ESE's works engine tuner

[breezy]

Anybody see this before?

https://technologyelevatedco.com/ree...irst-thoughts/

im no expert, but it looks flow restrictive

[jfn2]

Yes, if you look at the second pic..
https://technologyelevatedco.com/wp-..._Intake_21.jpg
you will see what is known as a fluid diode, one on top and one on the bottom. This is how this inlet is made to work. Eran Sher and John Heywood, in their book.. The Two Stroke Cycle Engine SAE R-267 and SAE paper #830092 explain how these would work in the transfer ports to prevent backflow into the crankcase. I would be interested to hear how this works and just how hard starting the engine would be. I would also like to see it on a flow bench.

[Grumph]

I don´t know what 'gussets' are. i googled it and it said 'wedges'.
In my roller i have a steelsupport inside at the middle that are welded to the roller and then a bushing is pressed between it and the axle.

This support is 60mm thick and drilled through from side to side to let the concrete 'grip' the roller and also when i was casting, let it expand through it.

Relax - you've done exactly what he would have if he used concrete as a filler.

English can be annoying...Gussets are actually wedges cut out of material in dressmaking ( I've never seen Wallace in a dress...) But in an engineering context they are reinforcing pieces usually added in corners - hence wedge shaped.
Strictly speaking what you've done is added a bulkhead inside your tube.

[F5 Dave]

No no, they come with sour cream, a spicy coating and if you're lucky cheese and bacon.

[marsheng]

An example of a gusset is the triangular piece used to strengthen the joint between to tubes on a motorcycle frame.
http://www.vintagemongoose.com/frame/gussets.php

We have do a lot of talking about tubes and concrete, but although that is an issue and it seems that the homework has been done, I'm more worried about the other issues, bearing capacity, the possibility of over heading at high speed and collapsing and the floor frame mount. The inertia in the drum is huge.

I'm sure that everyone has see this the bridge break in the 1940's. All the calculations were correct, bridge was good, but they forgot to take the wind into account.

https://www.youtube.com/watch?v=M5QNV3So7GM

See my signature.

PS The Chinese are building a bridge between Hong Kong to Macau that is 35 km long and over the sea !!!

Cheers Wallace

[SwePatrick]

An example of a gusset is the triangular piece used to strengthen the joint between to tubes on a motorcycle frame.
http://www.vintagemongoose.com/frame/gussets.php

We have do a lot of talking about tubes and concrete, but although that is an issue and it seems that the homework has been done, I'm more worried about the other issues, bearing capacity, the possibility of over heading at high speed and collapsing and the floor frame mount. The inertia in the drum is huge.

I'm sure that everyone has see this the bridge break in the 1940's. All the calculations were correct, bridge was good, but they forgot to take the wind into account.

https://www.youtube.com/watch?v=M5QNV3So7GM

See my signature.

PS The Chinese are building a bridge between Hong Kong to Macau that is 35 km long and over the sea !!!

Cheers Wallace

The bearings i use has:
Dynamic Load Capacity: 11800 lb.(5352kg)
Static Load Capacity: 8100 lb.(3674kg)
If having imbalance the load will increase more than static weight of roller.
These bearing are used often in much bigger systems than mine, also with longer rollers.
The main frame holding the roller has 50x50x5 beams, and 10mm plates under the bearingcarriers to spread out the load over a bigger area.
Then the upper frame witch i´ll use to cover the roller has smaller measurements as it is just for the sheetmetal and triangulating the main frame.
I´ve been looking at a lot of dynos and copied some ideas.

At the ends of roller inside of bearing there will be a securityadding 'hoop' to catch roller if something goes wrong.
These 'hoops' will almost touch the axles to not allow the roller to build up speed in any direction if a bearing brakes.
There will also be 'hoops' around the roller underneeth the sheetmetal.
The sheetmetal itself will also add security as i will use high grade steel and about 3mm thick.

Rgds.

Edit:
Take a look at this site: http://www.dynomet.dk/en_diydynoparts.htm
He builds less rigid frame then mine, i feel secure

[husaberg]

Anybody see this before?

https://technologyelevatedco.com/ree...irst-thoughts/

Interesting!

im no expert, but it looks flow restrictive

It's a Telsa Valve

[tjbw]

im no expert, but it looks flow restrictive

I think it could outflow a reed valve ....

during the expansion stroke

Frits posted his design for a turned Tesla valve here:

http://www.kiwibiker.co.nz/forums/sh...totypes/page64

[SwePatrick]

Try to kickstart a big cc twostroke fast enough to get that valve to work,, good luck

[shnaggs]

Yup, the Tesla valve was the first thing I thought of when I stumbled on this. I always had the thought to try and see if it would be feasible in a 2 stroke, but I kept drawing them and they always looked flow restrictive on paper. I guess time will tell if this thing actually works.

[oldjohnno]

Maybe I'm cynical but to me that Tesla valve just looks like something that would stifle flow in one direction by creating significant turbulence. And in the other direction it would create a whole lot more.

[ken seeber]

I agree with all of the above AND the fact that it has been around for at least a cuppla years. If it was a winner, then everyone would know and be clamouring to get one.

Still, would like to be proven wrong, as there is some elegance to it and there are other areas within an engine where the principle could be applied.

[EssexNick]

Might be useful in transfer passages, if they could be made to flow enough, given the space available.

[TZ350]

.
Back to working on the EFI project.



I kept having problems with the original 12Volt water pump and eventually it burnt out. So I found this little beauty lying around the workshop and plumbed it in for a temporary fix. The unkind suggested I put a skate board under it and ride the outfit in the side car class. The up side with the 12V pump being temperamental was that I found the engine boils up nicely without any damage, did it quite a few times.



28rwhp @ 12k rpm, not bad for a un ported MC21 Honda NSR cylinder on a Suzuki GP100 bottom end with a de stroked crank (48mm stroke for 110cc), and a Kawasaki KE175 rotary valve which opens 135 deg BTDC and closes 65 deg ATDC, mild as.

A reliable water cooled all day, never fade 28hp should be fun.

[adegnes]

.
Back to working on the EFI project.



I kept having problems with the original 12Volt water pump and eventually it burnt out. So I found this little beauty lying around the workshop and plumbed it in for a temporary fix. The unkind suggested I put a skate board under it and ride the outfit in the side car class. The up side with the 12V pump being temperamental was that I found the engine boils up nicely without any damage, did it quite a few times.



28rwhp @ 12k rpm, not bad for a standard un ported MC21 Honda NSR cylinder on a Suzuki GP100 bottom end with a de stroked crank (48mm stroke for 110cc), and a Kawasaki KE175 rotary valve which opens 135 deg BTDC and closes 65 deg ATDC, mild as.

A reliable water cooled all day, never fade 28hp should be fun.

I once did the same thing with a large aquarium pump.