Tag Archives: rc airplane

Scratch Builds

Have not been posting here in a while, weather is changing and not as many opportunities to fly, so don’t do as much building when I cant maiden (crash) the creations.

Here are a few over the last few weeks:

My rendition of the Balsa Plan called the wot4 or watt4. Scaled the drawing down to 45%. High wing but fully symmetrical so wanted to see what it can do. No rudder servo, 1540kv motor, 7×5 prop.

2016-10-28-11-31-30

 

 

FrankenPlane: Wings are from a smashed Katana, elevator from a smashed Bravado, fuse and tail hot cut foam. Powered by a 36series 1500kv motor, should be interesting to see if it will fly!

2016-10-28-11-30-38

 

 

Profile plane, modelled after the electrifly 300 – this flew very well!

2016-09-22-20-35-48

WTF Returns….

Since the destruction of planes seems to have become common these last few trips to the field, I have an abundance of left over pieces from smashed planes….

The three contraptions below consist of parts from the following planes I have crashed….
Corsair
Gremlin
Storch
Guinea
Wingnetic
Ugly Stick
Slow Stick

Will they Fly????

Check out the Video of these:

 

2016-06-01 18.22.51 2016-06-01 18.22.39 2016-06-01 21.00.50 2016-06-01 21.00.42

2016-06-01 21.00.202016-06-01 21.00.32

 

2016-06-03 19.53.45

2016-06-03 19.53.34 2016-06-03 19.53.23

2016-06-03 19.53.16

LAR #4 Slo Wing

The Krazie Wing from an earlier build remains an interest, and since I had an armin style wing, with a slight dihedral, thought it may be worth the time to see if the krazie wing principle could transfer to this type of airfoil.

Powered by a sunnysky 750 spinning a 13×8 prop, it seem to have enough thrust to reach the moon! I’m using CG from the previous wing, however this feels extremely nose heavy. Will see if survives its first test flight!

2016-04-23 17.40.24

2016-04-23 17.40.39

2016-04-23 17.41.28

 

Small Wing

Based on the FT designed $tree foamboard wing, this is a close design but built from Gray Depron, cover in laminate for strength, with no spars. Running a 3200 kv emax.

Flys extremely well! One thing I am learning with these wings is that elevens need a slight positive up angle, not coplanar with the wing. However, that in turn drives the craft up when under full throttle. To get around that, a normal mix should be created that drives elevens down when over 50% throttle is reached.

 

2016-04-15 19.15.30 2016-04-15 19.15.10 2016-04-15 19.15.00 2016-04-14 16.52.57

SkyRay

Closely based on the StingRay as designed by dz1sfb, this simple wing is made from a mix of grey depron & MPF, covered with laminating material on the lower surface. (34″ wingspan)

The original has a lower fuse out of layers of foam, I just hot cut some 2″ foam as a solid block, eyeballing the motor angle.

Since I want to see if this design actually flys well, I used a very small 1700kv Blue Wonder stick type motor, with an 8×4 very cheap prop held on a prop saver.

CG is exceptionally odd and important for a wing so I read, so spent some time getting this right. (I Hope!) Ideally it should be powered by a 3s, but since I really want to keep this light to see if it can survive a maiden, I opted for a 2s1300.

There was too much wind to fly this morn, so all in, the complete build of this wing including waiting for the GG glue to dry is only about 4 hours total.

2016-04-09 16.52.58

2016-04-09 16.52.47

2016-04-09 16.52.39

2016-04-09 16.52.35

 

LAR #1

Welcome to my new series, no more WTF XX, it will now be the:    LAR XXX Series!

Looks About Right #1

Noticed the scratch built sBach full fuse, so decided to make a version.

Had a hot cut wing laying around from when I was trying out cutting a tapered wing, so that became the base unit, with all other dimensions based on this wing.

This thing balances nicely with only a 3s 1300, and the motor is an old 28 series 1200kv I had on a tricopter – prop is very small for me, 8×4.5, but seems to hold the LAR #1 in the air at only half throttle, so should be interesting to fly.

2016-04-06 20.36.17 2016-04-06 20.36.10 2016-04-07 11.24.44 2016-04-07 11.24.50 2016-04-07 11.25.07

 

Bit&Pieces Boredom

** Update: Decided to finish this crazy contraption – new pictures added and its now ready for its first flight… fingers Crossed!

The wind this weekend is too high to fly, and its Sunday and I’m bored to tears, so thought I would use up bits&pieces of plane parts and assorted crap that should really be in the garbage…

This contraption is not yet finished, but since I may scrap it rather than complete it, posting it for the heck of it!

Starting with a 39″ wing I had hot cut for the failed fugly jet bit, I needed a fuse to put it in. I have always liked the magnum reloaded scratchbuilt out of Germany so thought I would loosely recreate at least the fuse…

Fortunately I had a 2′ section of blue foam kicking around that was too short for a wing, so away we we go! Or so I thought… My hot cut bow is no good for profile cutting so I needed a quick solution. As you can see from the pic, I took some wire, wrapped it around a dowel just big enough not to fit thru the hole in my work table, tied the opposite end to a turnbuckle that I attached to the rafter, grabbed a variable power supply, and Boom!, bobs your uncle!

2016-04-04 19.15.25 2016-04-04 19.15.35

 

hot wire

For the wing ends, that look ridiculous and stick up, I just used some 6mm deprom, and the same for the tail feathers. Paint was so olm mixed dried stuff that was long over due for the trash, and the pilot is out of an old balsa kit.

Not sure if I will ever add motor, but at the least, this mess killed a few hours this morn!2016-04-03 14.14.12 2016-04-03 14.14.23

 

 

WTF Four

Well, WTF 3 was a complete disaster. It was a clark airfoil and it looks as if I set the wing incidence too high. This resulted in its complete destruction on maiden!

Introducing the WTF 4 – This one I’ve gone back to the sipkil airfoil, mid mounted, at 40″ span. Slight changes to the rudder and elevator to help overall balance.

This one had to be designed while it was being built, as a motor from the Durafly Tundra is powering this one. I chose this motor as its base design is to use a 12×6 prop. It is much heavier than other 28 series motors I have tried, but accounting for this during the build/design stage ensured CG @ 1/4 was easily achievable. As typical for this design, a 3s 2200 lipo powers the plane.

The wing is hotwired from expanded foam, body is built from the 6mm grey depron (much less ridged than the white depron!) and tail section from 9mm depron.

May it fly as well as the WTF 2.

2016-03-29 18.01.51 2016-03-29 17.31.16 2016-03-29 17.31.31 2016-03-29 17.31.25 2016-03-31 19.41.26 2016-03-31 19.41.48 2016-03-31 19.42.40 2016-03-31 19.42.02