Run in stand/dyno build.

[dwilfong]

What about the eng cradle with a load cell mounted on it?

 

[dwilfong]

What made you decide to go this rout Terry?
The soft wear program was best suited to work with?
Looking for true HP#?

 

[Terry Keeley]

What made you decide to go this rout Terry?
The soft wear program was best suited to work with?
Looking for true HP#?

You mean inertia dyno vs something else?

 

[dwilfong]

You mean inertia dyno vs something else?

Yes

 

[Terry Keeley]

Here's a good (practical) article I found early on, kinda sold me on the inertia dyno idea:

http://performancetrends.com/tdkmotorsports/index.html
When Marty and Brian Calahan built their unit twenty years ago they were pioneers, nowadays with the internet and Performance Trends data acquisition units and software it's much easier to build a working unit.

Well, sorta. I'm lucky I have my toolmaker buddy Rudy to help with the fab, it wudda been tough without him. IIRC Marty and Brian had Norris Sparks to lean on. It looks simple but aligning a motor and shaft to tenths in all three axis' ain't so easy...

 

[Terry Keeley]

I made some 10-32 thermocouple fittings today, thanks to Mike for the idea and my Consigliere for the technique to make the tapered nuts.

 

[Steve White]

You get an A+ for machine work Terry.

 

[Mark Anderson]

Let's hear the technique.

 

[Michael Mooers]

I made thermocouple fittings today, thanks to Mike for the idea and my Consigliere for the technique to make the tapered nuts.

Well, those are about 100x better than my backyard engineering setup. I may have to buy some from you!

 

[Terry Keeley]

Let's hear the technique.

For the tapered nut?

Top secret. Patented, encrypted method developed by my Consigliere, Rudy.

Oh wait, he said it's OK to share, lol.

Run a full tapered tap (ie: not a plug or bottoming tap) part way into the nut, with a little playing around you can figure out how far to go so it starts and gets tighter as it goes on.

A+ for machine work? I'm lucky I get a lot of good help...

 

[Wasted wages]

For the tapered nut?

Top secret. Patented, encrypted method developed by my Consigliere, Rudy.

Oh wait, he said it's OK to share, lol.

Run a full tapered tap (ie: not a plug or bottoming tap) part way into the nut, with a little playing around you can figure out how far to go so it starts and gets tighter as it goes on.

A+ for machine work? I'm lucky I get a lot of good help...

So, in other words.... the SWAG method..!

 

[DaveMarles]

Terry, Take care with your automatic needle setting vs EGT. As soon as an engine starts detonating the EGT drops and your system may well lean it out more, and then BOOM.

 

[Terry Keeley]

Terry, Take care with your automatic needle setting vs EGT. As soon as an engine starts detonating the EGT drops and your system may well lean it out more, and then BOOM.

Yup, thanks. Charles mentioned this too, I didn't know (or I forgot) about this.

When I drove piston airplanes a long time ago we set the mixture with EGT, I can't remember if this happened on the Lycoming's and Continental's as well?

Imagine a system where your mixture was always perfect, all the way around the course or during a SAW run. No more sagging off in the corners, no more going lean at the end of the tank, no more cooking a motor if you got a speck of dirt in the needle or cut a cooling line.

You'd need some sort of throttle position input and logic so it would go to the peak then richen up a bit.

Hmmm....

 

[Terry Keeley]

The Mule's hitched to the cart!

 

[Ray Sametz]

Is it gonna be a Clint Eastwood or a Sister Sara.

 

[Terry Keeley]

Not much to look at.

Hard to start, clutch taking forever to lock up then slowwwww acceleration and pop. Wheel's way too big, wish someone coulda told me that.

Thought I broke the motor but it's fine, musta backfired or something and spit the collet.

Wheel got to 13K and was super smooth, eddy brake works good. EGT and CHT thermocouples all good.

Need a better camera angle...

 

[Wasted wages]

Gotta ask...why such a heavy flywheel ?
I really don't think our little engines can spool up that amount of weight very quickly, can
they ? Seems like it would cause undue stress on the motor and drive line

Hmmmmmmm.......

 

[Ricky Neal]

Not much to look.

Hard to start, clutch taking forever to lock up then slowwwww acceleration and pop. Wheel's way too big, wish someone coulda told me that.

Thought I broke the motor but it's fine, musta backfired or something and spit the collet.

Wheel got to 13K and was super smooth, eddy brake works good. EGT and CHT thermocouples all good.

Need a better camera angle...

It looks great Terry and at least it's relatively easy to remove material from the wheel. I cant wait to see some runs once it fully dialed in.

 

[Ray Sametz]

Terry, I know it's a PITA, but wear a face shield or something. Your daily glasses don't cut it. Stay safe.

 

[Terry Keeley]

Thanks, yur prolly right. Those are safety glasses at least.

Was thinking it'd be easier just to move the brake into position manually but decided it best to hang back near the door.