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Thread: Turbine powered trike
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17th Oct 2019, 04:42 AM #16
Thanks Mr Steve,
LOL!!! yeah and hang on for dear life that's what he told me and he won't ride on ice any more, more safer on land. When i discovered the internet back in the 90s that's when i wanted to build a turbine engine, my first engine was using a large turbo charger into a turbo jet and then i met Mr John Wallis he help me out a lot and he is part of a small group he in OZ and around the wold. We are on a web site Home | JATO -Jet and Turbine Owners- were other members share there knowledge and project builds. John built his jet bike before the internet using a TV 81 turbocharger https://www.youtube.com/watch?v=eUtDSjVZCUQ He is still building engines and pushing the limits on these turbines. When i was a kid my folks got me a capsela set i had so much fun with them and that started my interest in anything Mechanical.
Cheers,
Mark.
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17th Oct 2019, 11:35 AM #17Most Valued Member
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Thanks TB. Interesting journey.
I'd never heard of Capsela - had to look it up on Google.
Looks great, and I see its been renamed to "IQ Key".
We've got 3 grandkids under 5, I don't think the granddaughter will be interested, but reckon the 2 boys could be right into it when they get older.
Steve
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17th Oct 2019, 02:55 PM #18
Girls do engineering too.
She might be Steve, I loaned a mate a copy of Phil Irving’s biography and his 30 year old daughter read it and now she’s doing engineering at Uni.
On the trike it’s single wheel at the front?
Not like a Morgan ? stability will be interesting
One of my wife’s nephews in Canada had a helicopter turbine, he was going to put it in a hot rod of some sort.
H.Jimcracks for the rich and/or wealthy. (aka GKB '88)
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17th Oct 2019, 08:49 PM #19
Yeah single wheel at the front, i did not won't to cut to much off the diff for stability. I don't plan on going around corners at high speed. Yes MOTORCYCLES | Marine Turbine Technologies - The Leader in Turbine Technology uses a helicopter turbines in there
Turbine Superbike and they build turbine trikes as well.
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18th Oct 2019, 07:27 AM #20Most Valued Member
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Man very interesting. This stuff is next level! I was always intrigued by your user name, now I know the significance.
Looking at the last pic of that trike, I notice it has a curved profile on the rear tyres. Is there a reason for that tye of profile or is it a case of style and aesthetics?
Also, how do you aquired a helicopter turbine (or any turbine for that matter) without re-mortgaging your house? They can't be cheap!
Thanks for sharing, I'm going to enjoy watching this build.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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18th Oct 2019, 02:22 PM #21
Hi Simon, no worries mate glad you are enjoying the build thread Yeah i was thinking i should share what i do for a hobby. i don't really know why the tyre has a curved profile, all i know is they are bloody expensive. I think the Y2K jet bikes were $145000 USD and you can't power out of a corner on these bikes only good for straight line runs, you can buy use turbine engines on Ebay USA but for the good ones not cheap, the cheap ones are well used and to find parts are hard to find, that's why we build our own engines using off the shelf parts. We get casting made up and machine them to spec, use turbocharger parts and fabricate flame tube and do more machining parts of the other parts that are needed.
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20th Oct 2019, 03:39 AM #22
Hi all, a side note on how we get shaft horsepower of the turbine. John Wallis had his jet bike published on the Popular Science magazine a while ago, will show you how the bike works. Also a vid of a dyno run we did as well. That two stroke motor you hear is to run the high pressure fuel pump. https://www.youtube.com/watch?v=IHeqyb6fMFA&t=2s
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27th Oct 2019, 05:42 PM #23
I finish off making the welding jig for the diff, using 30mm round stock and machine up aluminium pucks. I need to clean out the diff housing again, needs to be supper clean, i lost count on how many times i have clean it but still finding bits of gunk and a bit of metal chips from drilling and tapping the holes. Should have it welded up this week.
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7th Nov 2019, 02:29 PM #24
Got the diff welded up, the tubes are a bit distorted from welding. The 30mm bar is stiff to rotate, there will be more welding done on the diff as i need perches welded on as well and i would like to grind the welds down flat and re weld just to make sure the tube is sealed.
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7th Nov 2019, 03:02 PM #25
Been doing a lot of head scratching and made a mockup of the structure that needs to be made for the diff and gearbox. It needs to be fairly decent structure between gearbox and diff to handle the chain pull of >500 kgs.
So used some scrap tubes to make the mockup, will be using heavy wall box tube once i am happy with this set up. I have to weld on four diff perches on the diff tubes and this will contorted the diff even more. Here is one more vid of the jet bike last run front view, you will see how quickly the bike accelerates this why the structure has to be robust. https://www.youtube.com/watch?v=g4c5by5LPxQ
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7th Nov 2019, 05:03 PM #26Most Valued Member
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Thanks for the updates. You're making great progress.
Have you had a look at the typical mounting structure for the engine in its production role? If not I think you'll be surprised just how light the structure is.
I'm assuming you're direct coupling the driven turbine output to the diff, and not having any form of clutch in between? If that's the case then the torque application will be very smooth, and the structure doesn't have to cope with any shock loading compared to eg a manual clutch vehicle at launch. The highest load would likely be a spinning tyre that grabs.
Just implying that the structure might not need to be anywhere near as heavy as you think it does. Wish I had design engineer skills to give something definite, but I don't. Can only offer my thoughts from working around turbine engines in the past.
Couple of questions:
1. What method did you use for the housing welding. I'm guessing you used MIG? Did you tack in a few places then run a root pass all the way around followed by a few more passes to build it up, or just do it all in one pass?
2. What is the plan for the diff center? Some sort of limited slip arrangement or just an open center?
Loving the build - keep up the good work
Steve
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7th Nov 2019, 08:50 PM #27
Hi Steve,
Glad you are enjoying the build and thanks for the comments. Yes have had a look at the mounting structure on the engine and will be using the same mounting structure for the trike, you might can see in this pic in Anders bike frame. Yeah no clutch and will use chain and sprockets and yes your right it is a smooth acceleration. But the gearbox is heavy about 40 kgs maybe a bit more and the two mounting points that hook up to the frame i don't really like as those two cast bosses on the side of the gearbox housing are for accessory Drive units and are not for holding the weight of the gearbox, so i have to make a suitable structure to hold it in place, the tube will be 3mm wall. I use my mig and made tacks all around the tube and then did a root pass and that was it, so maybe grind down flat and weld again? I just had a chat to someone else about this and he said as i have used a solid bar one piece bar with 4 contact points wheres in actual use, the diff is clamped in the center with the two half shafts having a single bearing at the ends and a loose sliding fit into the diff at the other end. There is plenty of room to accommodate slight misalignments. The diff will be a open center.
Cheers,
Mark.
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7th Nov 2019, 11:12 PM #28Most Valued Member
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That is an awesome project you've undertaken.
I know this a stupid question, but is there an afterburner to go on this also, if it works like a fighter jet, I'd be really hanging on.
KrynTo grow old is mandatory, growing up is optional.
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8th Nov 2019, 04:54 AM #29
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13th Nov 2019, 07:35 PM #30
I spent the whole day working on the the structure for the gearbox and diff today, this is what i have come up with the build so far.
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