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Old Oct 24, 2010, 07:30 AM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,684 Posts
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SPEEDSTER 78/40/26/20"+ 3.0/4,8M+ FOX 40/70"+ SWIFT S1 glider build.

Fox, Microglider

After creating many foam semi scala micro gliders, I decided to create a high performance version of one of those little beauties.

Mdm 1 Fox became the model to be built
It will be 100 Cm (38 ") span and with solid balsa wing.
I just tried building method on a version of Warhead 30 and it kicks ass.

Flew with Warhead Wednesday, in 30 two 38 knots wind on a 200 feet coast slope, and it was a small rocket, loops 300 feet high and had the same speed as Valenta Destiny , and Friday flew it in 16 knots on our inland slope, wery nice plane.

Started on the fuselage thursday evening, and here is the Fox until now.



Scratch build FOX, Part 1 (1 min 44 sec)
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Last edited by SpeedsterDEN; Oct 05, 2012 at 02:20 PM. Reason: Title change
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Old Oct 24, 2010, 12:51 PM
I'm a scallywag on the slope
Scurvy Dog's Avatar
Santa Maria Ca.
Joined Mar 2008
249 Posts
Wow! Is that what they call the lost foam technique?
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Old Oct 24, 2010, 01:51 PM
What's this thing do?
-3de-'s Avatar
United States, CA, Santa Cruz
Joined Sep 2010
103 Posts
Very cool! Did you use Acetone the remove the foam?
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Old Oct 24, 2010, 03:15 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,684 Posts
Quote:
Originally Posted by -3de- View Post
Very cool! Did you use Acetone the remove the foam?
I use cellulose thinner, but acetone would also have done the job.

Today I also have made the pushrod for the elevator, and done the canopy locking + made some fake markings of the rudder. + made some S7012 8,75 % airfoil Templates for the wing.

Tomorrow i will get the wood for the wing
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Old Oct 25, 2010, 04:37 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,684 Posts
Part 2

The days work: Wing build



Scratch build FOX, part 2 (1 min 9 sec)
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Old Oct 25, 2010, 04:39 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,684 Posts
Airfoil

The airfoil for the wing is S7012 8,75%
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Old Oct 25, 2010, 07:07 PM
What's this thing do?
-3de-'s Avatar
United States, CA, Santa Cruz
Joined Sep 2010
103 Posts
Man, very cool!! Really makes me want to carve up some foam myself..
Cant wait to see video of it flying!
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Old Oct 26, 2010, 03:27 AM
Dave Massongill
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yucaipa, ca
Joined Dec 2003
1,354 Posts
That thing looks sweet. Waiting for the video!!!
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Old Oct 27, 2010, 10:22 AM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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Part 3

The work of the day, now it look like a FOX



Scratch build FOX, part 3 (0 min 40 sec)
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Old Oct 27, 2010, 06:32 PM
What's this thing do?
-3de-'s Avatar
United States, CA, Santa Cruz
Joined Sep 2010
103 Posts
Looks great!!!!
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Old Oct 28, 2010, 12:39 AM
Stirring the pot
johannlochner's Avatar
Port Elizabeth South Africa
Joined Jun 2008
4,023 Posts
Good work there SpeedsterDEN!
You make it look so simple!
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Old Oct 28, 2010, 01:08 AM
Original Jackass
Alex May's Avatar
United States, CA, San Diego
Joined Feb 2008
1,934 Posts
Very cool! I would love to see more about your technique for getting an accurate airfoil on the solid balsa wings.
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Old Oct 28, 2010, 02:16 AM
If it can-it will!
cliffhanger's Avatar
Gower South Wales UK
Joined May 2007
2,075 Posts
Great build vids. Lovely workmanship.
As Johann says- you make it look so simple!

I see you use the excellent Hextronic 900 (9grs), I've used many of these for smaller models up to 60" (Swingers, Guppy, X-centric) with very few failures.
Great value servos-$2.69ea.!!

Looking forward to seeing the flying video- should be quite soon.
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Old Oct 28, 2010, 08:25 AM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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Quote:
Originally Posted by Alex May View Post
Very cool! I would love to see more about your technique for getting an accurate airfoil on the solid balsa wings.
I make some cardbord templates of the airfoil (4) and start with a small plane, then sanding paper on a flat piece of metal and just sand it to the right shape using the templates as a guide.
There is also sanded 1,5 mm washout in the wing.
For me its easy and fast, compare to making a ordinary wing.
(This is just the 2. wing that I have done in this metode)
And the balsa i use is medium hard, and it feels like a strong wing for a glider in that size. (1 meter).
And this is the size of the balsa that we can get in Denmark.

Just do it
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Old Oct 28, 2010, 08:32 AM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,684 Posts
Quote:
Originally Posted by cliffhanger View Post
Great build vids. Lovely workmanship.
As Johann says- you make it look so simple!

I see you use the excellent Hextronic 900 (9grs), I've used many of these for smaller models up to 60" (Swingers, Guppy, X-centric) with very few failures.
Great value servos-$2.69ea.!!

Looking forward to seeing the flying video- should be quite soon.
Yes great servo.
I have over 40 in servise now, all from wing aileron servo on a slow 3 meter Cirrus glider, to all the servos in electric planes, and nearly all my planes have one inside for thottle or tow release.
(I always have 10 of the 900 and 10 of the 5oo in stock for new projeckts)
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