The adjusting valves would disappear.

So how can you control intake/outtake strokes? You would need to modify
the position of the opposing pistons to each other, maybe. That´s why I
thought of the tensioner. Like on Audi twin camshaft heads, which use an
oilpressure controlled tensioner (adjusting intake to outlet camshaft).

David, I mean the ugly gear connecting both cranks...
The flywheel is only on the lower crank.

However, since it´s a two stroke without camshafts, running it backwards
just needs a reversed starter motor.
Perfect for front-engine setups in rear-engine cars! The solution to all
our problems!

Raimund

Am 07.03.2018 um 22:10 schrieb Jim. Felder:
> I was thinking same as Raymond, that the moving parts in an OHV engine are
> a lot of both the energy and manufacturing inefficiency of a traditional
> engine. I don't think a belt or anything else would work though, and what's
> an extra gear or two? Transmissions are full of them, no problem really.
> The configuration shown in the video is probably not going to be the end of
> the story if this design gets beyond the test bed stage and the best
> mechanical and manufacturing minds start pondering it. The only concession
> to precision control mentioned in the video seems to be the boost, so I am
> not sure variable piston relationships would be needed if that is so.
>
> Emissions? Don't know but it seems like 45% efficiency would be a great
> place to start from.
>
> Jim
>
> On Wed, Mar 7, 2018 at 2:18 PM Alistair Bell <albell@shaw.ca> wrote:
>
>> Bah humbug
>>
>> Just an updated and trimmed down version of Napier Deltic.
>>
>> :-)
>>
>> Alistair
>>
>>
>>> On Mar 7, 2018, at 8:48 AM, Jim. Felder <jim.felder@GMAIL.COM> wrote:
>>>
>>> Everything is wrong with this new engine--opposed piston, combustion
>>> ignition, two-cycle. But check out the video and tell me--if it became
>>> popular—that you wouldn't want one in your Vanagon.
>>>
>>> <
>>>
>> https://www.cnet.com/roadshow/videos/radical-new-engine-makes-a-run-at-reality/?ftag=ACQ-00-10aaa5b&vndid=00e8ca988f7d01a748f9a28d57d69900d7
>>> Jim
>>