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Re: the Fatal Flaw engine - Page 2 Empty

Re: the Fatal Flaw engine

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Thinking Re: Re: the Fatal Flaw engine

Post  rsv1cox Sat Feb 26, 2022 1:54 pm

I'm enjoying your thread, David. Be careful out there.
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Thu Mar 03, 2022 12:36 pm

Another modification that I wanted to complete before installing it I wanted a more efficient exhaust system than just direct It's a pretty noisy engine without a muffler and it nead a tuned pipe To work Properly next i tink of a Carburetor or maybe just a modified spray bar Huh... Re: the Fatal Flaw engine - Page 2 16463310
Re: the Fatal Flaw engine - Page 2 16463311
I already have a plane to install it which should do the job m'y os .15
ain't powerful enough and To Heavy Re: the Fatal Flaw engine - Page 2 Scree138
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Thinking Re: Re: the Fatal Flaw engine

Post  getback Fri Mar 04, 2022 8:56 am

Sad Yes no put hand over exhaust !!! I did that with a rag and it caught fire!! cheers cheers Yeah engine runs you need a stand LOL Beer Cheers
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Fri Mar 04, 2022 1:00 pm

Tink i wil skip the testing bench and install direct in a plane that i have converted to nitro wit a .15 os Huh...  Next is build a front housing for a carburetor mabe Not I'm unsure I have to do some tests on the motor I have to install it and try To se how it run wit a modified spray bar for rc medallion convertion soon a Litle video Popcorn i recived a gift from m'y nephews Who is now a machinist look à that litle truck body mold he made for me Very Happy bounce cheers Re: the Fatal Flaw engine - Page 2 16464211
Re: the Fatal Flaw engine - Page 2 16464210
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Wed Mar 09, 2022 10:30 am

I worked on my plane to install the engine The supor is really all crooked Nothing aligned the OS engine must have been very badly placed It's hard to remember it's one of my first conversions a miracle that this plane survived all this time With a little work it should be fine. RC Plane Re: the Fatal Flaw engine - Page 2 Img_2291
Re: the Fatal Flaw engine - Page 2 Img_2292
This is how i want To instal the engine a little Angled to the side To help for the big pipe Which will be fixed above the wing Huh... I have much to do
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Thu Mar 10, 2022 8:53 am

Soon ready for a first test I will film the video soon Re: the Fatal Flaw engine - Page 2 Img_2293
Re: the Fatal Flaw engine - Page 2 16469210
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Thu Mar 10, 2022 1:57 pm

À litleTesting vidéo Small Cox Logo Babe Bee .049
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Fri Mar 11, 2022 2:50 am

Part two   and three                     that was just a little test It's still cold here the engine is in the break-in period runing ritch and plug was loose To help me start wit starter The conclusion is that I managed to build a replacement cylinder for the .15 engines. cheers The spray bar isn't perfect, but hey, it works, that's all that matters.  And even Not having the right propellers I was still able to draw conclusions I could see that it would be capable of much more rpm with a good new propeller I am satisfied with the result of the spray bar I manage to control the engine much better than I had imagined I will probably install a carburetor but on a tee dee engine now I'm looking for engines that are too worn out To run in a plane To revive them I still have a lot of tests to do before offering A parts replacement solution for .15 cox engine Hope no one will get ahead of me I would like to produce them so that no one steals the idea from me If I have had the necessary means, we would already have several parts for our small engines. Doh!  I would really like to do this Small Cox Logo Babe Bee .049
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Thinking Re: Re: the Fatal Flaw engine

Post  balogh Fri Mar 11, 2022 4:59 am

Congratulations David, a great home-made engine revamping performance!Good Idea

I did not follow the details, I assume the cylinder and its liner were borrowed from another engine, and you have modified to match the piston of the .15 Medallion?

I see that spring is still chilli in your area in Canada!!! Snowman ..I would suggest you preheat the cylinder with a hairdryer before you start it, the wear on a newly coupled cylinder and piston may be excessive if the break-in of the engine starts with low metal temperature, especially if there is a steel and aluminum combination of the moving components in contact.??

I am sure it will not be easy for anyone to copy your engine re-make, the trophy remains yours!!! cheers
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Thinking Re: Re: the Fatal Flaw engine

Post  davidll1984 Fri Mar 11, 2022 6:49 am

Its Not a cox piston its a new aluminium piston in a brass crome plated liner I will experiment with different dimensions of transfert port i have a second one in préparation for testing i want To modify a tee dee next time also made a conecting rod of difrent lenght
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Thinking Re: Re: the Fatal Flaw engine

Post  getback Fri Mar 11, 2022 7:35 am

That looks Cold out there , Maybe leave the glow igniter on for a bit to warm it up after starting as it seems to cut off after removal. Got a jump on things more good luck to you ! Small Cox Logo
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