Good Turbine For Car.

[stoffe64]

How about RollsRoyce Gem?
About 1000hp,relately small,prices from 5000 gbp and up
Cheers/stephan

[aquaticharpy]

Oct 4, 2019 2:08:48 GMT -5 stoffe64 said:

How about RollsRoyce Gem?
About 1000hp,relately small,prices from 5000 gbp and up
Cheers/stephan

Know where I can find one of those for sale in working condition?

It did look like a nice turbine.

Thanks.
~John 

[jetric]

Oct 4, 2019 8:22:28 GMT -5 aquaticharpy said:

Oct 4, 2019 2:08:48 GMT -5 stoffe64 said:

How about RollsRoyce Gem?
About 1000hp,relately small,prices from 5000 gbp and up
Cheers/stephan

Know where I can find one of those for sale in working condition?

It did look like a nice turbine.

Thanks.
~John 

  Hi John,
   You can get them from my friend Harry here,

  www.jetenginetrader.co.uk/

   He has around forty of them plus loads of spares for them.   Obviously you would have to pay for the shipping as well, but he can arrange that for you.

 Richard S.

[aquaticharpy]

I sent him a message!

Thanks!

[aquaticharpy]

Are there any good ways to reduce the spool up lag on a turbine for snappier performance?

Thanks

[racket]

NO

Thats one of their shortcomings , thats why they often run high idle speeds , certain "variable" devices can help , but unless they are part of the original engine design , theres not a lot we can do .

Light weight rotors will accelerate quicker , the throttle on my TV84 turbo bike gave engine responses very similar to an IC engines , but its rotor was relative light compared to my latter larger engine/s , also, it had a generously proportioned combustor with a "lowish" combustion intensity.

Our turbocharger rotor based turbine engines have probably the lightest rotors for a given mass flow and as such give the best acceleration rates , something that was very important for reducing "turbo lag" when the turbo was mounted on the IC engine , once up to mid power settings the rotor accelerates very quickly , if you checkout the P2 gauge in the vid of my 12/118 engine in this vid www.youtube.com/watch?v=U_Ltkxa-Ddk you can see it doesn't take long to get moving .

Turbine engines are happiest as a steady state engine where components can be designed accordingly for maximum efficiency at a predetermined rpm range ..............they do not make good "sports" engines where the throttle is continually changing ...............its a case of "horses for courses" , piston engines with "fixed" compression ratios are better at accelerating their "rotors/crank"from low rpm whereas turbines with varying compression ratios depending on rpm of the compressor are poorer due to the low compression/expansion ratio at low rpm as it tries to accelerate the rotor.

[aquaticharpy]

Ok. How would I seperate throttles? Or would both throttles be hooked to the same pedal?

What would you reccomemd to control the turbine throttle?

Also, do you think it would be possible to use the turbine as well as the motorcycle engine for a sort of 4wd setup?

Thanks
John

[racket]

Hi John

Theres no way your "low power" engine will cope with the acceleration/speed of the "large power turbine" engine , the low power engine will need to be shut down and power disconnected from the wheels , or you have some sort of "over run/freewheel" device , but don't try having both on the same throttle unless you want a heap of problems .

From all the questions you have asked, its obvious you have little experience with mechanical devices , so I would recommend that you do NOT attempt this built.

Cheers
John

[aquaticharpy]

Thanks! 😁.

The low power engine is a Yamaha motorcycle engine with 148hp for fuel efficiency purposes. It will be connected to a 5 speed manual on the front tires~ meaning a neutral gear can seperate it out from the large turbine when needed. I would have though that its acceleration would surpass a turbine, giving the turbine time to spin up~ at which point I'd clutch and go back to neutral. Being on turbine power.

Everyone's gotta learn somehow, and I've learned quite a bit.

I'm just trying to think up a way of 2 seperate ways to control throttle. ~Perhaps a manual switch that disengages/connects one cable to a pedal?

Sorry for the turmoil I've created.

~John

[racket]

Hi John

I'm just concerned that you are getting in much deeper than your experience will allow with any degree of safety .

LOL, with a 148 HP bike engine , why add the turbine ................you were talking about a small motorcycle engine before , hence my comments in the last email

You'll find that there is generally "sensory overload" when the turbine fires up , trying to juggle an IC engines control as well as the turbines is asking for problems unless you have some pretty good automated controls.

Unless you can convince me otherwise , I'll stay with my recommendation that you don't do this build

Cheers
John

[aquaticharpy]

Then what build do I do. I'm going to do a turbine powered build and I have a body without an engine.

John

[racket]

Hi John

You are expecting to achieve what the major car manufacturers failed to achieve after expending huge amounts of time , energy, resources and money , you need to lower your expectations .

One of the first difficulties is that you have a "body" that you hope to mould into shape to fit your desires , that body/chassis has its limitations , it was meant to have a flat 4 VW engine in it , you lump a bloody great 300 HP turbine into the back of it and you'll have all sorts of problems.....................then you wish to complicate matters further by endevouring to fit a SI "runabout" engine in as well .

If your "body" was already a front wheel drive vehicle it would be "easier??" , but it would still need to be strong enough to cope with the turbine .

My suggestion is , find a small 50 HP turbine with freepower , install it in place of the VW engine and live with the limitations, ............it'd be a turbine Bradly GT, .........use it for limited outing .

The other alternative is a small single shaft APU and mate it to one of those infinately variable transmissions to hopefully provide a reasonable power supply .

If making a turbine vehicle was easy , they'd be everywhere , they aren't , so that should tell us something about whats required in building one .

Cheers
John

[aquaticharpy]

I have adequate room under the rear window to rear engine bay. I'm no longer expecting good acceleration or gas mileage. I'm expecting a decent amount of power to get going and have a nice sounding turbine for shows and rare outings. It will not be driven much at all. Mounting some sort of small low hp motor is not a necessity whatsoever but it'd be a welcome luxary. If I were to mount a small motorcycle motor I'd chain drive it to the front axle so the transmission would stay in the pedal area. Due to the turbine being a rare use option I'd most likely have the IC engine on the pedal and the turbine on a control panel in the center console. The actual throttle would be using a hand throttle next to the control panel..

Thanks
John

[aquaticharpy]

Just throwing it out there, if the free power section on Boeing turbines acts as a torque converter, couldn't you add a shift brake to grab an output disc to slow, even stop it when going from reverse to drive?

How well do these engines start with the free power section bound?

How would a CVT do as a transmission?

Thanks
John

[racket]

YES
OK
OK