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Old Feb 19, 2013, 09:12 AM
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I think a 16 oz would be fine.
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Old Feb 19, 2013, 10:01 AM
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I agree with kerwin50 I have a 22oz in my 50cc extra, and have never burned 1/2 a tank, even when I had ta fly an extra 5 mins waiting for the field ta clear! 16oz should give ya close ta 20 mins of agressive flying!
Old Feb 19, 2013, 11:04 AM
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Great info guys thanks
Old Feb 20, 2013, 02:42 AM
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I can't wait to here how that motor pulls your plane around.
Back in the day that was a top of the line motor.
They were one sweet running motor.
Old Feb 20, 2013, 01:06 PM
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Bought a 19x8 prop gonna try and start it today
Old Feb 20, 2013, 10:51 PM
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Need to find some mounting bolts for the motor got prop drill and mounted. I can't wait to here this puppy roar
Old Feb 21, 2013, 10:56 PM
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Okay motor is mounted and I got it to fire just need some work on getting it to run
Old Feb 22, 2013, 12:10 AM
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O boy
Old Feb 22, 2013, 11:36 AM
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That plane looks very suspiciously like a Midwest Extra300... Not totally sure.. as there are a few things that are different, but that could be attributed to the builders preference...

Overall though.. its very possible. A pic of the radio compartment would tell for sure. I built, and own a Midwest Extra... is the reason it looks very familiar. There weren't too many that large that had a one piece wing, and its the wing-cut-out in the bottom of the fuse that was my first clue, as well as the tail-group being flat. There were 2 versions of these.. the first-generation(of which mine is), has the flat-tail groups, and flying-wires(very necessary with flat-tails)... and the 2nd generation that had the foiled tails, with no flying wires(not necessary because of the built in triangulation of the foil)...

But this one does have a few variations from the original plans.. not far off.. but theres a few diffs.. one being the landing gear doesn't look original... as the original gear included with the kit was a "curved" design.... another deviation is the flying-wires on this plane.. the original kit specced 2 sets all the way around.. and for whatever reason, the builder obviously installed one set all around.. so thats my observation.. get some more pics ... and there might be some more info I could share with you.

When you say 6.5lbs.. I'm going to guess is the fusealage alone.. without the wing.. as that weight is extremely conservative, if not impossible for the whole airframe..even in the best scenarios.

If you're really weight concious... the engine pictured should have a chain tied to it, and thrown off the boat for an anchor... If you want something to reasonably fly the plane..don't throw it off the boat, and just install it and go have fun.. but if it is in fact a 43cc.. it will fly decently.. not excellent. The best case scenario would probably be a modern 50cc or so engine.. but its all good.. fly what you got.

I'd say a 24oz tank would be fine.. and leave plenty of reserve. I've got a 24oz in my Extra300.. with a 50cc engine... and I've never ran out of gas.. or even close.. I'd bet it would run 25minutes or so on 24oz's.. A 16oz is a tad small though.. at least for my liking..

Nice little plane you have there.. I hope this helps a bit.. The Midwest Extra really brought the giant-scale aerobats into mainstream... They also had a Cap that was equally cool..

Post some more pics if you get a chance... Have a great day.
Old Feb 22, 2013, 11:53 AM
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I may stand corrected but I don't think that is a 43 ccer, I think it's a 70 ccer.
I think you should post some pictures of that motor over at flying giants and get some other thoughts on it.
It is definetly a sachs cylinder
Old Feb 23, 2013, 10:14 AM
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Well I was thinking of replacing the engine with DLE 55 as I need to work on this motor now that I had a mishap with the carb. I will look for 24oz tank rather have half a tank left than go empty. Here are some more picsName: ImageUploadedByTapatalk1361632460.156149.jpg
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Old Feb 23, 2013, 10:35 AM
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Oh it weights more like 10 pounds with wings and no motor or electronics.
Old Feb 23, 2013, 10:53 AM
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Thats probably the best choice for an engine.. they're actually very affordable. I think I can say beyond a shadow of a doubt... Its not a Midwest. The first clue is the foam plugs.. under the cockpit area.. and the wing-mount position/assembly.. as well as the engine box configuration.. its radically different from the Midwest model. I might venture a guess on a Lanier... they also had a nice line of aerobats, in direct competition with Midwest, and GreatPlanes, and a few others. Everyone was getting on the "Extra" bandwagon.. I didn't even ask, nor did I see in any pic... is that a foam-core wing? (Midwest wings are built ups)..... and all this is just food for thought.. anything that flies is good..its about having the fun man.

But yeah.. you might look/search Lanier for info... or something close.. thats if you might need specific info to the kit/frame.. I definately concur on your choice of power though.. thats right in the ball park.
Old Feb 23, 2013, 03:03 PM
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That DLE should be a better fit for that plane.
Old Mar 23, 2013, 09:51 PM
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Okay I got my 77" edge finished and flying with DLE 35 it weights in at 10lbs with empty fuel tank. Now I want to finish this plane 81" extra 300. Right now it weights in at 11lbs. Basically bare plane. So I am looking at flying weight of around 15lbs or so. I don't want to put to big of a motor on this plane. I put 65cc motor and it shook the plane violently. So I sold that motor. Now is 55cc motor good enough or should I go to 35cc. By the way I am buying DLE


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