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Old Feb 11, 2003, 09:42 PM
Heli Bouncer
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Fokker B-I ds scratch-build

Hi all,

I was going to wait 'till I had it more assembled, but here's another little scale bipe from early WWI. It's the Austria-Hungarian observation plane that Fokker made a small number of in 1915. It's scaled up from some downloaded .10 cent plans I found, 35" WS and I'm hoping for around 8 oz, with a geared m100 drive and 7 cell 370 nimhs.

I really can't find much history on it, 'cept that it was a two seater, had the basic fuselage structure of the E-I, maybe a little lengthened, and it has a generous wing area as a bipe, which floats my cake well. My 1 1/2 Strutter has a lot of wing area, despite getting a little weighty, it floats around quite gently, so I'm trying to make up for gained ounces by building in lightness while assembling this little ship.

Looee
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Old Feb 11, 2003, 09:53 PM
Heli Bouncer
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More..

I'm into my third day of building since printing and tiling together the plans last week, so I'm making slow progress. I found out that this plane was a wing warper for roll control, I toyed with the thought of doing it, but my drawings for the mechanism ran afoul of my lower wing mounting, so extra dihedral.

One thing that suprised me, was that the represented rudder size on the plan is very close to the full scales size. It looked way too big, compared to the dimunitive rudder the E series Fokkers sported. I originally shrunk it, then restored its size after finding a grainy photo on the web of this plane.
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Old Feb 12, 2003, 07:30 PM
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Martin Irvine's Avatar
Canada, ON, Kingston
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The B.I was used as a light reconnaisance plane and then as a trainer by the Austrians. It was a pleasant airplane to fly. The wingspan was 11.7m, area 26 sq. m (M7 aircraft), or 28sq. m. (M10 version). Friedrich Hefty, (5 confirmed, 4 unconfirmed victories), flew 03.09 with Flik 12 in the spring of 1916. It was clear doped linen with grey engine cowlings and a red, (top half) and white, (bottom half), rudder. Elevators were each 1/2 red, (outer half), and white. The outer 40%of each upper wing panel was split into equal white/red/white stripes, (top and bottom). The bottom wing had the same striped markings on its lower surface only.

Cheers,

Martin
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Old Feb 13, 2003, 02:07 PM
Heli Bouncer
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Hi Martin,

Thanks for the color scheme information, as the plans text is faint and unlegible. I do have this .JPG image I found.
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Old Feb 17, 2003, 06:53 AM
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FOKKER B

Interesting choice for a project. Should be a winner. Keep us up to date please. Give up more pics too please. Good Luck. SCALE RULES! martys
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Old Feb 17, 2003, 06:49 PM
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More build picts

I'm Baackk!!

Here is some more of the structure, in the "bones". I spent some time making the landing gear "A" arms independently supspended, since most of the LG is C/F rod splinters and hard balsa, it should hold up fine. The cowling is foamcore covered with printer colored paper, looks pretty good and is light. The whole frame is exactly 1.5 oz., uncovered as you see it here. I can't wait to start rigging and detailing it out

Thanks Marty, I hope to have some more photo's as it progresses.

Looee
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Old Feb 17, 2003, 06:56 PM
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More images..

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Old Feb 17, 2003, 07:02 PM
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Ralph A. D'Amelio's Avatar
United States, MA, Chelmsford
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lOOKS AWESOME Can you show a little more detail on your cabane structs. I assume they are CF rods.
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Old Feb 17, 2003, 07:18 PM
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Hi Ralph,

Thank you.

Believe it or not, it just black Marks-a-Lot stained 1/16" x 1/8" spruce sticks, with the edges rounded. I have to refocus my Aiptek Pencam anyway, (sorry about the fuzzies).

I'll get some better images, I'd like to show my bungied swing arms on the underside also. The wheels are made of 1/8" foamcore with some C/F splinter "spokes" for side loads, they'll also get some paper cones over the sides here soon.

Looee
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Old Feb 26, 2003, 12:43 AM
Heli Bouncer
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No piccies, but it flew!

Hi all

The Fokker is a success. It came out at about 6.7 oz. AUW. I've got it covered with tissue and some stained dope for the raw linen look. I used red and white tissue for the Austrian insignias.

I'm not used to the control that a full flying stab has, so I'm going to have to recut the stab control horn. The first flight was a bit of a roller coaster ride. But it ROG'd fine, needed some right trim. I'm dashed as to why this plane weighs so much less than my other three, I certainly didn't skimp on the LG structure and the front end, and I used nearly the same gear. I did make use of one of my IPS "A" drive gearsets that was mounted on a J250 motor. It's now being spun by a M100 for a weight and amp reduction I like.

I'll get some static and flight pictures tomorrow.

It's a very docile and fun plane to fly, if you don't use too much elevator.

Looee
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Old Feb 26, 2003, 04:05 PM
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Here the images

some shots from todays flights
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Old Feb 26, 2003, 04:07 PM
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More piccies

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Old Feb 26, 2003, 04:09 PM
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I'll get some detail pictures soon, I'm going to fly until the rain starts later today.

Looee
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Old Feb 26, 2003, 05:25 PM
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Looee,
Another lovely little model, not that I expected any less.
Found some scale drawings for the Arrowscout the other day.

Pete
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Old Feb 26, 2003, 06:08 PM
Heli Bouncer
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Quote:
Found some scale drawings for the Arrowscout the other day.
Thanks Pete, I'll get some close ups of the rigging and stuff later today, I've got to cut out some windscreens and repair the tail skid, hooked a big dandilion and ripped it free.

Thanks for remembering the Arrowscout, I'm looking forward to it.

Looee
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