CMP 50cc Zero
 

Does anyone the distance from the firewall to the prop drive washer on a CMP 50cc Zero?
Also need the CG point.
Thanks!!!

The distance from the firewall to the prop drive washer is 210 mm, and the CG on my Zero is 135 mm from the leading edge.

Thanks Prekin.
What engine is that and what about that fancy exhaust system you have?
Looks like you're not using a cowl ring either.?

The engine is DLE 55. I made a scale exhaust system, because this Zero needs much weight in the nose. I use cowl, but I had to take it down for the measuring and this pictures.

I meant that it looks like you're mounting your cowl without using the inner ring.
It looks like you used the motor box and stand-offs. Did you cut the motor box down?

Sorry, I had a problem with the language. Now I understand, the inner ring is "a part" of fuselage. A do it on every airplane, it easier for me. The cowl hangs on the six screws. At the first picture you can see my Dauntless. I made a new motor box, you can see it in the picture.

Yes!!! I see what you're doing with the cowl. That's a great idea. So it looks like you used the provided motor box but cut it down to get the correct stand-off.
I'm building this with no instructions so your pictures and info is a great help to me. Don't worry about the language thing either. Your English is way better than my Czech.
Any chance of you taking a picture with the cowl on? I'm a little confused because it looks like there will be open vents between the fuse and cowl. I'm guessing that's where those goofy exhaust stacks they give you go.
You've got some great looking planes in your shop. Looks like a Stuka and ME 109 on the wing rack.

One more question - Did you offset the motor box to add any right thrust. If so, how much?
PS-love that scale exhaust you built.

I offset the thrust 1,5° down and 2° to the right. The vents in the cowl I made opened, because this is the way how to make more space for the air flow. I can send you more pictures, but I´ll be at home on the Friday.

If using the motor mount box that's supplied, it has the right thrust setup for you

casey

OK Guys,
I've got the fuse all done and most of the wings. Today's question is how did you attach the wing? I know I'll be drilling two holes through the trailing edge into the fuse but I'm not quite sure how to do the leading edge.
Did you make a one piece wing?
Pictures of wing mounting and retract install would be great.

I have two pieces wing.I attach it by two srews and two bolt in the leading edge.

How about a close up of the leading edge?
Did you use the supplied wheel well liners for the gear or make your own? Did you use the gear doors? the way they come cut they will never lay flush with the wing.

nice weathering!

Thank you.
I use ESM pneumatic retract which is given to ESM La-7. The wheels are bigger so I made new gear doors.
Can you explain this question please? : How about a close up of the leading edge? ( I have language problem, sorry)

I´m not sure, but maybe this picture could help you with the question:How about a close up of the leading edge?

Yes, those pictures were exactly what I was looking for. I'm thinking about making my wing one piece for simplicity's sake. All of my other warbirds are one piece already.
thanks for the info!! I'll post some pictures when she's done.

I´m looking forward them. This CMP kit is prepared for two pieces wing, because of the wingspan. But one piece wing is simple.

Here's the almost completed project. Still need to balance it but then we fly. If she's a "flyer" I'll add the gear doors and other scale details.
I only needed to add 8mm to the standard DLE stand-offs to get the proper distance from the firewall. Looks like you needed a lot more Prekin. i wonder if they changed the kit.http://www.rcuniverse.com/forum/atta...mentid=1982997http://www.rcuniverse.com/forum/atta...mentid=1982998

She will by good in the flight. :) Don´t afraid. Some weathering is allways good and nice. But you can do it after the maiden flight.

Are you sure about the cg location?

Never you can be sure ;) But this location is from CMP manual. There one general rule. CG is in the first third of MAC (middle aerodynamic curve), we can say, that is very close to the 1/3 of depth of the root rib.

At 145 mm back of the leading edge I need to add 2.27kg or 5 pounds of weight. That can't be right can it???

I´m afraid of that it could be possible.

What would be the dry weight with 2.27 kg?