 11:31 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Sr T, It's is a basic electric starter for...

Sr T, It's is a basic electric starter for 2stroke engine up to 60cc and it works easier with the FG60R3 that with a DLE 55 or a OS GT60. So it's really not an issue. Probably because you have only...
Forum: Gas Engines
04-06-2019, 06:51 AM
Replies: 2,806
Views: 704,654
Posted By JieM

It works great. I use the electric starter for...

It works great. I use the electric starter for the first start of the day. My carburetor has a starter flap, but I don't use it.
Next starts can be made by hand, 1 or 2 flips are in general enough
...
Forum: Gas Engines
04-05-2019, 10:59 PM
Replies: 2,806
Views: 704,654
Posted By JieM

Of course you have to close the breather nipple....

Of course you have to close the breather nipple. As the air + gas goes through the crank case, the low engine is actually cooler - measured temperature <60 ° C. But as the gases pass through the low...
Forum: Gas Engines
04-03-2019, 11:04 PM
Replies: 2,806
Views: 704,654
Posted By JieM

The discussion about valve timing is interesting,...

The discussion about valve timing is interesting, but probably has less impact on engine operation than the ignition point. Do not forget that these engines work with low RPM compared to the engine...
Forum: Gas Engines
03-30-2019, 08:35 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Thanks Cathuga for your post. I think exactly the...

Thanks Cathuga for your post. I think exactly the same thing, but I would not have said it as well since English is only my 3rd language...
A number of craftsmen offer improvements to run this...
Forum: Gas Engines
03-29-2019, 10:32 PM
Replies: 2,806
Views: 704,654
Posted By JieM

It does not result in 120deg firing order, it...

It does not result in 120deg firing order, it result in 30deg BTDC on each cylinder. And it works fine. Engine runs smoother, and iddle can go to 900 rpm. Just impossible with a 53deg BTDC.

JM
Forum: Gas Engines
03-29-2019, 06:09 AM
Replies: 2,806
Views: 704,654
Posted By JieM

Thanks for this document. Extract of this...

Thanks for this document.
Extract of this document: "The other situation occurs in the angle value of the top dead center position of the pistons. The maximum difference occurs between the cylinders...
Forum: Gas Engines
03-28-2019, 09:49 PM
Replies: 2,806
Views: 704,654
Posted By JieM

I have measured the degrees BTDC exacly like...

I have measured the degrees BTDC exacly like shown on this video. And as said previoulsly the out of the box values are 45, 53 and 40. The video shows the measures made with a modified magnets...
Showing results 1 to 25 of 48
 
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