I want one of these go-karts

[Salted_Chipmunk]

http://home.comcast.net/~theonlymatt007/turbine/

85000 rpm turbine powered go-kart.

Yes please!

[That_Bloke]

Originally posted by Salted_Chipmunk
http://home.comcast.net/~theonlymatt007/turbine/

85000 rpm turbine powered go-kart.

Yes please!

We have the technology to build it!!

[Salted_Chipmunk]

I love you!

ummmmm i mean you rock :D

[That_Bloke]

Originally posted by Salted_Chipmunk
I love you!

ummmmm i mean you rock :D

I don't know about hydrogen peroxide though.......Seems like a poor choice of fuel for a turbine(for a rocket it makes sense), hydrogen peroxide is hyperglolic(sp?), it spontaniously ignites under certain circumstances, these include contact with anything organic(like perhaps flesh).

DumHead would be up for it too I'd imagine..............Homemade turbines can run on basically any flammable fluid or gas, LPG &/or Diesel are the common choices, upto 130,000rpm is common.

[leprchaun]

*Me drools



mmm go-carty goodness

[That_Bloke]

Upon inspection of their claimed figures my Bullshit-O-Metre is going off the scale.

They claim 1500hp: this seems highly unlikely, During the 60s both Rover & Chrysler experimented with gas turbines, for fuel economy these engines featured regenerators that did sap power & rpm but these engines were physically 4 times the size of that engine & they were only putting out 200hp for the Rover & 150hp for the Chrysler, in the late 60s-early 70s the Howmet TX race car was fitted with an ex-aviation multi stage turbine of slightly smaller size than the previous 2 but without the regenerator & it was only putting out 365hp.

Claimed torque at maxiimum speed is 2190nm:
Again this seems very unlikely, Both the Rover & Chrysler turbines could only manage around 650nm, The prime mover you'de find at the front of a road train only has 900nm-1600nm.

Furthermore if it's developing 2190nm of continuous torque let alone the 5000nm of peak torque there is no way it wouldn't just disintergrate that pissy 1inch rear axle & those tyres, Car axles are a good deal sturdier than that & you'll still have trouble finding car axles that don't fracture above 800nm.

they can't even agree on wheel speed, one part says 4500rpm, the other says 7000rpm: Either one of these as a rear wheel speed is just ridiculous, you just would never get any traction to the ground & you quickly reduce your wheels to a smoking pile of rubber crumbs & magnesium filings, building up to it is not an option as the engine is alledgedly a reaction engine & therefore not throttlable, you are at the mercy of the reaction, you get full power all the time & the only way to stop is to run out of juice.

With even just 4500rpm(let alone 7000rpm) on 270mm diametre tyres your speed should be exactly 228.906km/h, for 7000rpm at the rear wheels your speed should be 356.076km/h, if you have tyres of 310mm diametre the speed for 4500rpm will be 262.818km/h & 408.828km/h for 7000rpm.




They're so full of shit.

Edit: Speeds edited, I forgot to convert diametre into rolling circumference in the first calculations.

Edit: Speeds edited yet again, misplaced a decimal point,............even revised the speeds are unrealistic.

[7sean2]

Originally posted by Salted_Chipmunk
http://home.comcast.net/~theonlymatt007/turbine/

85000 rpm turbine powered go-kart.

Yes please!

Jesus H Christ!!! that's some fucking go-kart.Hold onto you're helmet!
p.s. Peroxide??? does that mean you have to be a blonde bimbo to drive one? (think's of lady driver's) Doh sorry!!!:p

[kré]

i think i'd be happy enough with one of these

http://168.9.26.28/GIXXERKART.wmv

[Drakin]

Anyone noticed at the end of the video it looks like it all went wrong.. *KABOOM*

As for 300km/h pfft looked more like 70-80km/h

[DumHed]

hmm, that's an interesting setup!

they've basically done a peroxide rocket engine, but are using the output to spin a turbine to drive the axle instead of using thrust.

I'm still downloading the video but I imagine it could work pretty well from a power point of view.
It'd be very expensive to run, but it's a lot simpler than a real gas turbine engine.

It makes me want to get working on my jet engine though :)
The parts are slowly being collected.

[Salted_Chipmunk]

crays kart > my kart :D

http://www.ringmini.de/English_Version/GSXR_Kart/gsxr_kart.html

[That_Bloke]

Originally posted by DumHed

It makes me want to get working on my jet engine though :)
The parts are slowly being collected.

I still gotta get the existing shaft out of the middle of my big compressor impellor
(Pictures are now Here (http://www.zgeek.com/albums/uploads/Turbo_Compressor_001.jpg) , here (http://www.zgeek.com/albums/uploads/Turbo_Compressor_002.jpg)
& here (http://www.zgeek.com/albums/uploads/Turbo_Compressor_003.jpg) ), I need to find or make a coulple of axial flow turbines of around 6 inch & 8ish inch diametres(respectively).

[DumHed]

apparently they can be made with sheet stainless steel and a lot of hand filing work.

I'm sticking with the radial inflow turbine setup I think ;)

[That_Bloke]

Originally posted by DumHed
apparently they can be made with sheet stainless steel and a lot of hand filing work.


Even mild steel but that won't last long, Inconel is said to be the funky shit in home made turbines but I don't know where to get it, I could go Ti, but Ti is hard to work & I can nolonger get it since I got myself(intentionally, I was going overboard) banned from ebay.

[DumHed]

inconel is designed for casting though isn't it?

[That_Bloke]

Originally posted by DumHed
inconel is designed for casting though isn't it?

Depends, I've heard of Inconel 250, Inconel400 , Inconel500 & Inconel 650

Inconel500 is apparently obtainable in sheet form, Inconel was apparently invented originally for making formular One exhaust systems.

[That_Bloke]

Originally posted by DumHed
hmm, that's an interesting setup!

they've basically done a peroxide rocket engine, but are using the output to spin a turbine to drive the axle instead of using thrust.


It's also interesting that their turbine appears to have blade profiling more like a compressor, it'd work but a conventional radial turbine would work better.

[DumHed]

I reckon the turbine looks like any normal turbocharger turbine. It's definitely a radial inflow type, but their turbine housing doesn't look as efficient as a turbo's one.

I guess they'd make up for that by pushing more pressure into it :)

My guess is that they've used a turbine and shaft assembly from a large turbocharger, mated it to a planetary reduction box, and added their own turbine housing with the catalyser for the hydroxide.

Personally I would have used a whole turbo, minus the compressor wheel and housing - which would give a proper volute for the turbine, a nice turbine, a set of bearings (including thrust bearing) and an easy to connect to output shaft.

[That_Bloke]

hmm, that's an interesting setup!

they've basically done a peroxide rocket engine, but are using the output to spin a turbine to drive the axle instead of using thrust.


Recently I'd had some odd ideas of using just the turbine side of a small turbo charger to make a hydrogen peroxide & petrol or hydrogen peroxide & methanol turbine, scouring the forum last night I found this thread again.

I'd also had ideas of making small piston engines powered by hydrogen peroxide & methanol,, being a reaction engine & not air breathing but rather relying on a chemical oxidant it could probably run under water.

[DumHed]

A rocket engine with torque :)

If you want a turbo to experiment with I have a few kicking around.

[Directed]

URL not found! Bastards, now I can't see it.

[oggy]

URL not found! Bastards, now I can't see it.

seconded...bastardo`s


crays kart > my kart :D

http://www.ringmini.de/English_Version/GSXR_Kart/gsxr_kart.html

i`m all wet in the pants...