I love the plastic film that strengthens not only the surface, but the entire structure, for reasonable weight costs.
@AndrewNewton7 жыл бұрын
That's right, they are quite rigid without spars.
@jeffbeck65017 жыл бұрын
absolute art. all of it. the video, the project, everything
@AndrewNewton7 жыл бұрын
Thanks Jeff, it does feel like magic
@abdurrahmanak72697 жыл бұрын
Andrew Newton hello... Can I use this type of material(foam) for some type of bigger plains... please reply fast..
@jakegarrett81098 жыл бұрын
For those that want to know V=AMPS*(Res), (you sounded surprised that with 3.5 ohms, 12V, it pulled 3.5 amps). For power it is V^2/resistance = power (watts). That's all you need to know. Also nichrome is super cheap, and besides that it takes no material to make a quick rig (I start up my dirt bike for power source, tie one end to the metal poles on my porch, and tie the other end of the nichrome to a brick, then shorten the wire if you want more power and heat, only thing you need is nichrome and a power source. I use that setup for general cutting of basic shapes in Styrofoam, not airfoils though). That plane flew nicely in the end, nice peaceful background music in the end too. Keep up the good work!
@AndrewNewton8 жыл бұрын
+Jake Garrett Thanks Jake, good input
@chrisboyce65427 жыл бұрын
Hi Andrew, for inserting the spar, I use the hot wire, cut a tapered U shape where you want the spar remove the cut out deposit into that your spar, trim from the tapered U sufficient material to allow it to fall into the hole and cover the spar and adhesive, later sand any over sized foam flush with the underside or top side which ever suits. The same can be done for servo wire laying a tube to through which your wire are feed . Great video thanks Chris
@AndrewNewton7 жыл бұрын
Thanks Chris, nice tips. I'm using edge on CF trips in slots these days
@Jacey20015 жыл бұрын
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.
@damienbernier93786 жыл бұрын
All of the two bit RC pop up manufacturers are going to be really upset that you gave their secret away for cutting Styrofoam. This was a great video. Ever since I learned how to work with Styrofoam I don't throw ancoy of it out. When you can make clean cuts...the possibilities become endless when you start learning the variation of heat to get the foam to mold in certain ways. Its very precise. For wheels or circles of any kind I use old tin cans. Clean them up real well and place the open end on the stove (electric works best) for 30 seconds, spin gently and quickly or it can stick. If its hot enough it will pass right through, but the edges of the foam can get hard. Thanks for the video!
@AndrewNewton6 жыл бұрын
Tin cans, brilliant Damien
@3000gtwelder9 жыл бұрын
Great video. I was going to build one of those a few years back before I got into the foam board. I bought a transformer from Radio shack and a dimmer switch to use to regulate the power and a E string for the wire. I like the battery way a lot better I think. Great idea.
@samievans96326 жыл бұрын
Thank you for the information and a simple video.
@Justwantahover9 жыл бұрын
I never saw that sort of cut before. Well done. I used to do it with cross-section air-foil cutters, I made out of piano wire mounted on a special board. It' was a lot of mucking around making the air-foil cutter. You don't have to do that, you just make the air-foil guide ends. That's a lot easier.
@lklmmedia47155 жыл бұрын
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!
@AndrewNewton5 жыл бұрын
Good tip about the radiator wire.
@zooknut9 жыл бұрын
Nice work mate, good to see people joining the sport and putting video's out there. I have been cutting wing cores since high school nearly 25 years ago. The process is pretty much the same. Although it is best to cut the top and bottom separately with different template's that ramp you in and ramp you out. It eliminates wire drag that can make the middle of the wing chord shorter, the same as going to fast around the L/E. Having two people and reference lines on the templates helps also. As for spar's sometimes the simplest spar is a shear web of 3mm balsa just cut down vertically and glue it back together. If you want a 2 piece wing then carbon arrow shaft and brass tube works well. Cut out the foam as a big chunk, line it with light ply or balsa (depending on flight loads) glue the tube in and fill the gaps with a light epoxy and micro balloon mix. Keep up the good work buddy! Catch you at Bunnings ;-)
@AndrewNewton9 жыл бұрын
zooknut Sweet, thanks for your tips, lots of technique to learn for a perfect cut but foam is cheap.
