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Old Mar 26, 2011, 05:25 PM
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Hot wire wing cores

Hey folks,

Some mighty talented individuals here doing some neat stuff. But I'm
surprised I don't see any hot wire wings being used on any of these
works of art and aeronautical engineering. Anyone play with hot wire
cutters and come up with any neat wings for small planes? I think it
would be neat if I could carve a hotwire wing from 1/2 inch bluecore
for small planes. Warm regards, Jim
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Old Mar 26, 2011, 05:57 PM
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Just call me crash for short
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You'll catch someone here building a wing cut with hot wire from time to time. as for my own self, don't have a HWC yet but when I do get one together I'll be going for something like this, http://www.rcgroups.com/forums/attac...mentid=3697527 to experiment with.
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Old Mar 26, 2011, 07:33 PM
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Slope flyers, combat fliers make their own wings.
Make a bow
hook to
Brushed ESC
controlled by
Receiver, Transmitter
powered by
Battery, power supply
My favorite youtube on foam core cutting
Hotwire demonstration (3 min 30 sec)

catchy tune too!
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Old Mar 27, 2011, 01:51 PM
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Hi Rick,

OK, you have peaked my curiosity. Can you point me toward instructions or video on
cutting wings with lipo and esc? I don't want to fry any gear, but it would be neat if
I found I already had the necessary gear. Thanks! Warm regards, Jim
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Old Mar 27, 2011, 03:11 PM
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Quote:
Originally Posted by Jim Hatch View Post
Hi Rick,

OK, you have peaked my curiosity. Can you point me toward instructions or video on
cutting wings with lipo and esc? I don't want to fry any gear, but it would be neat if
I found I already had the necessary gear. Thanks! Warm regards, Jim
you wont fry any thing. i still use my old fm radio ,Rx and 30 amp esc[brushed] just make a bow outta pvc or whatever,that has slight flex..
, thread in eyebolts to ends ,string your wire semi tuant, [i use E-strings] hook up your long leadwire [ electrical 6 ft or so] to the esc ,[like your hooking up a brushed motor],the other end of this wire will have small alligator clips fastened to the ends. clip these onto the furthest end of your wired bow!
now power up your tx like normal. making sure your throttle and trim are DOWN! plug in your batt. ...and experiment with the heat..
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Old Mar 28, 2011, 05:41 AM
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Just note if your ESC supports Lipos

You could use a wattmeter between the battery and esc to monitor battery drain.
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Old Mar 28, 2011, 09:39 AM
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ive built about 8 hotwire planes with only 1 failing to fly the others were great fliers i use a car battery charger and a hot wire bow made from timber using fishing wire trace as the cutting wire im on the low end as far as heat goes i could use more but i dont have a better power supply yet heres a couple i have cut 23" and 44" i also cut a 30" all the same design just scaled up from the 23" flying wing i use profili and the zagi 12 airfoil in the last video at the end is full power off glide check it out bloody amazing how floaty this design is and it weighs over 700 grams i can supply u with dimensions if u like

23inch 73-80mph 3000kv 25g motor (2 min 1 sec)

30inch WS 3000kv motor 70mph - 112kph (1 min 53 sec)

PICT0006 (1 min 51 sec)
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Old Mar 28, 2011, 10:09 AM
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Lipo brused esc and tx work very well , plus you probably already have them, just slap a bow together made out of old scrap and grab some element wire from an old bar heater or guitar string and practice.
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Old Mar 28, 2011, 12:41 PM
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Thanks for the info folks. I'm looking for the capability to make 15 to 24 inch flat
bottomed wing halves for a total of 30 to 48 inch wings. Generally more of the
smaller ones. Just straight cut, non-tapered with 6 to 10 inch root. Primarily looking
to make stable low speed wings, entirely capable of flying at less than the speed of
thought for an Olde Phart that just enjoys Cub and Taylor style flight. Thanks for the
input folks and please continue to share your thoughts. Warm regards, Jim
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Old Mar 28, 2011, 01:11 PM
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Quote:
Originally Posted by Jim Hatch View Post
Thanks for the info folks. I'm looking for the capability to make 15 to 24 inch flat
bottomed wing halves for a total of 30 to 48 inch wings. Generally more of the
smaller ones. Just straight cut, non-tapered with 6 to 10 inch root. Primarily looking
to make stable low speed wings, entirely capable of flying at less than the speed of
thought for an Olde Phart that just enjoys Cub and Taylor style flight. Thanks for the
input folks and please continue to share your thoughts. Warm regards, Jim
cutting 48" wing cores is a lot harder than cutting smaller cores its easier to mess up i found the most easiest method cutting cores is to keep one side of the bow at one position and move the other end of the bow around the template
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Old Mar 28, 2011, 03:09 PM
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Hi Gaza,

I want be cutting any 48 inch cores, but rather two 24 inch wings. However,
most would be in the 36 inch total wing range. Something Blue Wonder 1300 size. LOL! It's my "Go To" motor. Warm regards, Jim
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Old Mar 28, 2011, 03:19 PM
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I've dabbled in hotwire wings; I have a nice ~17" bow with a Nintendo GameCube power adapter and some Sig nichrome wire. Works great.

However, my favorite/most useful hotwire tool has to be the 'table saw' I made. It's a piece of painted plywood (from an old shelving unit) with a wire strung through a hole in its center. It makes cutting big pieces of foam (1.5" thick) really easy and quick; I originally made it so that I could cut blocky wing blanks for my bow cutter to turn into wings, but I've found many other uses for it. I use an alligator clip for power regulation (move it up and down the wire) so I can go from a solid black wire to a bright orange, flaming hot spruce-stock-cutting monster
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Old Mar 28, 2011, 03:50 PM
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Quote:
Originally Posted by Jim Hatch View Post
Hi Gaza,

I want be cutting any 48 inch cores, but rather two 24 inch wings. However,
most would be in the 36 inch total wing range. Something Blue Wonder 1300 size. LOL! It's my "Go To" motor. Warm regards, Jim
yeah i knew that if u feel confident u can steadily move both sides of the bow without stopping either side u could make a 26 inch bow to cut each 24 inch core but i find its hard to keep the steady movement of the bow if u stop one side it melts the foam and gives a horrible finish as the root moves quicker than the tip if u use the other method i mentions where one side of the bow stays in one position and the other side of the bow cuts the airfoil u need a much longer bow to cut the same size core but allows and easier cut
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Old Mar 29, 2011, 06:42 AM
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http://www.rcgroups.com/forums/showthread.php?t=1290343


my first(with new bow) test wing flies

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Old Mar 29, 2011, 11:03 AM
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I wouldn't Putz around with my Lipos' ESC and TX just to heat up a wire.
Look at this:
http://www.aircraftspruce.com/catalo...hotwirekit.php
Either buy the thing OR study it to DIY a clone.
Use Stainless Steel braided wire, either Control Line OR fishing leader as the cutting wire .. It's the V best.
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