Good Bye Ol' Iron Ass

[Dewey H Lee]

Hey Dan
Maybe a chunk of foam but slot of hard work. I don't blame you and may I say that is a piece of art now. Boy she sure is pretty. I don't blame you for not wanting her to get hurt. Bring out the video if you can on the maiden and I'll get out my shades for the viewing😎.

[boomer108]

Hey Gman!

Like I said before, you are becoming quite the model artist. That plane is beautiful. I don't blame you for being afraid to fly it, I would be to. Great job buddy!

Roy B.

[Grossman56]

Okay, now here's something interesting.
I had to add some weight to the nose and put a 1300 battery in the nose to get her to balance out, basically treat it like a 'with sound' plane to hit the CG. She balances with the 3600 and the 1300 all the way forward and not much difference with the 4000 either, a little more nose heavy, which could be a good thing for now. So, my thought is that she would be a prime candidate for a 650kv and an 85A ESC. A little more power and a bit more weight in the nose couldn't hurt, then I could pull some of the lead off her.
In the mean time, I'll do the zip tie mod to give the prop a little more bite and see how that works.

Grossman56

[farmflyer]

Gman did you weigh it before and after? I'm wondering if the large surface area at the mid section where the scoop is added a lot of weight behind the wing making it tail heavy.

[Lon]

Gman, you have me scratching my head....that much tail heavy

[Grossman56]

Yeah, had me wondering too! But the factory CG with just a 3600, all the way forward just made her sit on her tail. I added the battery and she still needed a bit more to balance out. Now with the 4000's its a little bit better. I hate to add that weight, but its probably no more than the sound system would weigh. Like I said, she's a prime candidate for the 650kv, I'd rather the extra weight be the motor than dead weight. I'm going to check her out again tonight just to make double sure I've got it right. But the CG machine is right on the little squares on top of the wings, where the landing lights attach. I remember Todd saying he had to add some weight to his as well, maybe he'll chime in.
Really, the flight metal isn't that heavy, weighs .0022222 ounce to the square inch. according to their website
So go figure.

Grossman56

[Dewey H Lee]

Wheeee. That or Callie sent you some heavy graphics😆.

[Grossman56]

Yep, rebalanced her last night on the squares with the weigh as described and she's right on the mark. Go figure. Anyway, it convinces me that I need to go with the 650kv and an 85A Mantis, which also means I need to order the 650kv motor mount, waiting for stock to show up.

Happy Chinese New Year!!

Grossman56

[Grossman56]

Got to thinking, I wonder if they didn't manufacture two differently weighted fuses? I mean, the expense would be high , but its funny how this one balances up. I guess the only thing I can really chalk it up to is the Flite Metal, even though the weight of it is negligible. But then when painting a plane, you always recheck the C/G afterwards. If I consider the plane as a great big balance and the fulcrum point is the C/G, then I can see it as most of the Flite Metal is to the rear of the C/G making her a little more tail heavy in an already slightly tail heavy plane, but wow that much?

Grossman56

[farmflyer]

Gman I think that there can be a lot of difference in cg on some planes we had a discussion here about the cg on the dynam hellcat. With the same batteries added nose weight ranged from 1oz or less up to almost 3oz . If you figure this in with the added weight you put on behind the cg point I think it's possible. I think you're also on to something with the fulcrum theory. One tenth of an ounce one foot away from the balance point would require 1oz on the other side to balance out or am I thinking wrong.

[Lon]

Got to thinking, I wonder if they didn't manufacture two differently weighted fuses? I mean, the expense would be high , but its funny how this one balances up. I guess the only thing I can really chalk it up to is the Flite Metal, even though the weight of it is negligible. But then when painting a plane, you always recheck the C/G afterwards. If I consider the plane as a great big balance and the fulcrum point is the C/G, then I can see it as most of the Flite Metal is to the rear of the C/G making her a little more tail heavy in an already slightly tail heavy plane, but wow that much?

Grossman56

Maybe your tires are over inflated adding that extra weight ;)

[farmflyer]

That could be they may have winter air instead of summer air which could be much denser therefore heavier.

[Dewey H Lee]

You didn't by any chance have any old lead paint laying around did you.😏

[Grossman56]

Dang guys, your all correct!!
I guess I shouldn't have sat on the tail while I tried to balance it as well!!
OGM I guess (Old Guy Moment)

Grossman56

[Grossman56]

Gman I think that there can be a lot of difference in cg on some planes we had a discussion here about the cg on the dynam hellcat. With the same batteries added nose weight ranged from 1oz or less up to almost 3oz . If you figure this in with the added weight you put on behind the cg point I think it's possible. I think you're also on to something with the fulcrum theory. One tenth of an ounce one foot away from the balance point would require 1oz on the other side to balance out or am I thinking wrong.

No, that's just what I was thinking as I painted the stripes on the tail this morning, "how much is THIS going to add!!"

Grossman56

[Grossman56]

https://www.youtube.com/watch?v=69uz3_-FEM4

Maiden flight by Captain Mike!!

Grossman56

[Dewey H Lee]

That was great Dan. Did you go up next???

[Grossman56]

No, we had some L/G issues, nothing major, but Freewing L/G on the P 51 isn't the greates.

Grossman56

[Dewey H Lee]

Hope it didn't skin up little gal. She sure did shine.

[Grossman56]

No damage, but there are so many grubs screws in the L/G, that its a constant maintenance. Lon was saying its the same with his, I think Mike said after about three flights you have to check them all out to make sure they're tight

Grossman56