zeroback

This will be my first twin. I have another 250 that fly's like a dream. I recently rebuilt it and added the mods intended for this kit. Those were BL Lipo power, dual aileron servos, and a steerable nose wheel. So having this kit on hand and a two identical 2805's, I figured this would be a fun plane. Thanks to the QC boom there is a wide selection of counter rotating props which will allow for some experimenting ounce it's in the air. I'm also installing LED lighting. This is a super simple airframe to build the way SR designed it so the mods should be an easy task. I've decided to finish it in a USN scheme, mainly because I have a roll of Parklite blue. Might be close to the Angels blue. So far other than adding some holes to the ribs for wiring the build is straight forward.

zeroback

Already an oops in the photo anyway.. This is the way I'm thinkin this will work. The prop shaft center is on the same line as the single motor. Seems everything in the plans is square like my foamy 3D airframes. Any one have a thought on the subject? Next comes to mind is the ESC arrangement guess I need to find out how that's done.

zeroback

Making some headway.

zeroback

Motor mount structure built and weight check. OEM design is 24oz, with a 1350 3S pack I should come in slightly under spec.

zeroback

Like Hangin drywall in a house the covering always makes the frame start to look like something.

Twin_Flyer

My Feedback: (4)

Interesting build zeroback!

I have a 250 waiting for repairs and am enjoying your mods!

Bill S.

zeroback

Thanks,
This is were my interest in the 250 started http://www.rcuniverse.com/forum/cras...x250-saga.html

zeroback

I read that every gram of weight removed from the tail removes a total of 4 grams of overall airframe weight. I have found that to be a pretty good rule of thumb along with light is might.

Twin_Flyer

My Feedback: (4)

Hmmm, mine is already built but I should be able to do that with a drill press... Did you use a hole saw or forstner bits?

Thanks,
BIll S.

zeroback

I use brass tubes sharpened using a #11 razor blade, and spin the tube by hand to cut balsa . For plywood I cut little teeth into the tube and stick the tube in a drill. The edge has to be re sharpened after cutting several holes. I saw this concept of a tool for sale by one of the RC company's at the LHS. I think it was $10.00 or so, it comes with a knob attached to the tube and an inner rod recoiled with a ball point pen spring to clear the plug from the tube. I use a piece of metal rod to poke the plug out of the tube after each cut.

zeroback

On with the covering, I found these screaming chicken stickers for 99 cents, I'm not sure if I'll use them yet.

Twin_Flyer

My Feedback: (4)

Where did you find those stickers? They do look cool and seem to be a good fit for the plane anyway.

Bill S.

zeroback

The stickers came from HK
https://www.hobbyking.com/hobbyking/...al_Sheets.html

I'm thinking that the bird beak would go better with the cargo plane look verses the single man bubble windscreen. I cut a 1/4 inch off the bottom of the foam cargo plane cockpit, it looks much better. I plan on using yellow trim similar to the Blue Angels scheme, My other CX250 has a colorful scheme that ultimately adds to loosing orientation. It's translucent film on the wings makes it look like it is in a different position at times, than it really is. It is small and fast enough that keeping track of were it's at is best done by memory not visual orientation if the frame is at much distance. So, I make lots of turns and keep it close.