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My avid C speedwing @ 458 empty weight is a rocket off the ground and climbs like a home sick angel, despite the Missing wing area

Could you imagine how light a carbon sparred, wood ribbed, Hershey barred, oratex Wing would weigh, with titanium jury struts.

I bet the wooden ribs are lighter. I don’t like the Carbon ribs because it seems the compression will try and delaminate them. Just thinking, no real experience

I also thought of Hershey barring the wings which eliminates the fiberglass tips so maybe another 1lb. The juice isn’t worth the squeeze, but I find most aviation things aren’t...just a little bit further in the spectrum than I’d wish. Though $1600 for 4 isn’t the worst misallocation of money, and you are lighter and stronger. Just fun to play with ideas.

I was thinking you may be able to drop 10-15lbs and have a stronger spar. I talked to James and he said the spars are $400 each

drumming up convo...my wings are naked hanging on the wall, and I keep reading these articles. Not that I have the disposable income, or time, or knowledge, or skill....but if you built our STOL wings exactly yo plans, but instead with carbon fiber spar, I’m curious as to how much you’d save.

http://jameswiebe.blogspot.com/2010/11/building-carbon-fiber-wing-with.html?m=1

https://jameswiebe.wordpress.com/2009/08/09/breaking-a-carbon-fiber-wing/amp/

Solid wires may be thermocouples wiring. What motor? You’d be hard pressed to get me to do a 200 mile trip in my speedwing. My advice is to do everything you can to get it airworthy, and fly the snot out of it, don’t worry Terribly about upgrades and such, you end up with a plane down for projects longer than anticipated that you can’t fly.

have two of these, I typically weld up a larger capacity header tank to mount behind the seat so I don’t need these. Make an offer, whatever’s fair plus shipping.

Good thing about no doors is you can really feel when you’re not in trim

It’s what conceptually made sense in my head regarding accelerated stall, glad I’m not being ignorantly wreckless....just ignorant.

Yesterday in the avid it was 10kts gusting to 15kts, and I had to make a spirited bank to get on final. Maybe 30 degrees, and I was decending, and maybe 60 kts. In retrospect I’m not entirely sure it was a safe maneuver, but as a relatively low time fixed wing pilot, and a decently hour’d rotary wing pilot, I thought I’d consult the brain trust.

Jim I used a large 3 jaw from autozone

I couldn’t take it boys....had to go do just that. My axle behind leading edge, which means my cg a-ok

not that it's gospel...but on the manual page 1-9 the example for the nose gear is "-" but the tail dragger the mains are "+". I could travel back out to the hangar and just level out the aircraft and drop a plumb line, but the manual plus i just for some reason remember the axles being behind....but really it doesn't make sense that they would be.

yea, now i'm gonna try to find where i can source lead shot locally to make a weight bag. i was flying around at 11.2 cg because i didn't minus the moments of the front wheel weight, i added them.

yikes, i've been flying with it forward of cg...for some reason i seemed to remember when i leveled out the aircraft, the axle was behind 1.5"....at least i know it flies ok forward of cg.

i'm doing some calcs, and can't remember if the tail dragger avid c main axles are 1.5" -ish aft the 0 datum, or forward.

Man I wish we could get more done on your project it’s super exciting. If this proof of concepts I’d love for teal to make this gear box

Is this duke from the Facebook page?

Ditto Fred, but looks like it’s the tanknover the left seat so that helps a little with balance, and I don’t know if the juice is worth the squeeze to fix it. Redoing tanks can easily turn a weekend job into a 3 month rebuild

So you’re saying like a baggage compartment,

I’m not even ready to start on them yet, but when I went to go hang these up I’m curious. One wing has the filler neck in the second bay....one wing has the filler neck in the 1st bay with a square cut out. Anyone know what the builder had in mind?

You’re the best jim 

installing the rk400 clutch I tore up the Rotax 582 pulse line. Does anyone off hand know the size?

The rule of thumb is bigger than what you think you’ll need. But I usually go with as much as I can afford.