@meljones70669 жыл бұрын
Great video Andrew, I have been thinking about using a hot wire for a while but never have because I thought I needed a special power supply, never thought about using a lipo. Many thanks for pointing the way.
@AndrewNewton9 жыл бұрын
+Mel Jones Good to hear Mel. I have just worked out that a 4S LIPO is much better for my rig that cuts 750mm wings. 6S (2 x 3S) is too much and breaks the wire but 4S is perfect.
@jejurij8 жыл бұрын
That's awesome, already thinkin' about making one.
@barrosnpor9 жыл бұрын
nice one! Here in Brazil people are used to do that first than the depron wing. Both work very nice... keep with the good work man! Bye
@sammas20778 жыл бұрын
Thank you for sharing your project. An excellent and very clear no nonsense hot wire cutter.
@AndrewNewton8 жыл бұрын
My pleasure Sam
@gonzalosanchez90877 жыл бұрын
Excellent! Beautiful video! Thanks Andrew
@ednaldocampos9 жыл бұрын
Thanks for the video. It is very important to show with details the material and you did very clear. Nice project.
@AndrewNewton9 жыл бұрын
+Ednaldo Campos Thanks for noticing Ednaldo.
@livinggood55457 жыл бұрын
Very nice smooth cuts. Your machine does a awesome job of cutting.
@AndrewNewton7 жыл бұрын
It takes some practice and they are never perfect, but they are good enough
@kevinsraydatme9 жыл бұрын
Ditto. As per everyone, this is a great video. Off to Bunnings tomorrow morning.
@AndrewNewton9 жыл бұрын
Kevin Ray I don't know how long Bunnings have carried this foam, only discovered it a few weeks ago.
@kevinsraydatme9 жыл бұрын
Sorted. Went to bunnings today and ordered 2 x 30mm and 2 x 50mm. They are both 1200 x 600. Should have them next week. Gives me a week to build the cutter like yours and design a wing.
@ss97673 жыл бұрын
Nicely done, thanks for sharing...
@Drezed019 жыл бұрын
Consider using 2 separate pieces of foam to make the wing. Cut a channel out of both pieces of foam, and insert your intended spar (you can cut channels for electronics, as well). Laminate the 2 foam pieces, and apply your templates to the ends, aligned with the chord line and your preferred position of the spar. Jeff
@AndrewNewton9 жыл бұрын
+Drezed01 Thanks for the tips Jeff
@jamesjacocks62218 жыл бұрын
Great video. I use an auto battery and rheostat and stainless wire. There are many ways of sandwiching the foam, some obviate the use of spars, at least full span spars. Andrew, I just hot wire a box section for the spar(s) which may be made tight against the spar or filled with sparkle or glue. Made strong, the foam wing could be a bench seat. You can make virtually any airfoil as you intimated. You sure have the slope sites!
@AndrewNewton8 жыл бұрын
Thanks James. Yes we do have a selection of slopes.
@SnapPunchRobert9 жыл бұрын
Sweet, Nothing you can't do mate. Kudos.
@SammSheperd9 жыл бұрын
There's no easy way I know of to bore a good hole for a spar. I usually just melt a trench on the bottom of the wing halves with a soldering iron and glue the spar in, Just cover the slot with some film or tape.
@AndrewNewton9 жыл бұрын
+Samm Sheperd (SNRS) As long as the core is thick enough I can now drill a long hole but for swept and thin wings I'm cutting a slot and gluing in a 6 x 1mm CF spar.
@devilidol6 жыл бұрын
I just used a square wooden dowel cut the wing out in such a way that the wooden dowel sits flush with the wing and glued it in with some 5min epoxy glue.
@shadewar4 жыл бұрын
Shouldnt have looked into the comment section. Now im sad...
@saleplains4 жыл бұрын
@@shadewar same
@deltasierra42062 жыл бұрын
I have done it by standing the wing perfectly upright and dropping a heated ball bearing on the spot where you want your spar tube run through. It wil melt thrue like butter
@Red20RC9 жыл бұрын
Awesome work! So glad I saw the bunnings foam before I practised on much more EPP ($50 a sheet!). Now got a stack of the knauff eps to play with first. If you want to try different wires, Jaycar do 0.13mm nichrome wire for a few dollars. Good stuff and heats up nicely on about 40W power.
@AndrewNewton9 жыл бұрын
Red20RC Glad to hear it and thanks for the tip.
