Tag Archives: rc aircraft

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!

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The Pitt-Tastic….

Ok, so I started with the plans from an old balsa FSW called the spintastic…. It was forward swept with a profile fuse and a rudder. This is an exceptionally odd design so thought I would try it.

However, once I had the wing built I noticed an old HK pitts biplane that I had badly smashed many months ago…

It had a partly intact fuse, no wings, busted elevator, and crushed motor shaft, and really should have just been scrapped.

Being over tired, using this pitts with the spintastic wing seemed like an awesome idea!

Sooo, I cut the fuse apart to take the FSW at midpoint, repaired the motor mount, elevator etc, and glued it all together!

I really need to stop building planes late at night!

Building the wing from 2″ pink insulation:

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Gluing it all into one and using packing tape rather than laminate:

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Scratchbuilt FunJet

After totally destroying a multiplex funjet, I used what was left of it to take measurements.

The hardest part of this build was creating and hot cutting the wings.  Each wing is built by using symmetrical airfoils that scale down in both cord and thickness as they move toward the wing tip.

Once glued, a carbon spar was laid in for strength. The fuse is simple, just 2″ foam block hot wired to shape. As this foam will not take an impact,  I heated a steel rod, and drove it perfectly center down the length of the fuse. This permitted the insertion of a square carbon fiber rod, that will hopefully keep the fuse from breaking on a nose impact.

Power system is currently a Greyson super megajet motor, 6×4 prop and a 40 amp esc.

Maiden will be interesting!

Hot Wire Cut Wings:

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Glue up of the wings:

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Adding the Spar:

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Done!

scratchbuilt funjet
scratchbuilt funjet
scratchbuilt funjet
scratchbuilt funjet
FunJet Scratchbuild
FunJet Scratchbuild

 

 

 

 

 

 

 

 

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:

 

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LAR Twin Bruiser

I have many motors from the quad days, and decided to build something to see if I can make use of some of them. To start, I have used the original DJI 950kv motors that were used from 8″ to 10″ 2016-05-07 20.02.01 2016-05-10 19.25.38 2016-05-10 19.25.50 2016-05-10 19.26.07Started with a hot cut wing, 48″ in length, but only a cord of 8″.

Noticed the ft cruiser is close to what I want for body and wing look, so borrowing heavily from that design.

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LAR Plank

Continuing with the flat plank style, here is a design with a fully symmetrical airfoil, and the LE cut at each corner to prevent tip stall.

Apparently the winglets are not required with the this cut, however, decided to play it safe.

Running an 1100kv motor and an 11″ prop, this design flies like a dream.

*Update – got caught in some wind, drove the plank into a building… this is No More!

 

2016-05-05 17.06.36

Corsair Profile

The gull wing design is interesting, but I have no clue as to what advantage it is supposed to provide…

That said, thought why not scratch build one!. Here  is a 46″ wing, built a jig to cut the angles with a hot wire, using the LAR principle, so don’t know what the actually degrees are.

Since this was a build that came together with no real thought, the awful paint job is appropriate.

Powered by a Park 450, a 9×6 prop and a 40a esc, the maiden should be interesting…..

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