Hotwire demonstration

[@panchitolea]

I've seen guys making this process a lot more complicated (than needed) building CNC cutting machines and you did the opposite, make it as simple as possible! Using just one template and the nichrome wire!! Bravo!!!

Hi! The wire is "Nicrothal 80", 0.3 mm thick. The foam is bluecore/fanfold. For this type of foam 2.5A though the wire gives a good cutting speed. The voltage will vary depending on the wire length. Good luck!

[@elainlan]

This is the simplest and smartest foam cutter for wings, ever. Great work, David Michael Kang PCK Tech Inc. USA

@GreenAce92 Yes it does matter. The length from the pivot point decides the shape and size of the tip chord. Cheers, David

[@daveswanson543]

Negative pressure instead of positive, you think out side the box, solved a lot of my problems right off!. Thanx

[@averagejoe6031]

His old videos age like fine wine

[@MultiPetercool]

Now *THAT* is old school foamy building! Much respect!

[@MrRexquando]

Are the techno twins behind the camera? Perfect cut! Hope you are doing well back in Sweden. We miss you on flight-test.

[@Mawson6492]

Dude, this was from 2009 XD

[@ginopunsalan]

What you do is amazing to me. I've always wondered how these things were made. Thanks.

[@matdeeskbkn]

The best and this is what i'm looking for. Simple and smooth cutting result. ..wow

[@XrayMike]

This is amazing, thanks for showing. This is amazing. No questions asked.

[@strexttp]

Best video ever for building rc planes 😊👌

Good guess! It's from the stage of Snake Man on Mega Man 3

[@flightmonkey4225]

Wow ! That is a super clean cut.

[@polhemusel4490]

David Windestal please would you be kind enought to assist Me with a part[s] list for the making of the foam cutter that you use ?

[@sendmedem]

You are the man. Great channel. Awesome vids. I am building your tricopter now. Thanks for everything!

[@alexanderblacker]

This is a great video, i have been hot wire cutting foam using a big tool which is makes it hard to get a nice cut, using a pivot point seem to be a very good idea. How do you go about aligning the foam to the pivot point? How high is the string in relation to the peace of foam?

[@nitronano1]

Could you put up a video of how you build the foam cutter (materials, asembly, etc) and also how you made the mold and what material you use for the mold?? very smart by the way! great wings!!

[@venusreena2532]

Very smart radial design. How big can you make these?

Tackar tackar! Jag kör med 0.4mm nikrothal 80. När jag skär i XPS så kör jag på 2.3A och i EPS så kör jag 1.7-1.8A

Glömde skriva att tråden är Nicrothal 80 och finns att köpa lite överallt. Lycka till

[@berecztibor4956]

Hi David, Could you tell me what's the voltage, amps and wire diameter? I am having issues because the foam melts too much at the shorter side of the wing. How can you make it soo smooth? Maybe my wire is too hot?

[@matdeeskbkn]

The best and this is what i'm looking for..simple hot wire cutter and smooth cutting result...wow!

[@brisk5548]

Damn, that is an absolutely beautiful result. Are you doing any height control with your hands, or are you just using the pressure from the template for the vertical position of the wire?

[@dineshvyas]

Practical use of Vanishing point. Brilliant!

Cellplasten kan du köpa på de flesta bygghandlare. Köp den blåa då den är mycket styvare och inte lika bräcklig. Mallen är gjord från glasfiber som kommer från kretskortstillverkning.

[@carboncubss]

That was way cool, one of the better wire foam cutters! thanks for sharing...and you should slap the little Scott!

[@magnetron366]

that was so cool . I made a hot wire foam cutter . Light dimmer switch and 120v AC step down transformer too 25v.

[@auds_e7]

Can you show how to make this? And how did his hand not get Injured is he using a disconnected handle?

[@nigelkelseycouzens8266]

hi David:- I have got into this foam cutting I have made a ft explorer wing, and all seems ok apart from a few ridges in it. I then got some solortex covering, with a suggestion of using some spray glue on the foam and then using the iron on the solortex to shrink it on, what type of spray glue do u recommend on Styrofoam for this application. please can you help?

[@valderja]

Beautiful! So is this they way they form all foam cores for say DLG gliders like my Longshot?

[@GregDaGoblin]

That negative template seems to be the way to go ;) Soon be making my first attempt. I got a very similar power supply to yours. The instructions with mine says not to turn it on or off with a load. It doesn't hurt the supply when you power it up with the clips already on the wire??

[@Donatillo1961]

David , you amaze me every video !!!

[@MrBouncer1]

@jacquesone100 I thought so too!!! I am a subscriber of rcff...i think with some of the planes paul and frank build this technique would cut down on their build time was thinking about sharing it with them...what do you think about it?

[@spannerman4886]

Nice demo David can I ask is that Tungsten wire and what is the SWG also what volts /amps settings on the bench power supply please? Thankyou

[@SnapPunchRobert]

Why are you cutting on an angle? what are the guide wires for under your foam, meaning why on an angle? What if you want the wing to be the same width on each side, what do you do then? What wire are you using please.