@grahamrdyer63229 жыл бұрын
Yep another good video, After watching the plane fly a spar looks to be on the list of things to do (there is always something), what are you going to do, cut one in or melt a hole in the wing with a hot metal rod, I dare say you will sort it Andrew.
@AndrewNewton9 жыл бұрын
Graham R Dyer I think I'll use a dremel to mill out a channel and glue it in.
@JOeSJNrForReal7 жыл бұрын
Thank you very much for sharing this technique. Just like I mentioned before, i'm gathering all the knowledge about this wing building as much as I can. Thanks again!
@AndrewNewton7 жыл бұрын
Excellent, good luck, it's very satisfying.
@EricLaermans9 жыл бұрын
Looking forward to the ultra-light slope soarer.
@mgraemem9 жыл бұрын
Great notion. One sharp cookie you are. Yes, it does look like a spare would be a good idea.
@colofoniusregenschein75148 жыл бұрын
Thank you for this video! i started with my own hot wire now but i had great problems with the curve. So i used thick carton for the templates and took the outer part for cutting the airfoil and the inner part just for the notches.
@AndrewNewton8 жыл бұрын
+Colofonius Regenschein Thin aluminium is my favourite template material now. Cut out with scissors.
@MilanKarakas9 жыл бұрын
Really good idea to use LiPo batteries. I use sliding autotransformer for this, bacause sometimes want faster cutting, and setting to about 20 volts or so. If you want to make hole for the spar, you may use aluminum or steel tube, make teeth at ne end, and carefuly align so that it drill hole along the wing. Rotating gently in both dirrections and it slowly cut nice hole for spar. Ocassionaly you may pull it out and clear foam by inserting metal rod on opposite end of the tube, so that it pushes out jamed foam. EDIT: Spar in many cases doesn't need to be long as the wingspan, but maybe 2/3 of that length. Find it by experiment - bending wings or gently rocking to see how it behave.
@AndrewNewton9 жыл бұрын
***** You have just described exactly the technique I have settled on but I'm using the spar tube itself in a drill, works really well.
@MilanKarakas9 жыл бұрын
Andrew Newton Oh, yes. This works too. I am just saying, because don't remember whether you done this thing already. It is better to said twice, than... Best wishes.
@dorianmccarthy76026 жыл бұрын
My Digitor multimeters probes have about 1.8 Ohms in the leads, so you'll have to test yours and subtract that from the reading you got across the wire to get the resistance of the wire itself.
@rcflightseeker34889 жыл бұрын
like the video, I have done the same thing with the same type of foam. have the same issue with putting a spar ended up just cutting a groove on the underside of the wing and laying the spar in it. I think the next time I plan to build a wing using hot wire cutter and insulation foam, I I will use two halves to make the wing two layers of foam one on top one on bottom that way when I go to cut a groove for the spar I can take one half off. using that technique I think the wing will be more stable, because when you glue the two halves of the wing together it will be almost like a spar itself.
@AndrewNewton9 жыл бұрын
+RC flight Seeker Interesting, don't think I can cut accurately enough to make the wing from upper and lower thin haves but it would solve the spar issue.
@RavenRaven-se6lr5 жыл бұрын
Piece of cake nice job great idea.
@LWJCarroll9 жыл бұрын
Kiwi's FYI Bunning's carry this brand xps foam, in New Zealand...there is also a company making XPS foam in Christchurch Gold Foam I think its called....Rgds...Laurie
@wordreet9 жыл бұрын
I had a go at this a couple of years ago using a discarded guitar string from a friend. It works ok, but then I discovered Experimental Airlines and went the easy way. I shall come back to hot wire cutting, but I have one or two ideas brewing to improve (more complex) the folded style method.
@AndrewNewton9 жыл бұрын
wordreet Excellent, photos and video please.
@wordreet9 жыл бұрын
Heh, don't hold you breath, they are just ideas at the moment. ;¬)
@w.j.bendellr.c.flying.10373 жыл бұрын
Great Work,⭐️⭐️⭐️⭐️⭐️
@robaust30499 жыл бұрын
Great work Andrew, well laid out, informative and useful.
@AndrewNewton9 жыл бұрын
Rob Aust Thanks Rob
@richhandler26219 жыл бұрын
Great video! I built a cnc hot wire cutter that does all the cutting for me, but operates on the exact same principle you're using here. I have some airfoil comparison/generation software (it's called profili) that allows you to view the data on different airfoils as well as generates the cut path. The software creates a "spar" path, which basically cuts a circle in the middle of the wing (from the top or bottom). You could just drill/cut a spar hole and wire path from the top (or bottom) in your wood jigs. I think that would solve your spar issue. I use NACA 4412 for my FPV planes, NACA 0012- NACA 0014 for aerobatics, NACA 3413, NACA 2413 for casual aerobatics. Welcome to the new world of airfoils! I think I have more fun experimenting with new airfoils and designs then flying the damn things.
@AndrewNewton9 жыл бұрын
***** Thanks Chris, great tips. I did wonder whether it was possible to use the hot wire for the spar channel, must try that.
@otasty79918 жыл бұрын
Thanks for the video, it was very helpful and I am looking forward to cutting my own foam wings soon. I think the best way of cutting grooves for spars is to use a soldering iron and a locking collar attached to it as a depth stop. The collars are commonly found at hobby shops for making landing gear wheels not fall off. You may also find them at import chinese tool stores as drill bit depth stops.
@AndrewNewton8 жыл бұрын
Great tip, thanks.
@FPV420.5 жыл бұрын
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.
@joewoodchuck38245 жыл бұрын
Some people have used the poor mans monokote which is the clear heat shrinkable sheet used for making up gift baskets. Dollar Tree has it.
@eddiel15385 жыл бұрын
Hi mate I am using craft paper with wood glue. Improves polystyrene strength many times and can be painted over easily. Give it a go you be surprised how much will improve strength and look of your aircraft. Cheers Eddie
@rckeith9 жыл бұрын
Hi Andrew. Nice video. I started making foam wings like this for my Vicker SuperVC10 and then got fed up making all the templates so I built a hot wire CNC machine which I use for wings and fuselages now. For spars I use a Dremel with a tile cutting attachment and a straight edge as a guide, Saw this on SD ParkFlyers (tallguysd is his youtube channel) Works really well and I still use this method on my CNC wings.
@AndrewNewton9 жыл бұрын
+keith howlette Thanks Keith, I do follow tallguys videos. I OK using templates at the moment but a CNC cutter would be vey nice.
@rickmullins47306 жыл бұрын
Excellent job on the wings, looks like you've created a great way to cut them, you mentioned about spar improvement, how about a 3/8 aluminum tube spar forward of the CG and a 1/4 aluminum spar to the rear of the CG, should be a much stiffer configuration, great enjoyable videos.
@AndrewNewton6 жыл бұрын
That would be solid, like Volantex model wings
@عبدالرحمانابننافع6 жыл бұрын
Good tutorial Thanks.
@ericnielsen95748 жыл бұрын
Use a square or rectangle spar. Cut the square or rectangle into the template and use your hot wire to notch the wing. That works pretty good.
@ericnielsen95748 жыл бұрын
+eric nielsen Forgot, you make a second template with the notch. After you cut the airfoil as you show, you switch to the template with the notch. Then use the bow to notch the top or bottom of the wing. The square spar slips into the notch and you just tape or cover it.
@elxero21897 жыл бұрын
Nice job enjoyed your video thanks for your hard work
@AndrewNewton7 жыл бұрын
Thanks, glad you like it
@quadflyingmedic79889 жыл бұрын
Nice video! Been wanting to do this to make wings. Great tutorial. Like tne way you explain thins very simple and to the point. Keep them coming
@AndrewNewton9 жыл бұрын
Quadflyingmedic Simple...that's me. Thanks.
@SuperDave-vj9en6 жыл бұрын
Pulling out and starting again? My wife said, "once your in, there are no "in n out" privileges!
@AndrewNewton6 жыл бұрын
Sound like she knows her hot wire cutting!
@rickyracer87174 жыл бұрын
🤣 🤣 Best comment!
@leswheeler20236 жыл бұрын
A good source of template material are used litho printing plates (offset machining not digital!!) from a commercial printer. Can come in various thicknesses, but all are thin enough to cut with scissors easily. One plate will give you enough material for heaps of profiles. You only have to ask and they will give you one or to. They are normally scrapped.
