Starting a G-Mark .03

That looks Great! Hope it runs as good as it looks!!

Marleysky wrote:That looks Great!  Hope it runs as good as it looks!!

Thanks Friend ... I think everything is working fine !!!
I'm working on a model .... SHHH      ... do not tell anyone!

oh it seems that the tin plug that had been placed in the exhaust chamber has been removed. I'm going to have to put in some very small screw!
(indicated in the photo with yellow arrow)

Well, I have finished another Pocket Rocket and I have placed the G-Mark .03.
I'll be waiting to have time to go fly and test how the model behaves.
Here are a few photos ... I will give you some more!

Very nice
I look forward to your video and opinion on the engine power compared to the TD .020 during flying.

Beautiful planes Mauricio congratulations!

Excellent workmanship, Mauricio. I'll be interested in hearing how the G-Mark .030 RC compares with the Cox .020 Tee Dee in flight.

thank you very much friends of mine! ....
Here I leave some photos so that you can appreciate the two models, each with its engines.
I hope to be able to fly soon ... I will share my experiences with you...

more...

Very good craftmanship. Congratulations.

Levent Suberk wrote:Very good craftmanship. Congratulations.

Thanks friend!

Well, well, well ... how to explain ... I'll try to do it ...
Install the G-Mark .03 in my Pocket Rocket model, the engine runs at full throttle, but can not regulate ... so I started to see what the problem was.
Finally I discover that the height of the engine is very much above the height of the fuel tank and there is no way to accommodate the engine lower because of its size, it is also not possible to place the fuel tank higher. Believe me I made all the attempts, but finally I will discard this engine for this model size, it is necessary that the model is a little larger, to be able to place it correctly and aligned with the fuel tank.
While I think that a Tee Dee .020 Cox will be the replacement.
The G-Mark .03, will have to wait for you to build an appropriate model for it.

That is the ideal position of heights, engine and fuel tank, impossible to achieve in the Pocket Rocket!

You would have to modify or eliminate one of the cheek cowls, but you could mount the engine horizontal. Then the fuel tank would be in line with the carburetor.

GallopingGhostler wrote:You would have to modify or eliminate one of the cheek cowls, but you could mount the engine horizontal. Then the fuel tank would be in line with the carburetor.

Yes friend I thought, even if I put the inverted model the engine works very well, regulates accelerates and all of wonders, that's because when inverting the model, the engine is below the height of the tank.
I thought then of placing the engine at 90 degrees, at 45 degrees and even put it inverted, but I'm sorry to have to sacrifice the nose or nose of the model ... I prefer to start a new project for the engine, now that I learned some details of the operation , I think it's worth doing something new for him ...but ... the G-Mark .03 will have to wait!

You have the feed line to the carb going up and over the firewall this causes fuel draw issues.
You could reroute the feed line. Note the clunk distance to the carb vs if the tank was a
smaller diameter and a bit longer to elevate the clunk closer to the nipple on the carb.
The clunk sweet spot is always a bit below the carb nipple so fuel will not flood the carb when
the engine is not running. If the tank diameter is over the height of the carb the fuel mass
can push out and flood the carb. The trick is to find the right diameter or square tank that
works well with the engine  size and location on the firewall.

Thanks friend Brad, you're right. Here I leave the real photo of the location of the tank and engine in my model (outside) so that the difference in level between one and the other is appreciated.
Here is all wrong!
I will have to see if it is possible to place an adequate tank - tank and that the height is correctly.

I would try and reroute the fuel line before moving forward with a new build and (the planes look Great ! ) Just asking because i don't know ((( would it bee beneficially to put a spring in the fuel hose like a reedie to help with the fuel flow ?? Or will it slow it down as not to get the fuel needed?

MauricioB, Brad and Eric have valid points. I'd probably trim the bulkhead so that the tank could be moved back may be a half inch, then strengthen the bulkhead by overlaying it with 1/32"- 1/16" thick plywood glued to it. straighten the fuel feed line so it penetrates the engine bulkhead.

Thanks guys ... I am already starting to work on a new "extra flat" deposit to achieve a better flow.
I will be sharing the results!

more...




To be continued...

MauricioB wrote:more...




To be continued...

Very nice! And you got to play with the lathe, too, sweet.

Nice lathe work, Mauricio, good way to a new tank stopper. When I mentioned a possibility of also mounting engine sideways, here's one way someone solved it some time back, made a hole or clearance for the cylinder: