Oddball engines and prototypes

[husaberg]

Willdun, Im just going to run with this for now, my twostroke future, as it were ��. Finaly found the time and got the bugger off the dyno for a rip around Saturday, angry yet refined is the best way to describe it, vairable rotary disc valve TPI engine, E85 fuel. It goes real well.

For some reason i have a strong urge to feeding candy down the lid of it. I have no idea why.

the cover on the left side looks awesome.

[WilDun]

Willdun, Im just going to run with this for now, my twostroke future, as it were �. Finaly found the time and got the bugger off the dyno for a rip around Saturday, angry yet refined is the best way to describe it, vairable rotary disc valve TPI engine, E85 fuel. It goes real well.

Neil,
Very impressed with your perseverance and it must feel great to have it all working - congratulations!
Not many people are prepared to put in the effort to get that far!
BTW, I see you have abandoned the side tailpipe and gone for the scooter type of setup (just for convenience?).

I wish I had started doing stuff much earlier (too late now!) but unfortunately, when you called in to my place I was already well on the way out ( health and mobility wise) - but the little bit I did do, really was all great fun
I did manage to design and build my own little home foundry and do a few pours - this was all inspired by your efforts! and it also got me interested in bikes again after many years away from them - that also made me feel good!
I was hooked on foundry stuff ever since the fateful day when I got a severe bollicking for walking over what I thought were "sand dunes" which actually were just finished moulds, ready for the CI pour!! - (that was at in the local foundry, when I was a schoolkid nearly 60 years before).

We have just sold our house and will probably be moving to the Tauranga area soon (where the family live).
Also probably where we eventually will end up, - Probably it will have nowhere with even a hint of a workshop! - (which I predicted was going to happen!). - That's life I guess! ....... reduced to activities such as bowls, croquet and snakes and ladders next! (like hell! - got a lot more left in me yet!).

Well done with your new "Yamahintz"! - please keep us advised on it's progress!

[ken seeber]

What is that tapping sound ??
Big ends gone ??

https://newatlas.com/automotive/two-...n-rod-thunder/

Might not need cammed piston skirts though..

[lohring]

I would think that the resulting short rod would put more load on the piston skirt. I always felt that placing the wrist pin high in the piston was the way to go. Also, that looks like a great way to make a heavy piston. Again, we thinned our pistons as much as possible; sometimes to the point of failure.

Lohring Miller

[Frits Overmars]

I always felt that placing the wrist pin high in the piston was the way to go. Also, that looks like a great way to make a heavy piston.

What makes you say that, Lohring? The bulk of the piston mass is situated between the crown and the piston pin bores, so putting the pin as high as possible is the best way of weight saving that I can think of..

[lohring]

Sorry, my answer wasn't clear. I always advocated for a high wrist pin placement. The pictured system for lowering the wrist pin not only should cause more side loads but also adds reciprocating weight to the piston. The performance should be poorer with the two piece rod system.

Lohring Miller

[husaberg]

Posted for Greg, as a former Manx owner i thought he might appreciate this.

Even makes decent sounds

[Frits Overmars]

Even makes decent sounds

Still sounds like a foul-stroke to me. Must be my hearing aids cheating on me

[Grumph]

Not a fan thanks Husa. That much effort building it and it still uses those wheels.

[husaberg]

Still sounds like a foul-stroke to me. Must be my hearing aids cheating on me

As far as fourstrokes go i can appreciate a high reving V twin or small multi

Not a fan thanks Husa. That much effort building it and it still uses those wheels.

i like the premise, the tank si so well done but yes the wheels d let it down especially as they do a kit to convert comstars to spoked wheels. but ti was mainly to wind up purists i guess.

https://www.gazzz-garage.com/2019/06...iew-backstage/

[Frits Overmars]

As far as fourstrokes go i can appreciate a high reving V twin or small multi

So can I Husa. https://www.youtube.com/watch?v=hjZWrvUGAV8

[katinas]

Just two years ago, we discussed the use of two-stroke engines in WW2. And now, it's hard to imagine how two-stroke engines could be used in a worse way than they are now over a Ukrainian city.
Post Soviet terrorist , with Putin in command, use Iranian Shahed 131 drones with Wankel engines and Shahed 136 with 4-cylinder two-stroke MD 550 types engines, copies of Limbach. Ukrainians immediately called them mopeds. Russians renamed them to Geran.

Add video of Shahed 131 drone attack over Kiev. From 20 seconds can be heard clearly the sound of Wankel rotary engine. In peacetime, this sound was heard in a different way, but in the context of the war in Ukraine, it sounds terrible. https://www.youtube.com/watch?v=YcRSlBCr-bo

What the Ukrainians have done is a real miracle. Standing up to such a post-Soviet monster in the first months of the war without greater support, just a miracle . Since the beginning of the war, it was difficult to do anything, I put all my project aside. Thanks of great support to Ukraine now, from many countries.

[WilDun]

Just two years ago, we discussed the use of two-stroke engines in WW2. And now, it's hard to imagine how two-stroke engines could be used in a worse way than they are now over a Ukrainian city.
Post Soviet terrorist , with Putin in command,............................Thanks of great support to Ukraine now, from many countries.

To relegate the two stroke engine to a sacrificial end (exactly the same way as he is treating his own people!) is totally inexcusable (and inexplicable!) - all because of a dream of greatness ! - This for him will end in either death or misery living in a bunker till that will most certainly happen in a few years time!) - what is he thinking?

[katinas]

To relegate the two stroke engine to a sacrificial end (exactly the same way as he is treating his own people!) is totally inexcusable (and inexplicable!) - all because of a dream of greatness ! - This for him will end in either death or misery living in a bunker till that will most certainly happen in a few years time!) - what is he thinking?

Hi, WilDun
The best actions illustration of the Putin's terrorist army in Ukraine, could be just this one photo. This mine was found in a piano by a Ukrainian family, when they returned to their home, after liberating one of the cities from the terrorists of Putin's army a few months after the start of the war, last year.
Other photos, just part of "collection" that was landed on Ukrainian cities.
In the last photo, is bombed location near Kiev, where was damaged main Ukrainian's "Chaika" ( Gulls ) racetrack.

[pete376403]

Not just the bad guys* - https://www.liquidpiston.com


*depending of course who you support but AFAIK these are not being used to target civilians