@arunjangra49607 жыл бұрын
Wow great video Andrew
@stephenfereday83089 жыл бұрын
Great video again Gotta try that
@Sqwince237 жыл бұрын
I just made a wing like this and decided to use a router table with a fence to cut a slot down the length for two carbon arrow shafts as spars. I cut a #8 bold head off and used that to join the two arrow shafts together tip to tip to make it long enough for the entire wing span.. cheers.
@AndrewNewton7 жыл бұрын
Sounds excellent. I just experimented with a small U shaped hot wire to cut a slot for an aluminium tube. Worked nicely
@MrHristoB5 жыл бұрын
Brilliant!!!!!!!
@slodays11589 жыл бұрын
Looks great! I used a very similar technique to cut my wing. I experimented with the thin metal sheet as well as cutting the template from balsa. Both worked great but the metal sheet was easier just make sure the edges are smooth. You can see the end result on my page. I also like your spar jig from the other video.
@AndrewNewton9 жыл бұрын
+JDs Slo Days Thanks JD. I have switched to thin aluminium and just cut with scissors. Easiest template by far.
@RCFlightAdventures9 жыл бұрын
using a negative of the airfoils works great for cutting the top half first and then the bottom half
@AndrewNewton9 жыл бұрын
RCFlightAdventures I tried positive top and negative bottom and it worked well. Yet to try all negative.
@RCFlightAdventures9 жыл бұрын
started building a 3m fiberglass pilatus b4 like that a year or so ago. working on it from time to time, it's turned into a club build now xD
@ShahriarFarkhan7 ай бұрын
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?
@AndrewNewton7 ай бұрын
Thanks, long enough to hold 800mm span of wire
@Mikinct2 жыл бұрын
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?
@AndrewNewton2 жыл бұрын
Good question. I tended to set them up flat with the bottom, not following the top curve. Both ways would work, maybe more lift and slower flight if they followed the top curve. More speed less drag if. they are flat with the bottom.
@Mikinct2 жыл бұрын
@@AndrewNewton . You've been in the hobby longer than I. Which methods work better for Gliders? A- armin wing depron approach or different foam using Hot Wire cutouts? Ever fly 3D printed winds, I've watched J5 glider competitions & some ideas have 8ft upto 14ft wing spans with 11 pound Gliders.
@AndrewNewton2 жыл бұрын
3d printing is no good for wings IMO. Depron armin wing is much easier as long as you keep it thin, like 10%.
@ashok3053 жыл бұрын
beautiful...thank you so much
@yassermasood34236 жыл бұрын
Thank you it is a very helpful and nice video. I will try it.
@stephengloor84519 жыл бұрын
A while ago I built a foam cutting rig. I use a 30V AC transformer that I scavenged from something or other. On the 240V AC side I wired in a standard 240V light dimmer to control the temperature. The hot wire cutter is connected to the 30V AC side and it works a treat. You can turn it up to the best temperature that just cuts the foam with the light dimmer. My favourite airfoil is the S7037 which is in the database. I use a program called WinFoil to print out co-ords as you can design the wing allowing for skin thickness if you need to. Compufoil is also another good one. The S7037 is a really good all-round glider airfoil that is much lower in drag than the ClarkY. The S3021 is also another good choice. For faster models the classic RG15 works really well. For my flying wings I am using the MH45 at the tip and MH46 11% at the root. It flew pretty well once I got the CG right. I got this wing cut by someone else out of EPP foam.
@AndrewNewton9 жыл бұрын
Stephen Gloor Thanks for the airfoils tips Stephen. I tested an RG15a111 on my ultralight sloper today and it was very nice.
@stephengloor84519 жыл бұрын
Yep the RG15 was a favourite for F3B for many years. They tend to use the newer airfoils now that blend from root to tip such as the A series from Andrew Drelar or the HQ series. However the RG15 still is good.
@JonElofson9 жыл бұрын
Nice work, Andrew. Now I am inspired to build one. Looks pretty simple. I might try using my router to route a groove down the CG line of the wing to glue a spar into, rather than trying to drill. Thanks again.
@AndrewNewton9 жыл бұрын
Jon Elofson I agree Jon, that's the obvious solution. Need to protect the foam from the router base with tape maybe, it's pretty easy to mark.
@lexxdysia9 жыл бұрын
Andrew Newton An alternative which may be easier could be to make a cut say 5mm deep along the top and bottom of the wing and force a carbon strip into the slice - narrow side visible. Something like www.carbonfiber.com.au/prod74.htm. Having a separate strip on the top & bottom surfaces of the wing would make the system act like an I-beam and probably be stiffer than a single arrow tube.
