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Old Apr 01, 2006, 07:14 PM
Glider guider
Speedo125's Avatar
United States, FL, Sun City Center
Joined Oct 2005
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Congratulations Chara! That's great news! My enlargements and copies are all made and ready for me to start cutting. Looking forward to your video.
Thom
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Old Apr 02, 2006, 01:27 PM
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chara's Avatar
Munich, Bavaria
Joined Dec 2004
1,265 Posts
Thanks a lot guys for your interest and your encouragement!!!

Here we go with the video footage. The quality is not the best - it is taken with my cheap digicam, but I hope you will like it and it will give a taste of how little Bipie romps through the air. ...If only the pilot was better

I coded it as wmv (4.8MB, 2:40 min) - hope that everyone is able to play it.

http://www.rcgroups.com/forums/showt...79#post5274086

greetings
chara
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Old Apr 02, 2006, 01:35 PM
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Munich, Bavaria
Joined Dec 2004
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Quote:
Originally Posted by Speedo125
Congratulations Chara! That's great news! My enlargements and copies are all made and ready for me to start cutting. Looking forward to your video.
Thom
Thom,
I'm glad you made it "to town" yesterday and printed out the drawings.
If you have any questions concerning the build (those drawings were everything else but detailed) I'll be happy to help you out with some close-up pics. I'll post the "official" plans as soon as I'm finished (in a couple of days).

greetings
chara
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Old Apr 02, 2006, 02:08 PM
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Munich, Bavaria
Joined Dec 2004
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Quote:
Originally Posted by windy city
chara... GREAT NEWS!
Congratulations Take a bow! proud Papa. It is so cute!!!
Maybe too soon to ask but. Does it fly as slow and relaxed as you hoped?
can't wait for the video.....
windy city
thanks windy city!
it was great fun designing, building and seeing her fly finally.
hope you have as much fun as I had If you decide to build your own.

Concerning your questin, I can say that it is capable of some realy slow and relaxed flying.
I would not hesitate to fly it indoors. For very slow flying it would be a good idea to make the upper ailerons movable and link them to the lower ones for increased controlability around the roll axis.

The video shows "Bipie" with "aerobatics" settings. To tame her down you only have to reduce maximal deflection of the control surfaces (mainly elevator - pitch control power is pretty high thanks to the large elevaor surface. so you may also cut it down in size a bit). Another method to tame her down is to shift the CG more forward, that will make her fly more stable.
I'm pretty sure you will also have a lot of fun with the "relaxed" settings.

greetings
chara
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Old Apr 02, 2006, 03:29 PM
UH-60 Blackhawk TI
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Michigan, United States
Joined Feb 2006
176 Posts
hey chara,

I just checked out your video footage. Very Cool. I love it. Nice job

Hawk
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Old Apr 02, 2006, 03:34 PM
UH-60 Blackhawk TI
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Michigan, United States
Joined Feb 2006
176 Posts
Chara,

One more thing, what motor and ESC are you running on this plane? Thanks.

Hawk
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Old Apr 02, 2006, 03:54 PM
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Munich, Bavaria
Joined Dec 2004
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Quote:
Originally Posted by hawk4932
Chara,

One more thing, what motor and ESC are you running on this plane? Thanks.

Hawk
Hey hawk,

the motor is a little brushless outrunner called "air power t590115" (www.t2m.fr).
weighs 32 gramm (about 1oz) and draws about 7A max, kV is 1050 rpm/V. I swing a 9x4.7 slow-fly prop from GWS.
The ESC is a "scorpio easy 12" (12A max, weighs around 12 gramm).
I'm very happy with that equipment. It is excellent quality for a low price! I payd around 60$ for that combo.
I don't know if these are available "overseas" but I'm sure any gear with similar specs (or better ) will do perfectly.

chara
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Old Apr 02, 2006, 03:54 PM
Registered User
Lake In The Hills, Il
Joined Jun 2005
359 Posts
chara,
First off Love the video!!!!! (Hats off to the camera person for just following that plane!)
Man that plane is so cute just sitting still, In flight it is downright GORGEOUS.
I love the way you have it setup now!

"hope you have as much fun as I had If you decide to build your own."
Well my mind has been made up for a few days already!!!
Just have a couple to finish first. But this is a MUST try!!!!!
Thanks for the time,
windy city
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Old Apr 02, 2006, 04:05 PM
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Munich, Bavaria
Joined Dec 2004
1,265 Posts
Quote:
Originally Posted by windy city
chara,
First off Love the video!!!!! (Hats off to the camera person for just following that plane!)
Man that plane is so cute just sitting still, In flight it is downright GORGEOUS.
I love the way you have it setup now!

"hope you have as much fun as I had If you decide to build your own."
Well my mind has been made up for a few days already!!!
Just have a couple to finish first. But this is a MUST try!!!!!
Thanks for the time,
windy city
You are welcome!
I will pass on the compliments to my "camera-women". She is always so patient with me and my hobby!

I'm glad you like it so much! Whenever you have finished yours it would be great to see some pics of Bipies little brother in this threat! Have fun!

chara
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Old Apr 02, 2006, 05:26 PM
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Lake In The Hills, Il
Joined Jun 2005
359 Posts
" I'll post the "official" plans as soon as I'm finished"
My quess is you will get to see a lot of Bipies little brothers!
thanks again,
windy
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Old Apr 03, 2006, 06:43 AM
gpw
“There’s no place like Foam”
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United States, LA, New Orleans
Joined Jul 2002
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WC , Yes , now we'll have to meet the whole family of bipies ...
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Old Apr 03, 2006, 07:47 AM
Glider guider
Speedo125's Avatar
United States, FL, Sun City Center
Joined Oct 2005
359 Posts
Very nice job! Congratulations to both of you. I've been looking for an excuse to wind another GoBrushless motor, and here it is! Chara, where did you finally set the CG and how much dihedral do you have built into those wings?
Thom
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Old Apr 03, 2006, 01:39 PM
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Munich, Bavaria
Joined Dec 2004
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Thom,
a good CG setting to start with is around the forward leading edge of the lower wing. depending on your preferences you can shift it further back or forward. I have it maybe 1-2cm further aft for more agility.
A good place to fit the battery in is between the inner strut and the fuselage.

Dihedral? hmmm... the plan was to have none at all, because I did not want it to interfere with my efforts to train some 3D maneuvers. However the lower wing ended up having slightly negative dihedral (maybe 2°?). This happened during thermal forming of the wing camber - remember, I used no carbon-spars on the wings (so be a bit careful with that heat-gun). so I gave the upper wing a bit of positive dihedral to compensate it. The picture will explain hopefully what I mean.
Normally I'd say around 2° of positive dihedral would do it if you like to fly with "self stabilizing" roll axis.

Chara
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Old Apr 03, 2006, 01:47 PM
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Munich, Bavaria
Joined Dec 2004
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there is another tipp I can give you.
Althogh the main fuse is very sturdy and can take a lot of crash landings, I found out that the "belly" may crack if you crash it a few times to often.
to stabilize that part, I drove a bamboo-skewer deep into the fuselage like shown in the picture. cut of the rest of the skewer.

-chara
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Old Apr 03, 2006, 02:15 PM
Glider guider
Speedo125's Avatar
United States, FL, Sun City Center
Joined Oct 2005
359 Posts
Thank you. That's just what I needed. I'll be adding wheels and pants per your drawing, so that is where I'll need to concentrate my toughness-Thom
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