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CraftyDan's Totally-Not-Cheating Scratch build Brush plane flight and build

Craftydan

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#1
Contest thread is here.

http://forum.flitetest.com/showthread.php?4445-CONTEST!!!!-Build-a-STOL-Bush-Plane


Here's my first (yes first) totally-not-cheating "scratch" build brush plane entry. (crazy ideas in play!)

A stretch DH beaver, flying around my living room. The video first (finish, before I get disqualified):


Complete with 'nessie quality video

and here she is:

P1010348.JPG

And she's tiny!

P1010343.JPG

Stats and build coming soon, for those eager to cheat a little ;)
 

Craftydan

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#2
. . . and for the build (apologies for the length) . . .

In any other contest, I'd hang my head in shame, however, our Benevolent Emperor Monkey (may he live forever) had bestowed on us the rules of:

Rules? There's no stink in rules.
So I give you: Craftydan's Totally-Not-Cheating STOL Stretch Night Vapor-Beaver hybrid.

Concept phase: I was flying my Night vapor around the aerodrome, contemplating the STOL contest, bemoaning that I had no motors/servos/escs/rx's to put together something, when it struck me -- this plane takes off and lands on a dime *AND* the wing layout is very traditional! I've built a *LOT* of paper models in past, including a J3 (about 3 in long) and a few others, and I had the patterns! The only concern was how close the motor and leading edge were -- needs to look good.

Need to turn this:
P1010241.JPG
into something like this:
P1010343.JPG

Initial design phase: Pulled up one of my favorite pattern sites I use, and took a look at my options. after a quick look I narrowed it down to:

J3 Cub (tried it, not quite right proportions)
Aeronca-C3 (ugly)
Lockheed Vega (pretty, but not really a brush plane)
Velie Monocoupe (Also not a brush plane, oh, and it's ugly too)
DeHavilland Beaver (ohhh . . . that's nice . . . but will it fit?)

Fortunately, I'd made one of these for my mother for VBS a couple of years ago-- survived the week, then got bad hangar rash back at her house.

P1010296.JPG

been here awaiting repair ever since -- well how does it line up:

P1010297.JPG

And the pattern colors match my recovered wings! Excellent! Well, except the fuse is way too short. Beauty of a paper model is the same with foam -- need more parts, just print more!

Development/construction phase: Printed them out and started with cutting out the tail:

P1010299.JPG

Scored and pre-bent the fuse then cut notches for the rear wing mount:

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Test fit and marked the point the control rods would exit the tail:

P1010303.JPG

Then cut notches for the rods, disconnected them from the control horns and fed them through:

P1010305.JPG

Now to start closing things up . . . normally I use Elmers clear glue -- takes a few hours to dry but can look seamless -- But who's got time for that?!?!? instead cheated using:

P1010308.JPG

Scrapbook tape squares (you don't even have to cut them or peal them off. How lazy is that?!?). Taped the tail together in several spots, cut and folded the nose, and taped it together:

P1010313.JPG

For the stretch, I just cut out another nose/cockpit pieces and sliced it square just in front of the window.

P1010311.JPG

cut a hole in the "firewall" for the gearbox, cut notches for the gear and battery cable, then tried a dry fit:

P1010318.JPG

Hmmm . . . seems I've miscalculated a bit. no worries! Hit print once more and it's up and running! Huzzah!

Taped on the final section, added a velcro patch behind the gear and ran a thin strip of packing tape trough the middle of the center wing spar and attached to each side.

Ran a few test flights, then broke the landing gear mount. (Dang!) A little string and CA, and it was back and flying!

So it's together, and really quick. I even "scratched" the vapor box a few times!

How does it fly? like a pig! It lumbers up slowly at full throttle, can't pick up speed and won't stop short like the vapor would (more massive). Flight time was also cut by 1/3. It still has good control authority, but much more sensitive to CG placement. But doesn't she look nice? As the Bixler would say "I like it!"

Stats:
AUW: 26g (yes, grams), up from the stock 16g
Engine: 4ohm, 6mm pager motor w/ 6:1 gearbox
Prop: GWS 4530 (4.5x3")
WOT thrust: something more than 16g, less than 26 :(
Battery: Efilght 1S 25C 70mah Lipo (a full 4g of mass!)

Modified wing/stabilizer coverings with Mylar and cellophane and added prop saver.

Re-enforced (read: repeatedly repaired) landing gear, landing gear mount, motor mount (in 3 places), Elevator hinge, Rudder hinge, and prop shaft -- I've been hard on this little guy.
 
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Craftydan

Hostage Taker of Quads
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#4
I prefer to call it my carrier aircraft arrestor system, but my wife insists on playing Chinese checkers on it ;)
 

Craftydan

Hostage Taker of Quads
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#10
Watch out Andre -- it's another hobby that'll suck you in (much cheaper, though).

Search "card modeling" to get into the whole community of sites (including boats, cars, buildings, action figures . . . ), but one of my favorite sites is www.fiddlersgreen.net.

Most of their models cost, but the plans are well vetted, the PDFs are unlocked (can be scaled and edited) and include both several repaints and unpainted (color your own). Their plans are simple, modestly detailed and fairly sturdy. Most of the simpler/smaller models can be knocked out in an evening. If I wanted to knock out the beaver the right way, it would take 2-3 evenings to do it all, but it'll do noting more than look nice. That doesn't mean it has to be -- the planes in the video on post 1 were mostly from this site fitted with a recycled airhog-ish brick system:

http://forum.flitetest.com/showthread.php?985-You-have-to-check-this-out!&p=9221
 
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Craftydan

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#11
BTW, thanks guys for the complents!

It was fun to slap something different together and see what helps/hurts the model.

Looks: +++

Perfomnace: not so much . . .
 

Craftydan

Hostage Taker of Quads
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#13
you buy access to several PDFs of the same model (different colors, options, or addons). They used ot have a small selectionthey gave away (for the longest time, the yellow J3 cub was free), but now I think you can pick 3 for free from a list.

Their "magic key" program is subscription based and they release 4-5 older models and maybe a new model to subscribers about once a week. What you get is random (site's choice), but mostly worth it if you're into the hobby.
 

Craftydan

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#15
Yeash. Just saw that. Seems the prices have gone up since the son took over the business.

Still say they're nice models, but not sure they're that nice . . .
 

colorex

Rotor Riot!
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#16
I might buy one or two models. I like the beaver quite a bit. They don't have my favorite though - the Beechcraft Baron G58. Would have bought that for $10 instantly.