@AndrewNewton9 жыл бұрын
Lex Dysia I did exactly that for the Ultralight sloper wing and it worked very well. Just one 1m x 6mm x 1mm spar epoxied in to the bottom.
@gvet474 жыл бұрын
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.
@AndrewNewton4 жыл бұрын
I didn't't know any better, but it works OK
@recommit9 жыл бұрын
Nice work, I have been using a Dremel with a router base guided by an alloy strip for straight u shaped grooves to insert wing reinforcing to the underside of the wing, glue the spar in, then cover the wing. The Bixler 2 "kit" comes with a similar installation, but you glue a foam strip over the spar to cover it. I use aircraft single strand lock wire for my foam cutter. We probably end up with the same result.
@AndrewNewton9 жыл бұрын
Fixed Wing Rc Thanks, goos info. What thickness lock wire do you use?
@recommit9 жыл бұрын
I mostly use .032" lockwire. If you are anywhere near Moorabbin airport you can pick up a roll from Aviall or Aviaquip, or if you are in the country, I'm sure someone in a small regional aircraft maintenance facility wouldn't mind giving you a few feet. I have the occasional break and have been looking out for an old fan heater. The wire coils they use as heating elements are the correct material for Hotwire cutters. If you are anywhere near the Mornington Peninsula I can give you some lockwire anytime.
@AndrewNewton9 жыл бұрын
Fixed Wing Rc Thanks for the offer. I'm in Geelong. Pretty sure I can get some locally, marine chandlers carry it too. I'm happy with the fishing wire at the moment but I'll try all options.
@wardope7 жыл бұрын
i have only been flying quradcopters and tricopters Mostly FPV. after watching your video i ordred some foam. to build a flying wing fpv setup, as i have all the electroninc needed. along with Sonar GPS and what not. i can experiment with on a wing. looking foward to try it out
@AndrewNewton7 жыл бұрын
Excellent, good luck
@seaman82968 жыл бұрын
i think that you should use an airfoil that goes well with the low Reynolds number of an rc plane
@AndrewNewton8 жыл бұрын
Which airfoils would you recommend?
@andydodson57189 жыл бұрын
Hi Andrew, I don't know if you have a lathe, but before you dremel out a channel for a spar maybe drill out a hole if you have access to a lathe. I used a lathe that's only 660 B/C but I've had success drilling holes 600mm long (with the lathe tailstock removed) using a carbon arrow shaft in the chuck as the drill bit and then you can use the arrow shaft as a spar. I've found arrow shafts (about 8mm diam fm memory) to be cheaper at $8ea than buying carbon tubes from a LHS. You'd think that it would be difficult to eyeball 2 axes 'square' while drilling the hole, but I found it surprisingly easy.
@AndrewNewton9 жыл бұрын
Andy Dodson I don't have a lathe, but I thought about securing the drill to the table, using a sharpened arrow shaft for the drill bit and sliding the wing towards the drill.
@serdardemirci39967 жыл бұрын
Excellent job mate thanks for sharing!
@AndrewNewton7 жыл бұрын
Sweet
@TDH89884 жыл бұрын
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.
@AndrewNewton4 жыл бұрын
My pleasure!
@nigelkelseycouzens82665 жыл бұрын
Can you do a video on how you make your bow and what you use for tension please...........
@AndrewNewton5 жыл бұрын
My mate Allen Moore has done a better job than I can kzbin.info/www/bejne/Zpy4f6KQgtNlgZo
@gregkienle33785 жыл бұрын
Or, make a notch in the underside (flat side) of the guide ribs then lay your spar in...done.
@xxukrutt3 жыл бұрын
very usefull and to the point
@christheother90889 жыл бұрын
Very pretty section. Could you dial in a bit of twist?
@AndrewNewton9 жыл бұрын
***** Yes very easily.
@andrewCNC9054 жыл бұрын
if you go into a e-cigarette store you can buy assortments of resistance wires in any gauges for pretty cheap too
@AndrewNewton4 жыл бұрын
Yes I will try that when I run out of the fishing wire
@kiransadventures4 жыл бұрын
Making a hand launch glider out of foam will be fun. Plz make a try
@AndrewNewton4 жыл бұрын
DLG wings are an art form. Need fibreglass and carbon fibre
@valvegramp5 жыл бұрын
you can always use single strand fishing wire used for salt traces or stainless welding mig wire .. but guitar wire is thinner
@albertomaligne89337 ай бұрын
Cual cuerda usas de las 6 ?
