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Jan 27, 2014, 09:23 AM
"Some do, some don't"
old_coastie's Avatar

Oh Heck Yeah!!!!


+1 +1 +1......

Video looks great just the way it is... (played full screen).....

I was extremely impressed with the flight characteristics, You were flying this bird exactly the way I like to fly my planes (just that you are better at it than I am)...

Thank you so much for sharing...


Ok this could be next up on build table, have a couple of UM bricks that I could use for this...

Want to have this ready for EFEST (I Hope)

Anyway, any special insights on the build???

Is this a straight 50% reduction of the plans?????


Solid work.....


Mark R.
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Jan 27, 2014, 09:53 AM
Flying...Pushing Air Down
sr71fan's Avatar
Mark,

Glad you like it. I use "Tile Print" to scale my models up or down. I just tell it what span I want. Don't really know what the plans call for. If the span is 24 inches, then, yes, it is 50%.

One thing you might keep in mind... keep everything as far forward as you can so you won't have to add nose weight like I did.

Gary
Jan 27, 2014, 11:45 AM
"Some do, some don't"
old_coastie's Avatar
Gary,

Keeping everything forward applies to all of the Bipie's, I HATE DEAD WEIGHT.... Just bugs the heck out of me....

When I read thru the thread that was a common observation, to counteract I added 10 mm to nose ahead of LE wing (didn't want to mess up the "desired" CG), that and I didn't decide on servo location until after I had the airframe dry fitted, then started taping on servos and electronics. An extra step or two that took some time but was worth it I think, no dead weight required (although my aileron servos are 9 gm versions as opposed to 5 gr because I needed that extra weight up forward...)

Thanks for replying...

Mark R.
Jan 28, 2014, 02:27 AM
Flying...Pushing Air Down
sr71fan's Avatar

Aspect Ratio Fixed (on the video)


Mark,

I thought I had the brick and battery far enough forward. I'll lengthen the nose on the next one. Thanks!

Correct aspect ratio on the same video...

Gary

Micro Bipie Indoors Correct A/R (2 min 19 sec)
Jan 28, 2014, 08:18 AM
Registered User
egicar's Avatar
Quote:
Originally Posted by sr71fan View Post
Mark,

I scaled down the plans to 12 inches span, used 3mm Cellfoam from Hobby Lobby (the craft store), and put Vapor gear on it. 3-channel with undercamber, dihedral on top wing, and no ailerons. I had to add some noseweight; it's now at 23.8 grams, and I'm using a 140 battery. I was surprised the Vapor powerplant flies it so well.

Gary
Great idea, Gary!!!

The full scale one was my first DIY plane
Now I'm working on a scaled down one (about 300mm w.s.) as your.
Mine will weigh about 45g, because I'll use:
- a Orange R415 micro receiver, 2g
- 2 x HK 1.7g linear servo (rudder and elevator)
- a HK-5320 Ultra-Micro Digital Servo 1.7g for 4 ailerons
- a 7A ESC, 7g
- a micro brushless motor 3000KV, 3g
- LiPo Nanotech 2S 120mAh, 8,5g

ASAP some photos.

Ciao,
Egidio
Jan 28, 2014, 07:28 PM
Registered User
ggrimley's Avatar
Egidio... Where did you find a 3 gram motor??? Do you need a magnifying glass to see it???
Jan 29, 2014, 04:15 AM
Registered User
egicar's Avatar
Quote:
Originally Posted by ggrimley View Post
Egidio... Where did you find a 3 gram motor??? Do you need a magnifying glass to see it???
It's really a little motor, but I can see it without a magnifying glass
AP-03
It's a 7000KV, not a 3000KV as I wrote

Ciao,
Egidio
Jan 30, 2014, 02:18 AM
Registered User
egicar's Avatar
I had to change my project about the motor: too small and too KV.
I mounted a Turnigy 2000KV.
Here are some pics
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Jan 30, 2014, 02:43 AM
Registered User
egicar's Avatar

"Bipie" - Profile depron biplane cartoon style


I have to connect the AIL servo with ailerons and the little baby will fly 😊
Jan 30, 2014, 08:54 AM
"Some do, some don't"
old_coastie's Avatar
First of All..... Whoooo Hooooo!!! Nice Job....

Beautiful Plane, really, a perfect example of keep it simple....

When you get time would really like some close up shots of well, just about everything...

I eagerly await your flight report... Best of Luck....

Mark R.

old_coastie


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