[@Pjh1955]

This is amazing can you use any foam excellent job

[@WingnutDumbace]

Where did you get the power supply for the cutter

[@SLINGSHOTandMOLOTOWS]

wery nice with the inverted template and fixed wire. is that masking tape"

[@puchomoreno]

you can do it with a PC power source.. Since you can use 5 or 12v and also supports the current easily as long as the wire has over 10 ohms. Actually i tested it with 12v, and a guitar string (the thinnest) wich had about 20 ohms, and current for that resistance at 12v is about: I=V/r=12v/20ohms=0.6 amps. In 12v the source can handle in my case up to 9 amps. Overall the power used is 0.6A*12v=7.2 Watts.

[@carpenterfamily6198]

Very nice. What kind of foam ? What were power spec's to the wire ?

[@pagani8]

@abdon0221 You can find it in most hardware stores, like lowes and home depot.

[@jacquesProduction]

@MrBouncer1 i realy like it man..i just dont understand how the tread seems to follow so good on the other end...its reallt amazing...i think u need skillz to do it like u do!! sure u could show Frank and Paul..see what they have to say :) good luck with it man...hope to make my wings that slick one day...:)

[@bigbigmen9]

hi! I like this technic very much but found no info how to make this cutter(searched your site and google). could you tell us how to make it? It would realy help. Thanks!

[@gewizz2]

lol im bodging a hot wire cutter up now, i really thought there was no dollar tree foamboard or anything like that in my area but then a builders yard down the road has big very tough lightweight blue board for insulation. it seems so tough i cant snap it. 1.5" thick about.

[@nitronano1]

wow....can you tell me how much power u used? and the measures of the molds??....what kind of cable u used?....

[@vanepico]

This is awesome! You are definately the best bit of flitetest!

Nätagget är ett, labbagregat som har modellbetekningen; PS3005. Det kan ge 0-30V och 0-5A. Jag har haft agget ganske länge, jag använder det vid elektroniktester mm. Kommer tyvärr inte ihåg var jag fick det ifrån :D

[@lancer525]

Man, that is several different kinds of awesome! Most amazing thing I have seen in a while. I wish there were someone nearby who could cut wings for me! Just awesome.

[@AbosoluteAltitudes]

Is there a benefit to using the stencil you did to cut vs having the opposite? Like using the piece you cut out of the stencil instead of what you used?

[@EngineeringFun]

I've been using this since 1980 but in a well balanced, wire supported frame (exactly the same pivot point technique but less wire sag). Using the positive template makes the work (dragging through the template) more difficult, especially around the leading edge. The final results are poor to say the least. A negative template is the only way with this method. You should make sure you use hard wood ply with well sanded and soaped edges. Fiberglass sheet is great but more expensive. By the way, he went too hot here. His wire cuts too fast and melts too much of the airfoil at the tip.

[@zzstreetstyle]

Vad är det för material som du gjort mallen av. som den inte skär igenom. det varkar tunt..

[@abdon0221]

where do you get the blue foam from? what is the name of it? thanks in advance.

[@gewizz2]

have you made a foam wire cutter yet? im thinking of making one.

[@radiorob007]

why do you use an internal mold? why not A mold where you cut out around the outside? Greetings from the Netherlands. Rob.

[@eduns]

much better with the red clamp placed in the pin. so the wire is not disturbed when it touches the board

[@NeverSquid]

Does it make a difference if you start cutting from the bottom or top?

[@SnapPunchRobert]

David, Could you please show how you built your wing cutter set-up table. also I have question about wings of equal size airfoil front and aft. Your hotwire table is just about the best Ive seen on youtube. Really dig ya on Flitetest too. You are wicked smart dude. Wicked Smart

[@joe-cm9hy]

A negative of social media..if it's not on social media it has never been done before. I learned that technique from a fellow builder more than 15 years ago!!! Sorry to deflate anyone, but truth is truth.

[@SnapPunchRobert]

Joe Valdez If you know the technique, maybe you can do a video tutorial? maybe? I can't use my left arm much anymore and I'm trying to find a way to do this with one hand mostly.

[@allanfernandez7865]

SnapPunch Robert sorry you can't use your arm anymore what happened

[@SnapPunchRobert]

rotator cuff among other stuff

[@allanfernandez7865]

yeah

[@deandake]

pretty bad ass sir. you make it look sooooo easy. I'm inspired. Now I just need to learn to fly :)

[@JipJac]

Very, very cool video. Thanks for showing an amateur who has never done this.

[@zzstreetstyle]

Hej Vad får du materialet du skär ifrån? Var får du tråden du skär med ifrån? /johan

[@friedchicken1]

i checked my guitar string and the thinnest 3 are made of nylon.. will that do?? thanks!! and thanks for the info!! :D

[@XrayMike]

I have not made one yet, as I don't have time for making one, and figured I can't get foam blocks cheap anywhere nearby, if at all.

[@yeahitworks]

hi, whats the wire (nichrome?), wire gauage, foam type, amps, volts.? great job!