@waynefelkey98212 жыл бұрын
Stainless steel safety wire works well.
@alexd7218 жыл бұрын
vidio cool . I use for cutting the same frame , only the heating wire of the d-0.8 Ni-chōme alloy wire . Clean cut turns out to 400 to 500 mm in length. :))
@mattivirta4 жыл бұрын
i have vape kanthal A1 wire, and cut fine but big wing no have smooth, what need do ? need wire tighten wery tight ??
@rfldss898 жыл бұрын
when I was about 10 y/o, I was trying to create airplane wings with some styrofoam. I drew the shape I wanted on the side of the styrofoam board and used a coarse windowsill to basically sand it down to shape.
@AndrewNewton8 жыл бұрын
+Rafael Dos Santos Wonderful, a natural aeronautical engineer
@bernarddeffodji54255 жыл бұрын
Thanks
@28th_St_Air9 жыл бұрын
great to see you evolving on to hot wire cutting. within the last few weeks I've been toying with the idea too and have seen where PC power supplies can be used as the source. I just so happen to have a pc power supply kicking around and some guitar strings too. I'm even more inspired to give it a go now. I've always been curious about how the outer and inner airfoil templates are lined up with each other prior to cutting???
@AndrewNewton9 жыл бұрын
28th St. Air Land & Sea I started with a PC power supply but it tripped the house safety switch when I turned it on so that went in the bin. So far I have just eyeballed the template placement but I'm working on a better system.
@kevinsraydatme9 жыл бұрын
28th St. Air Land & Sea Yep, I was thinking the same.. I thought about it and maybe a process like below would get them straight. 1.Draw line at 90 degrees on top of foam 2.Align template on inner template. 3.Mark spot on template which is directly under the line on foam 4.Copy mark location to outer template 5. Allign templates and cut. Probably lots of videos on KZbin about this. I am also thinking same, but using offsets and different size templates.. for Flying WIngs.
@Umbertosf24 жыл бұрын
great video thanks for everything
@AndrewNewton4 жыл бұрын
My pleasure!
@JetJockey872 жыл бұрын
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
@AndrewNewton2 жыл бұрын
Radical idea. Let me know how it goes
@flat-earther4 ай бұрын
did you succeed?
@Umarzaman84009 жыл бұрын
Thanks u so much is very very help full video good job my friend
@AndrewNewton9 жыл бұрын
umar zaman Glad it's useful Umar
@Umarzaman84009 жыл бұрын
Yes I use this airfoil and my flying wing is flying very smooth
@Umarzaman84009 жыл бұрын
And again thanks to you for this video
@glen39937 жыл бұрын
that is great work dude Thanks for the video
@門徒解說聖經6 жыл бұрын
Good video. Thank you
@arongatt8 жыл бұрын
you can use wire used for e-cigs , thanks for the vid
@imranrahim10807 жыл бұрын
nice video
@thejoshmoss9 жыл бұрын
Looks to have worked very well, for the spar, why not cut a channel across the bottom half way into the wing the glue it in with foam glue?
@AndrewNewton9 жыл бұрын
Josh Moss I'll be testing that today Josh. Thanks
@cesilieliljebakk26448 жыл бұрын
Very nice hot wire. Is it possible to use car batteri insteed of that you use
@AndrewNewton8 жыл бұрын
+Cesilie Liljebakk Yes it would work
@smellysam8 жыл бұрын
Thanks for the info. Needed this for a Uni project!
@AndrewNewton8 жыл бұрын
+smellysam Excellent
@smellysam8 жыл бұрын
Ok, got most of the parts in yadada. I do have one question: My profiles are 42mm high, 153mm edge to edge and 990mm long. Should I do the 990 in one or 2 pieces? I intend to glass the edges etc. Don't worry about the finish. Not for an aero model.
@AndrewNewton8 жыл бұрын
+smellysam 2 x 500mm halves would be much easier to cut. Sound interesting.
@BarbarossaTheOcean8 жыл бұрын
+smellysam Exactly, it is really helpfull! We are thinking to make a fpv uav for uni project but the thing is we cannot import some important parts such as camera, gps, autopilot system due to rules of Turkish customhouse. If we buy these stuffs in Turkey we will pay three times more.
