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Old Dec 27, 2012, 10:04 PM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
Joined Jan 2011
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Contest
BBCC 2 Piper PA-18 Super Cub Scratch Build payne9999

I was looking at the 24" wingspan Carbon Cub and really thinking about it but then realized $189.00 was a lot for a molded foam micro. I really wanted to build two cubs outfitted like tundra planes, one micro (25") and one larger (60"). So, I scaled down my Tritle Super Cub plans and used some rib layouts from another cub design (since I didn't trace the original parts).

Anyway, here are the specifications:

Wingspan: 25.5"
Servos: 3.1 gram Headsup RC
Motor: Projected to be a 180-250 size brushless
ESC: 10 amp Headsup RC
UC: Floats and tundra tires (configurable)
Color: Cream and red
Controls: Elevator, Rudder, Ailerons, Flaps and throttle

Right now it is just a pile of balsa. Cutting out the parts the old school way with Xerox copies a hot iron and an x-acto knife. The ribs will be 1/32", stringers etc. 1/16" paulownia wood some 1/16" ply and misc balsa.

I was going to post this on the micro and indoor section but that area seems like mostly ARF's. I seem to have an allergy to foam....gives me a rash to think about flying packing material around the sky.

Dave

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Last edited by payne9999; Mar 01, 2013 at 08:40 AM. Reason: Adding the Super Cub to a Balsa Conversion Contest
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Old Dec 27, 2012, 10:30 PM
I eat glue
Canada, NS, Yarmouth
Joined Jul 2006
3,532 Posts
Good start.
That's my plan with his current 60" Super Cub and J-3, only going up to 1/5 scale (84"). I really like how his designs are done and I think they are more easily made more "scale" than any current kit.
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Old Dec 28, 2012, 12:16 PM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
Joined Jan 2011
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Here is the fuselage framed up. So far the framed fuse is .3 ounces.

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Old Dec 28, 2012, 12:18 PM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
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Quote:
Originally Posted by baldguy View Post
Good start.
That's my plan with his current 60" Super Cub and J-3, only going up to 1/5 scale (84"). I really like how his designs are done and I think they are more easily made more "scale" than any current kit.
Did Pat release a 60" Super Cub? I knew he juat released his 60" J-3. I think my Tritle Super Cub is 53.5".

Dave
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Old Dec 28, 2012, 01:23 PM
Balsa&Tissue
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United States, OR, Beaverton
Joined Jan 2011
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Added the rest of the stringers and it weighs .38 ounces just shy of a Champ foamy micro fuse out of the box. So, given that it seems like it is on target. The motor and motor mount will be a little heavier but will have quite a bit more power.

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Old Dec 28, 2012, 04:02 PM
I eat glue
Canada, NS, Yarmouth
Joined Jul 2006
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Yep, he released a 60" Super Cub as well. I got both of his 60 inchers for Christmas. Going to modify my Super Cub into a Super Bear.
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Old Dec 30, 2012, 11:46 AM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
Joined Jan 2011
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Looking to save weight everywhere I can. My budget says I am at about 100 grams AUW. I want to be below 90g. Saved a few by going to a different battery and a few more by punching holes in parts.

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Old Dec 30, 2012, 12:11 PM
I eat glue
Canada, NS, Yarmouth
Joined Jul 2006
3,532 Posts
An old free flighter's trick is to slightly round the sticks a bit with sandpaper. Takes a little weight off.
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Old Dec 30, 2012, 02:36 PM
This is a fine fiddly business
Robert R's Avatar
United States, WA, Marysville
Joined May 2009
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Dave,
You are a really high output/high quality builder.
Re weight why not laminate the stab outlines?
Subscribed.
Roberf
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Old Dec 30, 2012, 03:24 PM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
Joined Jan 2011
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Quote:
Originally Posted by Robert R View Post
Dave,
You are a really high output/high quality builder.
Re weight why not laminate the stab outlines?
Subscribed.
Roberf
I am too lazy
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Old Dec 31, 2012, 07:22 PM
Balsa&Tissue
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United States, OR, Beaverton
Joined Jan 2011
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Working on the wing. The entire airframe minus covering, motor and battery is now at 53 grams. This weigh-in included the gear, tires and all the electronics and hardware. So far I am close to making the weight budget.

Dave

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Old Jan 01, 2013, 03:32 AM
This is a fine fiddly business
Robert R's Avatar
United States, WA, Marysville
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Quote:
Originally Posted by payne9999 View Post
I am too lazy
Fair enough but, somehow I doubt that lazy is a tag that fits you very well given a 4 day build log.
Robert
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Old Jan 01, 2013, 01:50 PM
Balsa&Tissue
payne9999's Avatar
United States, OR, Beaverton
Joined Jan 2011
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Quote:
Originally Posted by Robert R View Post
Fair enough but, somehow I doubt that lazy is a tag that fits you very well given a 4 day build log.
Robert
Robert,

My humor is to dry for most

Really I just hate making the forms and bending the wood. However, they are stronger and very light. My wing came out under budget at 9 grams so it will be OK but the bent and laminated tips would have been better overall.

Dave
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Old Jan 01, 2013, 09:23 PM
Balsa&Tissue
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United States, OR, Beaverton
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The wing is complete except for the flaps and ailerons.

The glue and knife are in the image for scale.
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Old Jan 01, 2013, 11:23 PM
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Joined Jan 2012
352 Posts
Looking really good Dave, You are making quite good use of your lightning holes! Do you find it hard to get the wing ribs sized well enough to get a good straight wing from hand cutting? that is one thing that has kept me from considering a scratch build. Not sure if I trust my patience enough to pull it off. Laser cut kits are such a crutch! Hard to get off of them.

That thing is really going to float along, cant wait to see the covering on it.

Ryan
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