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It's a good thing I wasn't counting on getting the little 70" Extra ready for the short IMAC contest on the 10th. It arrived to day but, the vendor sent the wrong color plane.
The seller hasn't answered my emails yet and their phone goes to an answering machine. So, I don't know what they will do about it. It seems they have 3 different color schemes (A,B, or C) for this bird but, this one (C) wasn't pictured on their site. I ordered B and would have accepted A without a problem ....so, I get the one that wasn't pictured and wouldn't have chosen. Go figure. Garry |
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Scratch Building A Twin Engined EDF
Here's a picture of the twin engined jet I'm building. What I've built, so far anyway. The fuselage is 45". The wingspan will be 50" (including the angled wing tips) and have an area of 480 square inches. The weight will be approximately 5lbs (I hope) with a wing loading of around 24oz per square foot.
It will have two RC Lander 70mm electric ducted fans and should produce 1800 watts and result in approximately 360 watts per pound. That may be overkill...we'll see. It will also have E-flite retracts. The wing is not my design. It is a Tower Hobbies Voyager wing cut down to 44" and modified to take retracts and simpler, more stable wing tips. I bought the wing for about $40 from tower and stripped it down. I'm hoping the plane will be ready to maiden before the electric fly-in in November. I may need a better pilot than me to maiden it. Any volunteers? |
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MigStick Scratchbuilt EDF Twin
Well, it's finally finished. One day and one week before the electric fly-in. I'm calling it a MigStick and hope to maiden it next week before the fly-in. If not, I may have to draft someone to maiden it at the fly-in. Still asking for volunteers or maybe a co-pilot for moral support.
Here's the final specs: Length 45", Wingspan 50.5", Chord 10", Total Wing Area 490 sq inches (3.4 sq feet) Flying Weight 5 lbs, 12 oz (92 oz) Wing Loading 27 oz/sq foot 1800 watts (verified with watt meter at full throttle, 1792 watts) 313 watts/lbs It's a bit heavier than I'd hoped. It's weight puts it in the warbird range but having 313 watts per pound should make up for it. Any thoughts?? |
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Yes, it's my own design...well, kinda made it up as I went along. I've built several scratch built planes in the past mostly using Chuck Cunningham's rules-of-thumb for airplane design. They've were all pretty much conventional designs (propeller driven tractors). This is my first scratch built EDF "jet". And yes, with a fairly heavy wing loading it should take off and land pretty fast.
It may be more excitement than my heart can bear. Hope not. |
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The Yak is Back
You know you just don't know how much you enjoy a plane until its not around anymore.
I made a simple mistake that cost me a great plane, mixed up my battery packs by mistake, charged and not so charged. First pack I grabbed, you guessed it---not so charged. It had just enough juice to get me into the top of a Cuban 8 and the pack just left the building, the plane hung out, control still working but no air speed. Sometimes better known as a full stall. Yah it wasn't pretty when Rex and I got to the site, you know its bad when your buddy says bad words. And it's not even his plane. We gathered the remains and headed to the pits, after a general inventory the initial thoughts were confirmed... She's a goner, spared/salvaged the receiver, servos and some hardware, everything else was shot. So here's the good news, Aero Works had a 20% off sale... Wooohooo.. My lucky day indeed. And I just happened to have a special fund set a side for just such a day. This one is even better/faster than the last. Lessons learned: I have a brand new voltage checker in my box, and if you don't have one on board your welcome to barrow mine. Neil |
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It's never nice to see that happen, to anyone's plane. Glad you were able to get it replaced and save a couple of bucks in the process.
Rex |
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