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Sporty Little Plane - Blue fanfold foam scratch build

Old 10-06-2012, 11:40 PM
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mclarkson
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Default Sporty Little Plane - Blue fanfold foam scratch build

I actually started this build a couple of months ago and have worked on it on and off between other projects. This design is heavily influenced by/inspired by/stolen from StevensAero’s adorable SkyBoy model, and Dereck’s Very Short Plane.

I started out on a 3D package I use called modo, tweaking the design around until I liked the way it looked.


Here's a render of the final plan.


And my printed 'plans':

Last edited by mclarkson; 10-07-2012 at 12:06 AM.
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Old 10-06-2012, 11:41 PM
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A quick test fit:


I cut the wing out, then cut it in half and reglued it with some dihedral. The wing is under-cambered.



Last edited by mclarkson; 10-07-2012 at 12:06 AM.
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Old 10-06-2012, 11:42 PM
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//

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Old 10-06-2012, 11:43 PM
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I added two lengths of CF rod to the wing, in a channel I melted with an old soldering iron. The rods fit into a short piece of bent aluminum tubing to hold the dihedral angle.





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Old 10-06-2012, 11:47 PM
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Bamboo skewers run thru blocks of foam inside the fuselage to provide anchor points for the rubber bands. I've got a sort of 'monoblock' arrangement up front, made from two pieces of dense white foam from a box somewhere, and a single thickness of blue FFF to get the correct width. The motor is screwed to some aircraft ply which is Gorilla Glued to the front of the block.



Ailerons.


Gluing the horizontal stab in place, nice and level.

Last edited by mclarkson; 11-07-2012 at 08:50 PM.
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Old 10-06-2012, 11:49 PM
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The elevator is in two pieces. I bent a length of piano wire (0.032"?) into a wide 'U' shape, then epoxied it into holes in both halves to create a single elevator unit.





My LHS was out of small control horns, so I fabbed some up using mint-flavored tooth flossers.


Control surfaces mounted.
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Old 10-06-2012, 11:52 PM
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The wheels are rescued from a Tower Hobbies P-51. The gear is bent piano wire, run through some aluminum tubing and then epoxied to some thin plywood. The tubing keeps it from moving it two directions; the little bent bit on the end keeps it from moving in the third direction.



The plywood is glued beneath the wing, with some balsa glued on top to help hold everything in place.



The tail wheel is stolen from an old Air Hogs F-14.
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Old 10-06-2012, 11:55 PM
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The original monoblock got cut up quite a bit. Fortunately, I didn't glue it in place until the very end and could easily remove and mod it. The HURC 22A ESC sits to one side. The top was removed to make way for the battery, which Velcros to a piece of plywood.



The battery hatch stays in place with the help of a bit of tongue depressor and some rare earth magnets.



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Old 10-06-2012, 11:56 PM
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The pilot is a goggle-eyed rubber duck from a thrift store vending machine.



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Old 10-06-2012, 11:57 PM
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I was worried about the big horizontal stab being too floppy, so I epoxied a length of CF tube to the underside, running through the fuselage.

The pushrod guide tubes you see are made from the innards of some cheap ballpoint pens.

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Old 10-06-2012, 11:58 PM
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And with the addition of a few graphics, it's ready for its maiden flight. I'm going to leave it the blue of its original material, for the most part.


  • Emax CF2822 1.4oz, 1300kV outrunner brushless motor
  • HURC 22 Amp ESC
  • GWS EP 9050 propeller
  • (4x) Towerpro SG92R 9-gram high torque servos
  • R610 OrangeRx receiver
  • 800-860mAh LiPo
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Old 10-07-2012, 12:02 AM
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Here it is in the air, on its maiden flight this afternoon.

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Old 10-07-2012, 01:02 AM
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Great job that's a little cutie neat name also. I remember reading you bought a rubber duck in another thread I guess this must be it i like it.
So how did your scratch build fly it looks great in the air.
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Old 10-07-2012, 10:29 AM
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Thanks, Gramps. Yeah, I don't remember the thread but if I mentioned the rubber duck, then this is the plane. (The duck now has a name and an entire backstory. )

It seems to fly pretty darn nicely. It was gray and cold and gusty today, so I didn't fly too long or try anything fancy. Still trying to get the balance right, etc. I'll post some video of the maiden, though. Stay tuned.

Last edited by mclarkson; 10-07-2012 at 11:10 AM.
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Old 10-08-2012, 05:13 AM
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Here's the video of the maiden flights.


Last edited by mclarkson; 10-14-2012 at 08:36 AM.
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Old 10-08-2012, 01:36 PM
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Your dabbling teal flies real nice, and I see someone is all ready asking if you got plans for it.
Now there's a compliment when you get a request for plans.
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Old 10-08-2012, 05:23 PM
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road king 97
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Nice plane it reminds me of jurgens little bibe . joe
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Old 10-08-2012, 09:16 PM
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Thanks, guys.
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Old 10-09-2012, 06:36 AM
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I thought this guy really needed a windscreen and some instruments, so I knocked this little module together out of blue FFF, pop bottle plastic, thin balsa, some pins and a washer.
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Old 10-09-2012, 01:51 PM
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Originally Posted by mclarkson View Post
I thought this guy really needed a windscreen and some instruments, so I knocked this little module together out of blue FFF, pop bottle plastic, thin balsa, some pins and a washer.
When i was alot younger the wind did not bother me but now that iam old i dont ride anymore without a windshield . Nice wind screen Mclarkson .joe
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Old 10-14-2012, 08:37 AM
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Another flight. Haven't broken it yet!

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Old 10-17-2012, 06:31 PM
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I love it ... sort of reminds me of early monoplanes .......

Given me the urge to hack out something m'self !

There's nothing like the satisfaction of putting it all together and it FLIES !!

Nigel
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Old 10-17-2012, 10:05 PM
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Looks great! Congrats
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Old 10-18-2012, 12:35 AM
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Very nice looking little plane! Great job!
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Old 11-07-2012, 08:24 PM
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Have no idea how I missed this one. Guess it really is four years since I drew up, built and flew 'VSP' - which is still around and flying fine. Had her out last week, when Chicago's winds fell below 'breezy' (which translates as 'be careful not to stand up when walking outside ) and though one Futaba aileron servo has developed an overshoot to full stick movement at times, she still flies fine.

I prefer your wing shape too - but it's easier to achieve that in foam than balsa, especially when life's easier if you cut all your balsa wing ribs out to the same shape

Nigel - there is no bigger kick in aeromodelling than standing out on the runway, to make the first flight of a model that's uniquely yours from design to flight. Sure beats waving your credit card in a Chinese-ish direction for a big shiny box toy. What that new design is made of is immaterial - that its all yours is the big bit.

Dereck
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