Hi,
Highly appreciated your support. With regards to your questions,

The idea for the twin is to cut down vibrations yet provide comparable power output to single 50cc class engine. After quenching those numbers, 65cc or even 70cc will be slightly over power (theoretically). So the idea for 60cc came about and the additional weight (against the 55cc single) is within a good margin ( at least based on my 3D illustrator software). The 65 or 70 the weight is a bit too much (but not that much also..) and to have a good ratio of bore against stroke, the cylinder head will be a bit longer than typical 50cc class airplane cowlings.

I think everyone here knows that the best possible location for the plug is dead center, this pose another problem i.e. the plug cap will be jutting out from cowling's sides... this will in turn favor the 60cc against 65 or 70. In fact i've tried to square the ratio(between bore and stroke), the output seems to be slightly less torque, don't really favor this, as i'm thinking of to spin at least 22 inch prop at 7200rpm therefore for pro-long cruising flights in excess of 1 hour a steady 3000 to 4000rpm will make the engine as reliable as it can be.

On the above note, my other intention for this engine is not only for typical RC aircraft but for UAV development as well.

Hi All, I know this is the DlE 111 post, but, maybe someone can direct me to the correct area. I can't think of a better scale looking engine than the OS 4 cyl. flat four, four cycle engine. The only thing that I would like for it, would be to turn it into a gas burner with spark plugs and an ignition system, and to have an electric starter system for it. I know it can be done, but the Titanic can fly too.

Thanks all for your assistance.

Steve

Hi Spete,
OS flat 4... i think FEMA have manufactured the start system, it has 2 versions; the rear mounted motor with extended shaft to the front, and another one is topside mounted motor. It may not be very elegant but it works.

To convert that engine into a gasoline engine is too simple to mentioned it here. Even though the sequence of firing for this flat 4 is one at a time, the current twin ignition unit for gasoline 2 stroke engine will do the job just fine. Off course you need 2 of them, single magnet with 180 degrees apart pick-up sensor and some 20 to 30 degree advance timing (should be changeable during setting up to suit your rpm range).

The only problem is the carb itself, linear flow carb just don't cut in for gasoline (change of atmospheric pressure as height changes is having more impact on gasoline engine than nitro as gasoline itself rely 100% oxygen from ambient to combust), perhaps you need to mod the carb mounting to suit a walbro style carb.

Hi Umran,

Thank for all of your help and insiration. I knew I would have to change carbs, but the ignition and starter systems have already been built. Maybe this is just a matter of shipping the engine to each vendor and have them do their specialty for the engine.

Thanks again, I really appreciate your help.'

'Steve

Steve,
Good to know at least someone benefited from my posted project....

I am in the process of buying a da50 or da60 with rear mount carberators will your system work with these engines. I am building an exact 1/5 scale mustang that I would like to use your system on.


                                        Rick F

Dear Rick,
DA50 or DA60 is a single cylinder with hanging crankshaft. The interface for the starting system to the engine itself is very difficult to achieve. I've done it, but it requires a full design change from the beginning.

Refer below videos,
[youtube]http://www.youtube.com/watch?v=GUPfBfZxNR0[/youtube]
[youtube]http://www.youtube.com/watch?v=OOOX8-CbQFU[/youtube]

If you're talking about twin engine, then it can be done with relative ease.

I would like to purchase the remote start I have a dle 170 on my pilot 37.5 yak please e mail me[email protected] or call 1 208 683 3213 Thank you Tim McGee Athol Idaho usa

Hi Jody,
We already have the 111 starter that Yong sent us, it is now being mass produced in China. Mike and Karl at our club have installed them on their 50cc war birds and they work good.
Tom
Valley View RC

Would love to see how they did that

Here is a video of an electric starter on the EME 55 that's in my ESM Fw-190.

http://youtu.be/WlYHt4ZAtEw

Hi, Bubba. I'm the Mike that denney47 referred to. Karl and I have the EME starters on DLE55's. Mine is in a TF GS P-47 and Karl's is in a TF GS P-51. Mine is pretty much stock, but Karl's starter had to be modified to fit inside the cowling of the Mustang. So far, they work just like they are supposed to. Here's a link to a video of my P-47.www.youtube.com/watch

Quote:

1. Pressure x Volume = constant(provided the temperature remain constant)
=> P1 x V1 = P2 x V2, where P1 = ambient pressure, V1 = Initial Volume, P2 = End Pressure, V2 = End Volume

End of Quote.

I think the compression process is fast and the temperature of the gas will rise. So the constant temperature assumption is invalid. Instead, an adiabatic assumption is a much better approximation. For an idea gas adiabatic process, PV^gamma = constant. The power factor, gamma, is 1.4 for air. Newton made a similar mistake when calculating the speed of sound.

It seems DLE did not carry your design to the market. This is very disappointing. Is there a way for us to apply your design?

If DLE can't steal it for nothing they won't want much to do with things.

Hi there can someone help me where can I buy an autostart kit for my dle 111 but the version 1 ? Thanks

I bought mine here.

http://www.bigplanes.nl/contents/en-...starters).html

Video here:

https://youtu.be/BIxJCxTggyU

We buy our starters from SDS Hobbies. But these are only for the version 3 DLE111 They won't fit the earlier versions.

http://www.sdshobby.com/engine-fuel-...ne-engine.html