Forced induction 100cc

[Sketchy_Racer]

So,

As mentioned earlier the supercharger was working at low RPM making boost pressure at idle. However when the RPM rose, the boost and flow dropped off significantly.

I removed the traction fluid and tried some other oils. I had a Elastohydrodynamic oil from Omega oils to test and also re tried the nissan CVT and honda CVT oil. As soon as the other oils went into the charger, it completely lost all flow and pressure, showing how important the traction fluid is!

So I pulled to down to inspect the charger for signs of slip, and I found them. It has marked the outer ring considerably. This means that under the RPM rise the contact pressure is no longer enough to keep the traction fluid working. I have 3 more outer rings to try all with slightly different interference's to see which is best, but I do believe that i'll finally get it working soon!

I gave myself a chronic headache in the shed from exhaust fumes so have to have a nana nap for a hour or so

[Sketchy_Racer]

Hi there
Who did your casting ?

and ps , can someone give a short update of whats happening !!! the bike now has a turbo?

Stephen

Hey Stephen,

The bike now has a centrifugal supercharger, a belt driven turbo if you want to call it that.

The roots blower is currently getting some new parts to make it work better but I'm hoping I can get the centrifugal blower working as it will be more efficient.

[Flettner]

So there will be a pump up for sale soon?
I'll give you an address to send it to.

[Grumph]

Couple of things arising...

Don't use a toothed belt - we've discussed this before. Use a polyvee about 20mm wide with plenty of wrap around the pulleys. Cheaper and more reliable too.

Stephen as a Royal Oilfield owner and believer will tell you all about the floating bush plain bearing - may even be able to tell you how much oil it needs. Mr Turbo and ohers blew roller bearing motors successfully with low pressure and not a lot of oil volume coming through....

It appears to me as though all the traction drive is good for is headaches of one kind or another.....

[Sketchy_Racer]

Couple of things arising...

Don't use a toothed belt - we've discussed this before. Use a polyvee about 20mm wide with plenty of wrap around the pulleys. Cheaper and more reliable too.

Stephen as a Royal Oilfield owner and believer will tell you all about the floating bush plain bearing - may even be able to tell you how much oil it needs. Mr Turbo and ohers blew roller bearing motors successfully with low pressure and not a lot of oil volume coming through....

It appears to me as though all the traction drive is good for is headaches of one kind or another.....

Yeah, I can accept the criticism towards the traction drive, but it's cool and intrigues me which is why I will continue for now with it.

I assembled the blower for it's last attempt tonight, but the bloody engine wont run, seems to have shit a pickup coil or the ECU, not sure but it is not sparking and the pickup sensor is not triggering the ECU.

For the last outer ring I got some assistance from one of the mechanical engineers at work to give me a hand with the calcs and worked out how much interference I needed for the correct loading. This worked out to be 0.12mm interference over a 62mm ring to achieve the 92.5kgf^mm2

So I made the ring and then also took the advice from Dave Griffifs to achieve and accurate round surface with an excellent surface finish which was to make a cast iron lap and used diamond paste to lap the surface. It worked out well and I got a very straight and flat surface.

To assemble it I used a 300 degree temperature difference and it slotted together easily. Once cooled it still rotated smoothly which is key!

So once i get the damn engine to run I think it'll be good to go.

[Brian d marge]

Couple of things arising...

Don't use a toothed belt - we've discussed this before. Use a polyvee about 20mm wide with plenty of wrap around the pulleys. Cheaper and more reliable too.

Stephen as a Royal Oilfield owner and believer will tell you all about the floating bush plain bearing - may even be able to tell you how much oil it needs. Mr Turbo and ohers blew roller bearing motors successfully with low pressure and not a lot of oil volume coming through....

It appears to me as though all the traction drive is good for is headaches of one kind or another.....

Can do if needed , have some old calcs somewhere on the enfield floatind bush ....I still use it in me race bike

Stephen

[F5 Dave]

heck there's 2 weeks till the next meeting, heaps of time. Start work on the cosmetics for a break & get into it the night before,

[koba]

I still use it in me race bike

I'd like to know more about this, have you posted details before? Where?

If not you should crack some storytelling out.

[Brian d marge]

I'd like to know more about this, have you posted details before? Where?

If not you should crack some storytelling out.

I have an enfield fetish as you know , the bullet runs a floating bush, it has better load carrying characteristics in some areas for the size etc

I was involved in the bonnieville attempt may moons back to try and get an Enfield to win its class ( won the AMA plate but not the salt flats ), as part of that we needed to know the engines boundries

So I did. from fins to oil etc ( MEGA respect to those old engineers , bang on the money were they)

I have some docs that may help if anyone cares, the calcs for the bearings are not so hard , ( use the Sommerfield number , old but,,,,,)

Stephen


ps I aint in this photo......( I am young and slim and far too good looking)

[husaberg]

I have an enfield fetish as you know , the bullet runs a floating bush, it has better load carrying characteristics in some areas for the size etc

I was involved in the bonnieville attempt may moons back to try and get an Enfield to win its class ( won the AMA plate but not the salt flats ), as part of that we needed to know the engines boundries

So I did. from fins to oil etc ( MEGA respect to those old engineers , bang on the money were they)

I have some docs that may help if anyone cares, the calcs for the bearings are not so hard , ( use the Sommerfield number , old but,,,,,)

Stephen


ps I aint in this photo......( I am young and slim and far too good looking)

I read somewhere that the floating bush came about because they couldn't get flat alloy cadges for the bearing? (Classic Bike i think with an exert of a interview the designer) something about the riveted cadges not being up to the increased forces on overrun.
i have posted those yummy light MMC rods that run direct on the Crankpin somewhere.

ps bowling shirts LOL

[Flettner]

The final solution.

[Flettner]

Husaberg, have you got your stuff yet?

[Flettner]

A picture of the 440 Uniflow, boat testing. The chambers have their bleed off from the mid section. These do look like missiles and in fact as we pulled up to the the boat ramp to run the boat we were set upon by three police men, wanting to know what we intended to do with these rockets. It took quite a while to explain that they were connected and would not fire off!! If I had known they were going to be at the boat ramp I would have painted them yellow with red tips, just to make it more interesting.
These days you would probably be locked up !!

[Flettner]

The 100 uniflow engine. Early development.

[husaberg]

Husaberg, have you got your stuff yet?

Its in Auckland awaiting customs documentation will have it sorted today and i guess i will then expect another gouge from NZ tax department before delivery new to the importing stuff.
I will probably hit you up tonight for some info if your available.