Some dumb questions

[pyro]

So the plan is to build gas turbine motorcycle but i have a ton of questions,bit lost where to go....

1. which turbos do you recommend and on what should i pay attention while buying them(new one)

2. what type of engine should i build to squeeze the most out of it because im not sure where to go

-one turbo that runs another one, than shaft transmission,(kinda think i got too much loses here)

-same as above but adding afterburner(if that is even possible)

-two turbos to one afterburner

-two turbos each separate afterburner

and wait...dumb idea.... one turbo with enclosed afterburner and another one whit shaft(thinking about explosions and stuff..lol)

i did build one from scrap just to play with it...but now its time to go further

[racket]

A motorcycle has very limited "volume" for mounting all the necessary bits and pieces for a DIY turbine engine, so this limits what sort/size of engine that can be fitted whilst still allowing the rider to operate it without getting fried .

Thrust power , even with afterburn, is kinda whimpy compared to shaft horsepower from a freepower turbine arrangement .

It'll depend on what sorta speeds you want , what motorcycle chassis you'll use , what use you want from the creation..... etc etc ...................if you can answer those questions we might be able to give suggestions

Cheers
John

[pyro]

Thanks for the reply,bike is probably going to be made from steel tubes because it is esair for me to rebuild the fram like suzuki bandit or similar, dont going to drive that daily...straight line...more interesting to do high speed in straight line...300kmh or above

[racket]

If you want those sorts of speeds then lotsa shaft horsepower required ..............better have a look at Anders builds
jetandturbineowners.proboards.com/thread/53/landspeed-bike-diy-gas-turbine
and jetandturbineowners.proboards.com/thread/734/building-ju-02-gas-producer

Or an engine like Andy has built jetandturbineowners.proboards.com/thread/1025/hx-102-255-money-pit.

A very large Cummins HX82 turbo preferably with a >100 mm comp inducer for the gas producer and a large freepower stage wheel

Cheers
John

[pyro]

Yes iv already looked at some of those builds and im great fan of Andys build,been folowing his videos on Youtube, i was looking a year ago think on garret website a turbo with shaft output but dont know is that strong enough(just one hot side other side with shaft),it would save me a lot of machining since im limited there...i have plasma available,lathe but old and limited time to use...so i was thinking to use something like that...il try later to find link or picture to post here

[racket]

A simple turbo based freepower stage won't provide you with the required horsepower due to its limited flow capacity at the lowish static pressures and gas speeds that a freepower processes , the max you'll get is ~100 HP which won't get you the speeds you desire ................a turbo based freepower could be used with a split system where part of the gas producers compressor outflow is fed to a seperate combustor that feeds the freepower whilst the rest of the air feeds the gas producers turbine stage which has full expansion through it, but due to the relative small diameter of the freepower and high gas velocities the rpm will be >60,000 which makes for gearing problems

If you're looking at a fast build , forget it , its a few years work to get it all built and sorted :-(

Cheers
John

[pyro]

Thanks for making things clearer for me,so so two turbos feeding another one with shaft output is no good if i anderstand that coretly...the build wasnt planed to be fast...im yust tryng to figure in what direction to go...to get that horses on the wheels...i know its not simple...i spent a week yust to get proper fuel mixture in my last build(made completly from scrap)...but when it started i was happy as a child...oh and i burned evry single hair up to waste because too much propane....sorry for my bad english...

[pyro]

Maybe would be better to buy stages or whole engine?

[racket]

Hi

For the average motorcycle a mid sized turbo of ~60 mm comp inducer with its combustor as the gas producer , feeding the turbine stage of a large Cummins HX 80-82 with a 129/112mm turb wheel would be a reasonable basis for a possible build.

Otherwise one needs to use large axial turbine wheels from an aero/helicopter engine as the freepower if the gas producer has a larger compressor inducer .

Cheers
John