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Messages - Flettner

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General Two Stroke Talk / Re: TPI
« on: May 13, 2019, 04:14:32 PM »
Opps, sorry Ron , for some reason I always thought it was Ray? Please accept my apologies.
Im keen to post on my mk2 system but have promised TM I will keep mum about it at the moment. In the next few months will be make or brake, Im about to finally finish my 360 rotary valve revers cylinder mk2 TPI engine, Ive told TM if they do not do something with mk2 TPI by then, I'm publishing it, here.

I can and will post some update pictures, just with a rag over the cylinder for now, there is a lot more to this engine  apart from just the mk2 TPI.



General Two Stroke Talk / TPI
« on: May 12, 2019, 06:20:22 PM »
A big thank you to Ray Smith for resurrecting this site. Rebooting all the old stuff on My Fuel injection development has paid dividends in terms of a resource  to show time lines for the development as it happened in real time. KTM recently tried to patent the TPI system, claiming they invented it. Actually a recent article put out by KTM now claims they accidentally " discovered'' TPI in 2014 , perhaps here on TSM I would say , but never the less a patent was applied for. TM, understanding that TPI was free for any manufacturer to use has set up and is starting to sell 300 TPI enduro bikes. They were unhappy that KTM tried to pull this greedy trick. They came to me for help to stop this patent application, understanding that I had done TPI first and published it . I pointed them to this web site where there is a time line on development. I have heard that the KTM patent application has been declined because of the appeal TM has put up, using TSM as a heads up. So this means TPI is now free for any manufacturer to use. Good for twostrokes.

Go buy a TM ;D

General Two Stroke Talk / Re: Looking at a 2019 KTM 300 XCW TPI
« on: March 23, 2019, 06:46:58 PM »
Planned to the get new Katoom out over the weekend, but... Grand Child #3 came 3 weeks early, so riding was put on hold....  He's little under weight, but he's a fighter.  There was the potential for other issues, but each potential isses has subsided.  He's still in the intensive care unit, but getting stronger everyday.  Hope to bring him home later this week.  Mom and Dad are doing well, but just want to bring the baby home.

eprovenzano, you are a good person, you look after those grand kids.

General Two Stroke Talk / Re: Looking at a 2019 KTM 300 XCW TPI
« on: March 22, 2019, 02:44:32 AM »
TPI, remember you saw it here first!  The YZ250 TPI.

Good on you eprovenzano now you can see what I was trying to explain about the power delivery way back when we were developing TPI here on TSM.

General Two Stroke Talk / Re: New Two stroke piston design.
« on: October 16, 2018, 02:00:55 AM »
The head for my 360 TPI, water is forced to pass the base of the sparkplug before leaving the head.
Also lots of little channels over the top of the squish area, on the water side, to help control detonation. Head is toroidal type like my 350 Kawasaki but being water cooled is two piece.

General Two Stroke Talk / Re: New Two stroke piston design.
« on: October 11, 2018, 12:52:19 PM »
Sorry, I've been quiet,  doesn't mean nothing is happening, just been busy working and refining a few projects.
This TPI thing is getting interesting, just lately KTM have decided to provisionally patent the TPI system. They cant because all my original development has been well documented here on TSM and the videos I released back in 2013.
An other manufacturer is pissed as they are about to release their own B port TPI. There will be a fight.
Thank you Ray for resurrecting this forum and saving all my old injection stuff, who would have thought?
As for my Mk2 TPI (the 360) its become a haven for spiders. But the need is on now to get it running and get some results, I would like to think by the end of the year finally! I'll post some update pictures in the EFI 360 thread soon.

As to this piston design, yes I have seen it. Wasn't so sure but after some thought I like the idea, might even make some myself. I was worried about weight but that now seems unfounded.  I didn't notice, what grade aluminium did he say he used? I guess the good thing is they can be machined from bar stock rather than cast.

a Little updated look at the rotary valve 360  mk2 TPI

And another project I've been side tracked on, my 700 twin gyro engine. Up and running now, 11 hours flying, just circuits as I'm sure at some point the engine will stop so I need somewhere safe to land. This was the first flight, for both me and the engine.

