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1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX LIMI... - 12/8/2012 4:55 AM   
skaliwag



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From: santa cruz, CA, USA
Status: offline 		Lets look and talk about 1/2A Bipes. And not ignore the connection of the upper wing to the rest of the airplane and the cabanes.

Just remember ... Real Airplanes have Round Engines and 2 WINGS



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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 9:07 AM   
ChicaWolverina


 

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Status: offline 		You're talking structure, and how overly simplified they are at this scale? And does anyone even bother to follow the original hidden secret of the BU-133's negative upper plane incidents... I think not?

"What's locked up in their star ships, this needs to be known!"

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 1:47 PM   
LittleRock


 

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Status: offline 		Define wing and round !!

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 2:53 PM   
MJD



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Status: offline 		If the cylinder is round, does that count?

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 3:39 PM   
combatpigg



Posts: 16925
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From: arlington, WA, USA
Status: online 		The greatest all around...semi scale RC plane I've ever flown was the Goldberg Ultimate. I believe the structure was purely 0-0-0 between both wings and the tail. The only deviation was a few degrees of right thrust to compensate for the 14 to 15 inch diameter props that many builders were using on it.
Full size span was 54 inches IIRC and I shrank it to about 24" [IIRC] for a 1/2A project. Built it as light as a feather, rigged it with Spiderline pull / pull linkages, HS55s all around, tiny battery & RX, cellophane covering...just did it as light as I possibly could.
IIRC it was 12 ozs RTF.
Tried it with .049-.061 glow..6x3 prop and it was pretty lively but nothing compared to the OS 1.20 powered version
Tried it .049 diesel with 7x3 prop [both TD & AME]..basically the same stuff
Tried Norvel .074 and 7x3 prop..much, much better. Still not enough for KE loops, but now it was capable of everything else in a big way. I still have both of the ones I built hanging in the rafters.
Another 1/2A bipe I built from pictures in a huge book I got at a used book store.
The 1930's DeHavilland Dragon Rapide. It has about 54 inches of span, built 0-0-0, powered with 2 fairly weak TDs fed from a single bladder that has feed lines coming out both ends. All pull / pull linkages, it turned out very light and slightly tail heavy. Not just tail heavy [still very controllable], but "bouncy" in choppy air. So I experimented by filling up the cabin / fuselage with lug nuts and this made it fly better. With both engines running it will hold altitude in KE flight and with 1 engine running it can be held nose up and tilted so that the lone engine running doesn't put it into a spin. 2 TDs running sound cool on this plane that flies like a pretty well powered glider. The engines are hung below the zero line of the plane's vertical CG and they needed considerable down thrust to compensate. I tested for the proper angle with the engines running and the model held at the wing tips loosely to feel for neutral / level AoA. I filed the backside of the Dubro engine mounts to acheive the proper angle. This plane sits in the rafters as well, waiting for another day...it's cellophane covering still looks OK.
I strongly recommend trying both projects if you are a modeler who likes little challenges without spending too much money or time.


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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 4:11 PM   
skaliwag



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Status: offline 		MJD. Multiple round cylinders and a con rod that looks like a spider

LittleRock ....Wings .... a couple of boards. One over the pilots head and one under his butt.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/8/2012 8:56 PM   
gcb



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Status: offline 		Here are a couple of Little Bipes:

George


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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 12:29 AM   
MJD



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Status: offline 		Looks like a Scientific something-or-other..?

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 1:51 AM   
skaliwag



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Status: offline 		The original Skaliwag .... When a K was a C, or a C was a K...
Left to right. PAW .061, PAW .049, Norvel .049 with a diesel head.

Edit ... Tried to crop the picture.

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< Message edited by skaliwag -- 12/9/2012 2:48 AM >

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 3:16 AM   
skaliwag



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Status: offline 		Reply to post #2.

Can you post some links to the BU-133 principle you mentioned. (I do it the other way, positive on top as per Joe Wagner's Dakota)

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 4:10 AM   
combatpigg



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Status: online 		That's a great looking fleet GCB & Skaliwag...! They look pretty tiny, too..... ...[but not too tiny, you can never get too tiny.]


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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 4:12 AM   
skaliwag



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Status: offline 		Bipes Rock, Roll and Rule.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 3:40 PM   
BobHH



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Status: offline 		Oh, I have a bipe!! Here is my Christy bipe with Tee Dee .010.

Bob Harris

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 3:45 PM   
skaliwag



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Status: offline 		Pure Aero P**n.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/9/2012 6:55 PM   
ffkiwi


 

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quote:

ORIGINAL: BobHH

Oh, I have a bipe!! Here is my Christy bipe with Tee Dee .010.

Bob Harris



Where do you get hold of a plan for this little cutie?

ChrisM
'ffkiwi'

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 3:12 AM   
skaliwag



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Status: offline 		Another Bipe. This one from the now no longer in production Early R/C.. The Schoolgirl ..... Do you have a better picture Bob?

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 3:38 AM   
vauxhall


 

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Status: offline 		This C/L Tiny Tot was a bit of fun a couple of years ago, Norvel .061.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 4:43 AM   
exocet-RCU


 

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Status: offline 		Both the Christy and the School Girl are REALLY cute! I think I see a couple projects for S.M.A.L.L. 2013.

Tim

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 5:13 AM   
skaliwag



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Status: offline 		Perfect... Got the tiny airplane juices pumping ... Woooh Hooooo.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 1:14 PM   
BobHH



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Status: offline 		Steve, here is a pic of mine at the VRCS flying. This one flew with a Cox Medallion and throttle sleeve. A great little bipe.

Bob Harris

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 9:06 PM   
gcb



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quote:

ORIGINAL: MJD

Looks like a Scientific something-or-other..?

Would you believe...Scientific "Little Bipe"?

George

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 11:25 PM   
BobHH



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Status: offline 		And lets not forget the Flipper!!! Here's mine!!

Bob Harris




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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/10/2012 11:28 PM   
MJD



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quote:

ORIGINAL: gcb

Would you believe...Scientific ''Little Bipe''?

George


LOL! Now there's an appropriate name. I probably could have found it in the AHC ad in an old mag.

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/11/2012 12:35 AM   
skaliwag



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Status: offline 		Don't forget this one. A beat up Dakota with a wore out Wen Mac

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RE: 1/2A Biplanes.*** LIMIT***. .010 to .049? *** MAXX ... - 12/11/2012 1:34 AM   
vauxhall


 

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Status: offline 		Did someone say "Dakota". Heres my Testors/McCoy build. Flew it just the other day, bags of low tech fun. Flick and toss.

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