Beeza

My Feedback: (1)

Hi Guys,
I haven't been on for about 9 months now. I like to build 1/2 A planes from plans
over the winter. Lately I've been looking for vintage plans. Can someone direct
me to a site that has these plans? I've already checked out Dave Fritzke's plans site.

I have been thinking about building a 1/2-sized Bushwacker (Mark's Models) but would
like to see some earlier 1950s or so choices too.

Thanks much,
Beeza

BTWdo any of you remember the little books of plansFF and C/Lthat
America's Hobby Center in NYC used to sell in the 60s? Would anybody have
one of those they'd be willing to sell or loan out?

Beeza

My Feedback: (1)

I forgot to mention that I build for 1/2A R/C.
Thanks again.
Beeza

longdan

If you go to the scratch building/CAD forum, there are links to free plans at the top of the page.
One site that has a LOT of plans is
http://plans.aerofred.com/

soarrich

My Feedback: (98)

That would be cool. It was a .20 size at 72", what would a 1/2a be? 48"? You going to do a wooden muffler too?

Beeza

My Feedback: (1)

The 1/2 size should give me 277 sq in wing area and approx 35" wing span.
No wooden mufflers though. I once owned the kit and couldn't believe
how complete it was-including the muffler you build yourself, not to
mention how much wood there was too.

I didn't fly often back then, so I sold the kit to someone who cold have
used it more.

Beeza

boberos

If you like DeBolt (DMECO) designs fro the 50's to 70's, Fran P. in Tonawanda sells all DeBolt's original Plans including 1/2 A very reasonably.
Bob

gcb

Yup! I had the CL one and engine one in the late fifties. I loaned them out...never saw them again. []

George

Edit: Apologies. I think mine were by Berkeley, not AHC.

Free Bird

Bob, do you have any contact info?

FB

BMatthews

Since the original Bushwacker was more of a U2 sort of design being up to 72 inches a wingspan more in keeping with the original idea would be more in the 42 to 45 inch span range. Kept light it would retain a lot of graceful agility. And for 1/2A I'd ditch the landing gear as unwanted weight. Being a shoulder wing it would handlaunch and belly land with aplomb.

Beeza

My Feedback: (1)

OKthanks to all of you for the info on the plans available. Fred's site is remerkable. I will check on the others as well.

I got the Bushwacker plans scaled down for 1/2A power in different sizes-the 2 most probable are:

1- 54" wingspan and 337 sq in wing area

2- 49" wingspan and 275 sq in wing area

To me, #2 seems like the best choice for my Cox Black Widow or a throttled Medallion .049.

Any comments on this?

The odd thing is that on choice #2, the stab area is 37.5 sq in, where on my Papillon plans, wing area is 275
sq in but the stab is approx 49 sq in. My question here isdo I need to enlarge the stab on the Bushwacker??

Final question is controls. I wanted to use 2 channels, one for the elevator, but am I better off using the other
for rudder or ailerons? (I may try a 3rd channel on the throttled mdeallion)

Thanks again for your input. I value all opinions!
Beeza

soarrich

My Feedback: (98)

I think you would want ailerons and elevator, to use rudder and elevator you'd have to add a lot of diehedral, it wouldn't look to much like a Bushwacker.

BMatthews

Definetly ailerons and elevator only. It's just that sort of plane. And I also vote for size #2 as it not only has "enough" wing area but it'll also build up to a lighter model.

I don't recall what it used for an airfoil on the original but go with something of very low camber like in the 1 to 1.5% range and around 8 to 8% at most thick to maximize the speed aspect. Which airfoil you use will depend on the construction method. Pick something very basic that will work with the method you plan on using. No fancy cusp shapes or critical curves that are beyond human ability to replicate with hand tools.

Looking at Profili options that suggest themselves are the MH64. Another called the MM1608 looks pretty good other than the polars for the lower speeds. It would work well but may require an upper surface turbulator to remove some mushiness when trying to glide slowly. The Xfoil polars for the MH64 look a little cleaner but again you may want to try an upper surface turbulator. There's likely other options but those two jumped out at me as good options.

injunnut1

Penn Valley Hobby Center sells all of these neat old, once more available repro books, check out this link: http://www.pennvalleyhobbycenter.com...craftbooks.htm ... I just ordered and received several of these "Winston Publication" copies, I got the CL and FF Plan books and also the Glo-Engine Handbook. These books were offered free from "America's Hobby Center" along with about any mail-in-order to AHC way back in the fifties.
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