General Two Stroke Talk / Re: Transfer Port Injection
« on: June 21, 2017, 01:34:23 PM »
Yes a large (burly) injector is needed because at some stage injection is taking place under compression. At higher speeds there is just not the time to inject and mix all the fuel with all the air, thats where Diesel comes unstuck. Cant process the injection and burn at high engine speeds, thats why they react so well to over boosting with air (turbo)but there is a time limit and thats why you don't see diesels doing 13000 rpm. Apart from the general size Im just talking burn wise. This is where HCCI has a major benefit, all air and fuel is already mixed so its just a matter of compressing it at the right time for combustion (controlled detonation). Hence my HCCI test engine, sown here already? Another project in itself. Yes sorry, we have talked about this already.

General Two Stroke Talk / Re: Transfer Port Injection
« on: June 19, 2017, 04:37:10 PM »
Is Direct Injection the future?
It seems the DI Rotax sled engines now run injectors at the inlet port that fire once the pipe is 'on'. makes a bit of a mockery of DI. DI also has to start injecting before the exhaust port is closed as the revs increase, once again making a mockery of DI.
This TPI isn't as bad as everyone would have it (know it alls on the internet) with the gas dynamics in a twostroke its the lower end power (rpm) where the short circuiting takes place (hence DI systems not being pure DI up in the revs only low down), its the position and late firing of the B port injectors that save the day for TPI. This is where most fuel is lost to the exhaust on a carburetor engine and lets face it, where we ride our bikes most, off the pipe or at least in transition.
The real answer is to keep the transfer gas speed up at lower RPMs and lower the port timings (including exhaust port) in conjunction with a modified TPI system. Sliding cylinder anyone?Cylinder could do the throttling (power controlling) while the inlet would have no throttle body, just straight in through the reeds, so the crank case would always be under pressure. Always a good, high inertia, gas flow into the cylinder under an amount of control. This system would require my new TPI system to operate.  Results would show a very wide torque curve and excellent fuel economy.


General Two Stroke Talk / Re: Transfer Port Injection
« on: June 15, 2017, 12:14:39 AM »

See the three cylinder developments, starting with the DI Orbital system. Finishing with our own TPI seen on TSM five years ago.

General Two Stroke Talk / Re: Rotary Valve EFI 360.
« on: June 04, 2017, 03:23:36 PM »
The modified pattern

General Two Stroke Talk / Re: Rotary Valve EFI 360.
« on: May 29, 2017, 06:23:51 PM »
Here we are casting some cylinders in the back yard

These were some cylinders we cast a few years ago, this engine is for use in Autogyros (aviation), 700cc twin with internal gear reduction. Electric start and counter balance shaft.

This is the actual 360 crank case being cast and machined, CC601 heat treated to T6.

General Two Stroke Talk / Re: Rotary Valve EFI 360.
« on: May 28, 2017, 01:01:45 PM »
I'll get some pictures up, but have I had a battle with this forum regarding posting pictures. I'll get someone that knows what they are doing to help. (a young person)

General Two Stroke Talk / Rotary Valve EFI 360.
« on: May 26, 2017, 03:01:06 AM »
This is a project I started way back when the original TSM was up and running. I have far too many projects and the 360 got sort of left behind, sleeve engine took up some time then the 700 twin Autogyro engine and many different cylinder casting projects and then the HCCI test engine.

General Two Stroke Talk / Re: Transfer Port Injection
« on: March 17, 2017, 09:14:33 PM »
On the YZ we made a small solenoid operated valve that opened after 60% throttle, before the reed block. Ran a lean pre mix as well.
On my 360 I've got an oil pump (TS100 I think) feeding straight into the big end through the hollow crank shaft. Oil should leave/ fling off the big end and head for the cylinder and small end, mains sealed off.
On the DTPI Kawasaki, I just run pre mix as the injectors are in the crank case aiming at the transfer intakes. Seems enough oil is deposited to keep thing from going dry.

General Two Stroke Talk / Re: Suzuki bringing back the RM125?
« on: March 17, 2017, 01:34:06 PM »
Transfer port inject it and they are away! Come on Japaneses, KTM are doing it! 

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