[@easyazpie9091]

You could then use your 2 waste pieces as a "mold". Use a liquid fibre glass & put it inside a pressure pot to cure.

[@wickedtactical8991]

Been following you forever!

[@TomSarracino]

Wow, really nice smooth cut on that wing. That's not easy to do. Takes practice. Cheers!

[@ingeniuss90]

Interesting. But, how can you build in some washout?

[@ATrustInThrust]

Wonderful work by the way. I mean the comparison to mycroft only as a compliment

[@marce002b]

what is the material for the template and how did you make it? after printed on paper

[@fortsw5050]

What profile for a flying wing will advise?

[@daveswanson543]

What material are you using for the rib's

[@hotvedt2]

Tjäna David! Hur tjock är tråden och hur mycket ström trycker du på den?

[@giovanniraciti9346]

what's her name and where you buy this stuff?

[@timboehnlein4816]

How thick is the template and what is it made of?

[@tomaspuo]

David, could I use a different wire? Thanks.

[@draguilaraguilar3636]

Thank you for show us David!

[@Helicopterpilot16]

Whats the thing you use to control voltage and amps with?

[@OlrudFlyers]

Hey! Get back to the TestFlite channel! :):) I guess this was before you joined those guys! Finnes det noen tegninger på hvordan du satte opp dette for riktig vinkel på vingene?

[@milkweed728]

hey do you know where i could get something similar to that template.

[@Regis_._]

good method for cutting a wing, but, what about washout?

[@jotoni1861]

Hola. Muy buenas tardes. Podrias decirme que medidas son las que se debe usar para hacer una cortadora igual a la tuya? Gracias

[@hornos27hotmailcom]

hola, las medidas son de acuerdo a las necesidades de cada persona en el corte a realizar, lo basico es el alambre de corte que es de un material llamado ferronikel, asi se conoce en mi pais, es un metal que tiene las caracteristicas de calentarse electricamente sin romperse ( es con lo que fabrican las resistencias calefactoras de ambiente ) y lo otro es una fuente de poder o de energia con la cual se regula le intensidad de calor que se nesesita para hacer en corte dependiendo del material que se va a trabajar, unos con mas otros con menos calor, estos aparatos regualdores controlan tanto el voltaje como el amperaje que circulara por el alambre de ferronikel y asi hacer un corte perfecto. las fuentes de poder los consigues en tiendas de electronica especializadas que pueden ir desde 0.5 volts a 35 volts, y de .100 mA a 15 Amp, es solo de buscar la mas economica ya que no se necesita precision de laboratorio.

[@geisterglow4857]

whoa, the wing looks really nice :)

[@weasele1]

thanks for posting this video dave its very helpful , I am doing a foam full scale bird of time lol wish me luck

[@cosmiccolonel]

what a beautiful job you made of that..........

[@raeesahmad6344]

n.

[@shimon174b]

Really, really EXCELLENT video!

[@winxwassa9949]

Depending on this cutting method, there is no washout at the wing tip. But many people say that a flying wing cannot fly without washout.

[@Harlanmote]

+Winx Wassa I have never built a flying wing with washout and they all fly just fine......

[@winxwassa9949]

+Harlan Mote Thanks for your reply. This is an important news for me.

[@Harlanmote]

I use a Clark y airfoil and a Eppler 332 airfoi it is for a flying wing it has wash out built in to it. look on google @ UIUC Airfoil database they have a lot of air foils just for flying wings. I hope this helps you out....

[@Harlanmote]

I made a hot wire cutter out of a power supply from a old computer i had laying around and a piece of stainless wire.There is a video on here that the guy shows you how to jump the green and the black wire and get the unit to power up and what wires will give you 12 or 24 volts. i use the 12v work's really good on blue or pink foam and polystyrene too.....

[@MegaWolfman76]

what was used for the template?? what material???

[@Lawiah0]

I just love low time story tellers.

[@friedchicken1]

why don't you use a solid wood cutout instead of paper for the profile?? ;)

[@microguyprod]

what do you use to power it?

[@LadyScorpion811]

Hmm is the music on the background from a Nintendo game.. Mega Man 3?

[@rcbubble]

hej.. snyggt.. vad använder du för tråd och hur många amp kör du på?

[@davidsmedberg2131]

Vad är set för frigolit du använder?

[@bodzio307]

what type of wire u re using?

[@javieruriel]

Which wire are you using?

[@espr7564]

Awesome demo David thaks !! 👍

[@utkarsh2301]

Boy you are marvelous !

[@talismenf2253]

okay but how would I hot wire a complicated wing like the wing of a 777???

[@dtiydr]

+Glen Batts With a REALLY long wire and some skill.

[@talismenf2253]

That do not help much lolol.

[@dtiydr]

Glen Batts Ok with two wires, then its doable.

[@sslavi]

For each half-wing, by cutting separately 2 wing sections and then glueing them together.

[@DanielDrejerDK]

Beautiful! Well done!

[@samiant5199]

ft anyone