Pulsejet powered World Models TameCat RC plane, maiden flight

[CHELLIE2408]

I really enjoyed the Tame Cats Build and Maiden Flight, I know that air bubbles in the fuel will shut down the jet, Question ? would a bladder tank and springs in the fuel line at the fuel injection spray valve help to eliminate air bubbles and keep the jet running, and would a on board ignition system or a glow plug help to keep the jet running, just my 2 cents worth, BTW I really enjoyed your Hummor and Aussie Accent :) :) :) Take care and have fun, Chellie in So. Calif, USA

[scflyer55]

Back in '76 by buddy and I first fired up his Redhead pulsejet in the alley in about 4 ft of snow.

Just for the heck of it, we tried some stating spray (ether) while it was running. Talk about a spectacular exhaust flame! It cooled the tube too- the color darkened momentarily, but the sound was awesome. It would be cool if you could figure a safe way to inject short bursts for flybys!

[Aragonman567]

Sweet

[w00kiey]

awsome 

[JontyKilpatrick]

Saw your FrSky review on hobby king - Impressed.

Have you done or know anyone who has done a FPV "how to" I'm finding it difficult to understand what lit is needed and what the options are.

[tomken8dy]

For the money, pulse jets are the most

efficient jet./rocket engines ever made.

That why they scare governments.

They're cheaply and easily made!

[WarblesOnALot]

@xjet Ah, just found this. Epic ! The Kerosene-Powered Flame-Farting Flying- Didgeridoo... ; Yahoo ! I still have an old 70's Advertisement for a pair of these, on a Hang-Glider's A-Frame, fed by a Butane Backpack...! Reportedly, when tried, it pitched up uncontrollably, then stalled & slid backwards to crash ; and then it burned, when the Jets lit the Dacron. Pulse-Jet & Weight-Shift, bad combination !

Ciao.

[1stMrSceptical]

Nice one Mr Simpson 

[benkenno1]

the veteran

[racunavBigRod]

very nice...congrats....and thank you for the teaching...

[7249xxl]

so how does a pulse engine works?!?!? >>>>>

[MrCommonlane]

i know its a stupid question but how much dose the puls jet weigh and is it more eficent than a turbine i am only asking these question because were we fly your not aloud turbins

[xjet]

@MrCommonlane The pulsejet engine weighs about 680 grams. They are not as efficient as a turbine and *much* louder ;-)

[scflyer55]

@xjet Die Wunderwaffe ist ein Erfolg, Herr Simpson!

[MrCommonlane]

@MrCommonlane ok thank you for your help i was wondering becase that plane has such a epic glide on it

[VardanB92]

Now that's what I call an RC plane :)

[EnglishTurbines]

Thats great, I assume you are using ordinary petrol from the pump?...Why dont you use a pressurised tank?...IE an aerosol type container you can then pressurise with air and a regulator on it to give constant feed pressure to the liquid tank. You just open the fuel feed after the engine starts up....:)...Constant setting regardless of flight effects.....:) I make my own turbine engines BTW..:)

[xjet]

@EnglishTurbines Having a pressurized container filled with petrol onboard an RC model is decidedly unsafe. Should something go wrong, it could become a massive incendiary device ;-(

[EnglishTurbines]

@xjet No, I dont think you understand. A small metal can is pressurised with say 80 PSI. You then use an air pressure regulator to pressurise the fuel tank....just 0.25 PSI will give a consistant flow and a reliable run. Pulse Jets are poor at sucking fuel, like most engines for that matter. This WILL cure your lean outs...trust me. Failing that you could use a small electric fuel pump like we use on our gas turbines, but the pressure method is simpler for the simple Pulse Jet.

[xjet]

@EnglishTurbines My engines have a pressure tap on them so I actually get about 2PSI of pressure from the combustion chamber to push the fuel through when they're running. However, on this model there is a very large difference between the fuel-jet and the tank level so when you pull very high Gs, the pressure is not enough to compensate for the fuel-head.

[EnglishTurbines]

@xjet Yes, but you forgetting, pressure conditions in a Pulse Jet change during flight, and so will your pressure from your tapping point. You need something constant which does not rely on pressures generated from within the engine itself. Your tapping point will also pulse...just like the engine itself does as the pressure wave travels back and forth along the engine.

