Hot wire airfoils and bow

So u don't use any voltage regulator to increase or decrease the power on the wire

Thank you for the information and a simple video.

Hi love your videos looking about building my own wing iv own fpv plane and a zephyr 2 wing and as im on my own not had much luck flying both been destroyed haven't got much money to buy another wing .
how easy to build one .
Can i cut a wing like you and be able to fly it worried of cutting and having wright angles PS not to bright.

Hi Andrew, I start now to learn the cutting of wings with hot wire, my problem is that the wire is cooked after a few seconds, I use a nickel guitar string of 0.36, and I connect to a lipo 3s 2200mah, maybe it's better change the diameter of the wire with a 0.6mm?
for the template instead I used an old tin of oil, because here in Italy I can not find the roll of aluminum that you used to cut out the template.

Thank you, I hope I will not get rid of you with these beginner questions

Greetings from Italy

Marco

you can always use single strand fishing wire used for salt traces or stainless welding mig wire .. but guitar wire is thinner

Piece of cake nice job great idea.

Judging from my experience with foam cores the biggest challenge is what to use for covering the core afterwards. I've tried packing tape, wood varnish and iron laminate 80mil. The laminate will stick great to the foam however, after time it will start peeling. The material is also relatively heavy compared to EPP, EPO or Styrofoam.
The wire cutting technique is very entertaining though. I still have my bow and few wings already cut.

Great info thanks Andrew.
NZ builders can also get the same insulation from Bunnings 😀
I can only find 70 kg ss wire which is 1 mm...How thick is yours ? Do you think 1 mm is too heavy ?

Kanthal A-1 wire is made to do this ... why use something subpar? ... It's stronger and cheaper ... less than 10 bucks for all you will ever need. You can get it at walmart, home depot, etc ... it's ubiquitous.

Brilliant!!!!!!!

Or, make a notch in the underside (flat side) of the guide ribs then lay your spar in...done.

Hell we were doing this 30 years ago making wings

You completely glossed over on how to locate both airfoil templates so that the cut is not crooked

One of my dads old buddies did this about 30 years ago in his shop. Made one airfoil large, on small. Made huge delta wing gliders.

Can you do a video on how you make your bow and what you use for tension please...........

👨‍💻👉USE FUSE WIRE ITS CALLED RESISTANCE WIRE- as in old fuse box Wire heats wont break also used in heater coils ect🕺💭🐏🐨👍

Thanks for making this film 👍 What was the spar made out of? How did you fit it?

We have had same cutting 50 years ago,
Anatoli, Kiev Ukraine

Is your Depron wing the same thickness as well ?

Do the ply templates have to be aligned at each end with each other?  if one is tilted up and other tilted down will that effect the shape?

Thanks

Supper

About 6-7 years ago I was fortunate enough to have a Dead Radiant/blower heater which of course when you look at them have a good 10m+ of coiled up Nichrome wire in them. I scavenged and built a 1.3m wide Wire cutter. From there I worked on a Massive Foam core Fibreglass wing project. The Foam was EPS - Also from Bunnings - haha - but was the Standard White Underfloor insulation. OH BOY THAT STUFF WAS MESSY!


The XPS was never around at the time...I was in bunnings the other day and saw two whole racks of th Knauf...I bought a sheet and look forward to cutting the single sheet of 1200 x 600 into a single Flying wing design - just for kicks. I now have probably 15 sheets of EPS still in the garage I am giving to some guys at work because I have a feeling the XPS will be my New material of choice!

I was really surprised at your setup. I would have thought your wire choice would have had too much resistance to heat up evenly with you power source. I would have thought the wire would cool too fast when cutting that length.Looks like really nice results.

i test today this whit styrofoam, not come good, how you can cut wery smooth wing, i have lot wire holes and how strong you has make hot wre tension ? sorry my english i mean wire i have wery flex how can tighten wire lot more.

great video thanks for everything

Making a hand launch glider out of foam will be fun. Plz make a try

Metal A string is the one to be used? I keep the old metal strings after replacing by new ones.

This video is brilliant. youre info share is gold worth for me. UiUC airfoil data site, i wish i knew that one before :) . Nice Build btw! i like the idea. Greets from holland.

if you go into a e-cigarette store you can buy assortments of resistance wires in any gauges for pretty cheap too

very usefull and to the point

Will 0.9 mm stainless steel wire work? Thanks

hey how did you made flaps and ailerons

beautiful...thank you so much

How do you get templates to be precisely aligned?

Great Work,⭐️⭐️⭐️⭐️⭐️

Nicely done, thanks for sharing...

channel and your work !!!! what is the length of the wing ? and what is what is the length of the Ailerons?

For the spar I'm thinking of using a laser cutter diode, won't need to be very powerful.

Then I can put it on a CNC track, line it up and fire the laser along the longitudinal axis.

But since I don't want the laser cutting through completely, what I figure I'll do is make a tiny slit at where I want the spar to end inside the wing and place some a tiny bit of stainless steel. The laser should hit it and not cut through or heat up too much.

I'll use a square spar as well, which will make the CNC along the X and Y axes pretty easy.

I'll document my progress and come back

+1

What about wire from a second hand store hair dryer?

Stainless steel safety wire works well.

These videos are an inspiration for anyone into rc planes.

Easy question-

Looking at basic airfoil shapes, when one makes a Armin wing the top is a curve surface that extends that curve that form your control ailerons or flaps past the bottom of the wing.

Meaning the control surfaces curve beyond the flat bottom section.

When one cuts out ailerons they can be moved slightly uo to keep to match flat profile of bottom but the parts of curved area right next to ailerons keep that curve downward

A) does the wing fly OK if control surface area keeps that downward curve in the wing?

B) or should one completely remove control surface area & re attach ones that keep & match flat bottom looking from the side view of wings?

Hi mr. How do you be sure you dosent make a washout or in when you put on those templates. ? Could be u think this is silly question , but l realy wondring about that. Thanks to if you answer me .

.....YOU NEED TO INSTALL AN INLINE FUSE-HOLDER, AND A ~3-5 AMP FUSE!!)...

This is fantastic, maybe use the wire cutter to open a channel in the wing root to add the spar. What length did you choose for the wood for the cutter?

Nice video. What is the board you are using. Is it usual craft foam or styrofoam.

I use .025 aircraft safety wire. Works great! Then I use a soldering iron with a metal yardstick to melt a channel on the bottom . Install a 1/8”-3mm carbon fiber rod. Then fill the channel with epoxy. Then cover with colored shipping tape. Made 6 planes like this…gliders to 3D foamies…13 years ago. All still flying perfect!

Next project is the “DLG F3K style RC electric glider”. Marko Roolaid on YT. Body is 3D printed with CF filament. Wing is hot wire cut with carbon fiber glued to the top. He uses a food saver vacuum bagger to suck the wing down while curing. 3D printed parts are on Tverse. I’ve already 3D printed all the parts on my Bambu Labs A1. They look good!