noshell
Junior Member
Joined: January 2020
Posts: 81
|
Post by noshell on Apr 1, 2022 15:22:18 GMT -5
Just had a thought today. Has anybody done it before?
Seems like a good candidate for a gas producer atleast.
|
|
|
|
Post by racket on Apr 1, 2022 16:23:25 GMT -5
|
|
|
|
Post by racket on Apr 1, 2022 18:21:27 GMT -5
|
|
noshell
Junior Member
Joined: January 2020
Posts: 81
|
Post by noshell on Apr 2, 2022 0:18:19 GMT -5
Nice.
I like the idea of having a road legal turbine bike.
|
|
|
|
Post by wannabebuilderuk on Apr 2, 2022 17:18:21 GMT -5
Nice. I like the idea of having a road legal turbine bike. Check out the y2k bike then |
|
noshell
Junior Member
Joined: January 2020
Posts: 81
|
Post by noshell on Apr 8, 2022 2:31:27 GMT -5
She is a little bit out of my budget haha
|
|
|
|
Post by racket on Apr 8, 2022 4:21:03 GMT -5
Yeh , the Y2K is an overpriced , overpowered, overlong , overhyped and overthirsty machine............other those few faults its an interesting bike ;-)
A good turbine roadbike needs no more than ~100 hp to keep fuel burn within reason and negate the need for the Y2Ks 34 ltr fuel tank and to extend its 20 mile around town range .
To have good handling we need a reasonable wheelbase , the Y2Ks rather stretched length is OK for straight lines but lets forget the corners .
A lightweight 100HP turbine engine would make for a 150 kg bike weight rather than the extra 100 kgs of the Y2K .
At 150 kgs and ~100 hp you end up with a civilised bike rather than a bike that would soon become "uncomfortable" to use ............excessive horsepower generally makes for a less than nice ride .
LOL..............just the thoughts of an old rider :-)
Cheers
John
|
|
noshell
Junior Member
Joined: January 2020
Posts: 81
|
Post by noshell on Apr 8, 2022 16:09:48 GMT -5
I think youve got the right idea John.
To be honest, id be happy with 20hp.
Ive ridden bikes around with sub 30hp, thats plenty for a cruise. Id rather it was rideable and not stupidly loud.
A helicopter engine is just insane. If i want speed ill hop on my sportsbike.
Edit: i havent come across any turbines like the above (i rekon 50hp would be the sweet spot personally), so i guess ill have to make one.
Ive got my lathe now, so at some point i will make a start.
|
|
|
|
Post by racket on Apr 8, 2022 16:53:25 GMT -5
I can relate to your 20 hp , I was thinking a similar number when I made my TV84 based bike, but had no idea what or how to produce it back in 1990 :-( This is what a turbine bike could be like jetandturbineowners.proboards.com/thread/34/motorcycle-project any bigger engine and we start to need a "special" frame geometry , this one is pretty lightweight and should produce the same power as Anders 304 kph landspeed bike as the engines are "cousins". 50 HP will only need a modest sized gas producer , a 50 lb thrust engine , roughly 1 lb/sec mass flow . A fun ride is much more that raw horsepower :-) Cheers John |
|
dieselguy86
Veteran Member
Joined: September 2014
Posts: 186 
|
Post by dieselguy86 on Apr 8, 2022 19:31:56 GMT -5
Gerald Rutten's website has plans for an engine that would fit your needs pretty well. It's not "industrial" quality (sealed shaft tunnel, closed loop oil system) so it'll need rebuilt more often, but atleast you have a solid set of plans to build from, taking alot of guesswork out of it. The compressor needed for it is available from kts. -Joe
|
|
|
|
Post by racket on Apr 8, 2022 21:48:55 GMT -5
Hi Joe
Yep his biggest engine would work nicely , even with 25 hours between bearing changes thats a lotta rides .............LOL, and a lot of fuel to buy :-)
With very good balancing and a dedicated "filtered and cooled " air supply to the bearings, that TBO can be extended considerably as theres space on a bike for the extra bits required .
Cheers
John
|
|
dieselguy86
Veteran Member
Joined: September 2014
Posts: 186
|
Post by dieselguy86 on Apr 8, 2022 21:55:57 GMT -5
Hi John,
Not to mention, one thing I've learned with my wren 44 heli engine, is that turbo-shaft engines don't run at 100% throttle as often as thrust engines. Saving the bearings even more. I bet you're right, run a filter on the engine and id bet those bearing services could be pushed to 100 hours.
-Joe
|
|
|
|
Post by racket on Apr 8, 2022 23:20:41 GMT -5
Hi Joe
Yep , instead of feeding the bearing air at close to 200 deg C which doesn't do much for the lubricant , if its reduced to 30-50 degrees its gunna help , and if the air is filtered those fine bits of airbourne dust don't get a chance to grind the bearings away .
As you say , a 50 HP turboshaft engine would rarely be run at full throttle the same as a 50HP IC engined bike rarely sees max RPM , probably <5% of the time , at a guess I'd imagine ~60% N1 would be an "average" for a bike out on a ride .
Cheers
John
|
|
noshell
Junior Member
Joined: January 2020
Posts: 81
|
Post by noshell on Apr 9, 2022 7:23:32 GMT -5
I stumbled upon the "solar mars t41" engine. A measly 50hp, however the thing is bloody massive. Too big to pop in to a motorbike frame.
Why is the thing so huge for such a low amount of power?
On a side note, if i do make a turbo based gas producer, itd be journal bearing so basically maintenance free.
I allready bought a new 40mm inducer turbo. I was hoping for something like 20hp. Based on that thing above though it looks like something this small will make about 5hp haha. Not ideal.
|
|
|
|
Post by pitciblackscotland on Apr 9, 2022 11:18:51 GMT -5
|
|