[xjet]

@EnglishTurbines Due to the elasticity of the gases involved, the choking effect of the small (0.8mm) orifice through which they must pass and the mass of the fuel, a huge amount of integration (smoothing) takes place so that the resultant pressure in the tank is surprisingly stable. It's a system that works very well on my other aircraft but they only have a fuel-head of about 3-4 inches. On this one it's closer to 8 inches when the tank is half full.

[EnglishTurbines]

@xjet Yes, the Tank is low compared to the engines position on this bird. The Doodlebug used a spherical pressure chamber to keep it fed with petrol during flight. If you could use your system, then for sure the Germans would have done the same, as its simpler....but its not reliable.

[davidrodgersNJ]

Given how simple they are, I wonder why pulse jets aren't used in full-scale aircraft. Are they inefficient users of fuel?

[xjet]

@davidrodgersNJ Traditional pulsejet engines are rather inefficient and very noisy.

[javiercaselli]

@davidrodgersNJ A pulse engine are extremely inefficient when compared against a moder turbofan engine. Also, it's impossible to implement on them a decent throttle on them, they're optimized to run "effiently" at a certain fuel/air intake ratio. Pulse engines are similar to afterburners in a fighter jet, they provide a constant amount of (extra) thrust in a relatively simple way, but simplicity comes with compromises, the main ones being the lack of control (throttle) and fuel efficiency.

[tnhl77]

@davidrodgersNJ not reliable hard to start Fuel hogs I could go on forever

[MrCoyne53]

All I can say is, thank heavens you didn't work for Germany in WWII. ;-)

[EnterpriseXI]

do Pulsejets have throttles?

[xjet]

@EnterpriseXI Not usually -- but watch this space :-)

[ryno2085]

For ages I've seen vids of ppl on youtube with pulsejet engines, showing that they work, but not showing them actually propelling anything lol. Thanks for demonstrating they can be used for something :) looks like fun!

[kryptiea]

wow nice build

[Floydman423]

imagine one day yo where pulsejet engines replace jet engines in transportation.... i believe that one day that imagination will be a reality.

[johnhassle]

@Floydman423 You're a dumb fuck Don't open your mouth again faggot.

[davidrodgersNJ]

Given how simple pulse jets are, I wonder why they aren't more widely used. Are they very inefficient in fuel use?

[PMDGFlyer]

@davidrodgersNJ Maybe, but they probably wouldnt work very well at high altitudes because there isnt enough oxygen. And thats why turbine engines have compressors. (correct me if im wrong)

[madnesscombat5]

hey. The guy flying the plane, isnt he the one who builds lots of pulsejets and also designed some really big ones?

[popsaka1]

Too fast... but exciting none the less! Maybe some sort of deflector in front of the air intake to reduce the wind's influence??

[imjustwonderful]

bet those off-roaders in the background was all WTF was that?

[UnconventionalDice]

Sweeet landing ^_^

One day I'll own one of those motors (just the motor, yeah, I'm that kind of nerd ^^U )

[bassl0va]

Could you use one on a RC car or boat? Also, could you message me plans for a engine which is 15" or less long?

[sbglobal]

Have you ever considered building a RC V1 flying bomb to go with that pulse jet motor

[sbglobal]

Hello Bruce

[gxz100]

what type of fuel is that?

[xjet]

@gxz100 It runs on regular gasoline with just 1% oil to ensure that the valves don't rust when the engine isn't being used.

[fillopygeesi]

Does those not have throttle control?

[HALOFREAK9715]

now attach a payload like waterballoons

[sircatoa]

por la forma de las alas , pense que se iva a hacer mierda

XD

[motordude1234]

was there a motocross track in the backround?

[xjet]

@motordude1234 Yep.

[NautilusDubstep]

@xjet have you ever thought about building a plane with pulse jet that could run for alot longer on a larger fuel supply and maybe be able to be throttled so you can control your air speed?

[Sidewinder9877]

holy shit that things fast!

[monimstarfox]

almost the save coveralls we use in school

[sz42781]

tremendous power

[JOCKATEO]

thats what happened to my metal bong

[MrJp990]

lol it sounds like a REALLLLY long fart XD cool plane dude :)

[duran0784]

that's pretty kewl.. i'm just learning about the pulse jet engine. it looks like to me from looking at other videos that the valveless would create less thrust, wasting combustion. were you blowing air into the valves for start up? is the fuel suppy or feed a big issue with these?

[Dougiedogg13]

Dont fly this over London!

