Originally Posted by quadracer

Getting some more work done on the Extra tonight- I ended up getting an awesome deal on a Motrolfly 4315-714, so it'll run on 4S after all. Turns out, I was the original owner of this motor. Changed hands 5 times before coming back home. Lol
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I installed the Savox 1290mg I had in the rudder, but it sounded like there was rocks in the gear train, so I swapped it out for a 7985. Hopefully that's enough to keep blowback at bay. Lol
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if you are the original owner you should tell the seller you need your money back since you already paid for it once

My build is coming along.

I hope this has larger wing area than the 57". At least 700 in2 would be nice.
Vien

Originally Posted by djmoose

My build is coming along.

Woot!

Originally Posted by vienquach

I hope this has larger wing area than the 57". At least 700 in2 would be nice.
Vien

Well...without knowing the root and tip chords and actual length of one wing it is impossible to know, but if someone that had one could measure them, we could figure it out...

SteveT.

I might be able to do that. But there are only prototypes out right now, so the production version may differ.

Just for those who might not know how to determine the area of a wing...

And the wing loading of a wing

SteveT.

That page works great if you have a wing with a straight leading edge and a straight fuselage (root), but it's a bit more complicated when you have no parallel sides.

I'll let you figure it out.

Wing length at leading edge is 25 3/16"
At trailing edge, it's 27 1/16".

Chord at tip is 9 1/8", chord at root is 14 1/2"

These measurements all include the aileron, whether or not you include that as "wing" or not, I don't know. I'm just gonna fly it.

It's still easy.....you just use the average chord, which is in this case, 11.8125" (root chord plus tip chord divide by 2), so 11.8125" X 27.0625"= 319.6757 square inches X 2 for both wings= 635.3515" So, no not 700 Square inches.

SteveT.

27.0625 doesn't work, because the leading edge is shorter than the trailing edge. You'd have to average the wing span too.

Yes, you are correct... So it comes out to 308.6015 per wing, or 617.2031 square inches....still not 700 square inches

SteveT.

In the end, it isn't wing area alone that defines flight, but loading. We'll see how it turns out. I just wish I still had my 57 to fly back to back and see which I like better.

True...cubic wing loading also has something to do with it....

Be that as it may....and whatever it is, I want one of the 75" ones...

SteveT.

Originally Posted by quadracer

27.0625 doesn't work, because the leading edge is shorter than the trailing edge. You'd have to average the wing span too.

Sorry, not average.
You'd draw a line perpendicular to both wing root and wing tip. Length of that line is half the wingspan.
Area = 0.5(root chord + tip chord).span

Fuselage also contributes to the total lift force as well, can be approximated by some simple CFD jk

Well, if you want to get that technical, you can't simply average the chord either.