Rcpilot
Posts: 6373
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline
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Use contest balsa on the sheeting for the stabs, hatch, turtledeck etc.. It's not recommended that you use contest balsa on the main wings, but I'd still use mid-grade balsa instead of the heaviest sheets you can find. It's the only way to get it as light as advertised. How do I know this? I talked to Mike about it. Went over to the mans house and looked at his shop. Talked to him in detail about the plane.
There are a few of these planes flying at some of the local fields. Some of them are a little on the heavy side. Some of the builders admitted that they did not use contest balsa for sheeting.
One guy that I know built one of these as light as he could get it. It's right at 25 pounds with a DA100. No bull. I've seen it on the scale. I don't know all the details, but he did use contest grade sheeting and the lightest sticks he could get for everything that didn't require lots of strength. Basically, don't skimp on the sheeting for the wings. You can sheet the hatch, turtledeck, stabs, fin, control surfaces with the lightest balsa that you can get. Use lightweight sticks on the belly stringers. Don't overbuild the motorbox. It's plenty strong enough.
I've flown it a couple times. All I can say is MAGIC
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Airplanes have expiration dates. It's just not printed on them.
I'm not really an airplane pilot; but I did stay at a Holiday In Express last night.
The artist formerly known as Rcpilet.
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Mike Hurley EXTRA 300 build!!! 
Mike Hurley EXTRA 300 build!!! - 
), so if you have any questions please let me know.