@smellysam8 жыл бұрын
+Andrew Newton Done the cutter. 400mm to 500mm wide. 16.5V, 2amps, guitar steel E string. Controlled with a halogen light's slider. Works great, the only problem are the templates, I can't get the alu you are using (well, I can, but at 40€ the 40cm by 30cm sheet, they can keep it). I need to make 4 "wings", should I use cardboard or 1.5mm alu stock?
@EnglishTurbines9 жыл бұрын
Hi Andrew, I have wire cut a set for my CP50 Drone in the same orange foam...it has to be said that the accuracy of the airfoil is worth having as you get more lift and less drag than the folded Depron wing. Thats not to say the Depron wing is of no use, because they are lighter but it depends on the foam density...I use a Mains transformer and light dimmer for control of wire temp. Not seen a Lipo used for doing it before, so well done...I think your wire diameter looks a bit on the big side, a thinner wire will get hotter and offer less drag though, it did look a bit on the cool side to me? I always cut in two halves, upper and lower and use a balsa LE and TE butt glued on, its much easier and allows a really sharp durable TE. It is more work though...:(
@blakeguyan26629 жыл бұрын
If you're still looking for a way to do spar channels then simply get a metal rod of a slightly smaller thickness than your intended spar heat it and push it into the foam. just like your wirecutter but linear.
@AndrewNewton9 жыл бұрын
+Blake guyan Thanks Blake. Have not tried that method yet,
@nonsequitor9 жыл бұрын
+Andrew Newton It's the way to go I think personally: I use a simple plywood jig to keep it aligned and it works well on the thin 5mm foamboard I use. Also though, for bigger holes have you seen the hot ball drop method? Get a steel ball the right diameter, heat it up and then drop it vertically through the wing and hey presto.....
@janrozema76507 жыл бұрын
just an idea for a spar. I saw this in another youtube video (dont remember wich one). Use a square spar and then use 2 halfs of foamboard. cut out half of the spars. (diamond shape, not flat) ). glue them together and cut wing. then slide in the spar in (both wings)
@AndrewNewton7 жыл бұрын
Thanks for the tip. Interesting idea
@MatthewHeiskell6 жыл бұрын
Awesome! Do you have a video that talks about the all moving elevator?
@AndrewNewton6 жыл бұрын
Hi Matthew. Build videos for the 1.2m Acrobat and Le Fish cover the flying elevator construction.
@MatthewHeiskell6 жыл бұрын
Hi Andrew, thank you for the quick reply! I watched both of those videos. They were very informative like all you others. I am going to incorporate an all moving elevator on my next scratch build. Are there general rules about were to place the rod in the elevator? Between a quarter of the way back and a third of the way back from the leading edge of the elevator?
@AndrewNewton6 жыл бұрын
Sounds right, certainly no further back. Linkages and bearing must be as slop free as possible too
@AndrewNewton9 жыл бұрын
+dan garcia Cant reply directly to your comment due to your Google+ privacy settings. You need to use a new and clean knife blade to avoid pulling and tearing the foam, then this foam cuts like butter.
@rva19454 жыл бұрын
Metal A string is the one to be used? I keep the old metal strings after replacing by new ones.
@Shiftheads3 жыл бұрын
I think he Said E string
@davemason86569 жыл бұрын
So the foam wing out performs the Depron wing of the same size. That's interesting. Cleaner airfoil shape or is it the lighter weight that make that so? I know with Adams foam board you tend to get flat bottom foil shapes that work but aren't as efficient. Great video as always Andrew.
@AndrewNewton9 жыл бұрын
Dave Mason Thanks Dave. Weight, cleaner and deeper airfoil would all contribute. But to be honest the difference in performance is not as big as I expected.
@ПервыйПользователь-ш8ш5 жыл бұрын
We have had same cutting 50 years ago, Anatoli, Kiev Ukraine
@AndrewNewton5 жыл бұрын
Wow, long time ago
@juniodgoves7 жыл бұрын
ficou muito bom obrigado pelo videio
6 жыл бұрын
Junio Goves ae Junior blza, curte voo de colina tbm
@davidschmid8677 жыл бұрын
Instead of two lipo batteries you can also use a speed controller for a toy train to controll the wires heat.