[trexeater101]

i didnt know something this decent was happening in the new zealand rc world

[dtiydr]

Dam that flyes..

[cobra18t]

Wow that thing is quick! Do you have any idea what kind of fuel consumption you are getting on this engine, say in ml/min?

[jogga123]

Landings don't get much better than that.

[mcmatrix58]

Sheet Bruce that took off like a cut Cat!

[41stgaming]

cup of coffee? is he dutch? :P

[agentolshki]

ive never seen an rc v1 with pulse engine, that would be cool.

[MiG21fan]

Epicness. I love that pulse jet sound. They should make a ju-161 lilli

[heli121212]

awesome! i want 1!

[bluedog1976]

Evening Bruce, Hows the Tamecat coming along? Been watching with great interest here in West Oz.

[A6Intruderman]

Very nice! I had thought that pulse jets had gone the way of the Pterodactyl. Nice to see that some are still flying. Definitely a change from the norm at the flying field.

[jimnrel]

Yep fast...

[mabolzichjjl]

damn! that plane is VERY impressive.. picture perfect landing too

[wnd711]

now if i remember Jeff Troy..original designer use to live in NJ or Pa. ,He might also be editing a magazine"backyard flyer" or something to that effect if he see's this it would be nice*****

[LenapeFireTurtle]

Very nice!!...Yes, a cup of coffee to finish off a good test flight.

[degimedia]

congrats

[BlakeMason2]

Great landing!

[MaxwellForce]

Nice! :-)

[meowtuna]

Fantastic!

[1metiz]

Good to know a man of your age can still get it up :D Haha! ok to easy sorry

But good job, nice write-up

[jacebigelow]

5-STARS !!! This is really cool - so glad i subscribed ! :)

[tutor4011]

well done. iv followed this plane nice to see her up

[scflyer55]

"That was a bit exciting!"

Far out Bruce!

Seems to be a great platform for the pulsejet. Nice work as always, Sir!

[TeckPriezt]

Well done Bruce, got to be one of the best conversions for a RC aircraft box set I've seen.

[400chevlc]

Congrats Bruce.

[w7mag]

Nice!!

I bet anyone living near your flying

field must love you guys. ;-)

That motor sounds like the sky is

being ripped open..

[thekneedrag]

Nice... ;-)

[MaEtUgR]

speed! it's so fast, nice work ^^

[trance183]

Beautiul. Great job!

[shoopwhoopX]

WHOOOOOOOOO

[PERIZ99]

Killer thrust...!

[sheldonholy]

Brilliant job, great work!

[sheldonholy]

This is a trainer!

[bwilli93]

Very nice test flight. Great looking jet. Thankyou for your hard work

[d3jsp]

wow... this is awesome...

very nice first flight! (no hesitation at all lol...) it just accelerated out and took off lol!

[tostrong4you]

wow, it landed even though the motor was off for so long, that was awesome!

[shaneeeeak]

well done! 5*

[startazz]

Nice one mate and we can say that was a great little maiden even if it did cut out because it went to lean,can't wait for the mods to be done so we can see a longer flight mate = 5*

[0TOM007]

lol! great vid, i remember you saying this won't be as fast as other pulse jets, but damn that thing is fast!

[MartijndeGraaf1001]

congrats! your plane didn't fall apart under these forces. wow such a speed!

[peterrumble]

well done Bruce! excellent flight..must also thank pit crew member Barry! excellent job barry! It seem that you have made him a bit of a you tube star bruce!

[pyrexia2]

Looking forward to the next flight,love it.

[philipeagles]

Not for the faint hearted perhaps?

(not trading in my Easystar just yet)

[TheUllhue]

congratulations! Exiting plane good landing.

[foamflight]

Amazing! your engines are incredible, great job!!

[skorpaki]

Congrats!!!

[CarAudioGuy21]

wow fantastic vid :) sounds really wicked

5 stars

[Free07Style]

Great, congratulations! Excellent landing!

[kiwibob72]

FANTASTIC!!! .... and here is me thinging one of these with a nitro motor would need to be replaced after learning is over!

Apparently not! (ps, who has these 'standard' tamecats in NZ??)

[xjet]

TopRC had them but I think they've sold out. it seems that every time I convert an ARF to pulsejet power (Long-EZ, BobCat, TameCat) the supply of the airframes dries up almost overnight. I wonder why that is? :-)

[rockonmyfriend]

@kiwibob72