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Cox Engine of The Month
It's all about balance..
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It's all about balance..
Came across this pic when changing my avatar today.
First glance you'd think there's a spinner-hub.. but it's actually a Tee Dee-style spinner that's mounted. There's a little metal bushing that the spinner is sitting in.. and just by luck it happened to balance at that stage of construction.
This all changed though after finishing.. and I also opted for mounting the engine-cylinder horizontally; outboard-circle.
First glance you'd think there's a spinner-hub.. but it's actually a Tee Dee-style spinner that's mounted. There's a little metal bushing that the spinner is sitting in.. and just by luck it happened to balance at that stage of construction.
This all changed though after finishing.. and I also opted for mounting the engine-cylinder horizontally; outboard-circle.
Re: It's all about balance..
Did it stay like that after you cranked up that dryer
I too used to have a basement workshop in the previous house, but our current house has no basement floor at all. It would be nice to have one.
That picture got me thinking, theoretically the ideal "vertical" CoG position would be exactly at the line of the crankshaft. Then, of course the centerline of the aerodynamic drag should also be at the same line. I recall you already made a completely symmetrical model for inverted flying? Maybe symmetry would be beneficial for a speed model too. Less forces and moments fighting each other => less drag?
I too used to have a basement workshop in the previous house, but our current house has no basement floor at all. It would be nice to have one.
That picture got me thinking, theoretically the ideal "vertical" CoG position would be exactly at the line of the crankshaft. Then, of course the centerline of the aerodynamic drag should also be at the same line. I recall you already made a completely symmetrical model for inverted flying? Maybe symmetry would be beneficial for a speed model too. Less forces and moments fighting each other => less drag?
KariFS- Diamond Member
- Posts : 2032
Join date : 2014-10-10
Age : 52
Re: It's all about balance..
KariFS wrote:
That picture got me thinking, theoretically the ideal "vertical" CoG position would be exactly at the line of the crankshaft. Then, of course the centerline of the aerodynamic drag should also be at the same line. I recall you already made a completely symmetrical model for inverted flying? Maybe symmetry would be beneficial for a speed model too. Less forces and moments fighting each other => less drag?
Hey Kari, The closest I've come to a fully symmetrical airframe design is my little Voodoo (Phred's Phalt).. but even that does not have a 100% symmetrical airfoil. It uses an Ace foam-core which has slightly more camber to it's top surface. I imagine that Ace designed it this way to provide some lifting characteristics.. but then; they weren't in the business of designing C/L airplanes either. The Wooten Voodoo is close to 100% symmetrical I believe. I'd like to see Rusty build/fly one of those! With the stunt-skills he's acquired, I'll bet he'd have a ball with it!
Re: It's all about balance..
Sorry, I guess my memory doesn't serve me. I remember a symmetrical frame and somebody making a joke that the builder should add landing gear on the "top" side too You have published so many new ideas here that I automatically thought the symmetric plane was yours too.
Anyway, that Bear is a good and fast looking plane even without the paint
Anyway, that Bear is a good and fast looking plane even without the paint
KariFS- Diamond Member
- Posts : 2032
Join date : 2014-10-10
Age : 52
Re: It's all about balance..
KariFS wrote:Sorry, I guess my memory doesn't serve me. I remember a symmetrical frame and somebody making a joke that the builder should add landing gear on the "top" side too You have published so many new ideas here that I automatically thought the symmetric plane was yours too.
Anyway, that Bear is a good and fast looking plane even without the paint
Kari, no need to apologize. I do remember mentioning "Level-Louie".. a fella that used to fly with my dad, uncle and grandfather. He put landing gear on the topside of one of his C/L stunters. He was a timid flyer.. and was always worried about running out of fuel while inverted. I probably killed someone else's thread with that story..
Thanks TONS for your compliments on the Rare Bear. I took lots of photos during construction.. and then there was the hard-tank work. There's dozens of photos in that folder. The build pics are fun to look back on. I was super-focused then.. but haven't been able to get back there again.
Some of my favorites..
Early-on with a Babe Bee and lengthened wing-tips.
White-wash..
Gold belly-trim..
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