Hartzell Composite

[stancaruthers]

So Jerry & Neil are both correct, I just received the Paul Harvey story version from Hartzell just now, very helpful folks....

The composite comes with the "G" style hub and is 1" extended for blade clearance at high pitch which will create an ugly gap between spinner and cowl face, they are telling me to space the spinner back plate the same 1" to move spinner back to where I'm happy.

Does anyone see an issue here??

[6 Gun]

Don't see how the spinner could come back as it is cut out close to blades?
You may have to cut some foam and glass in front of cowl behind spinner an inch.Im doing that now as my hub is an inch longer than my last or you could add an inch to the back edge no fun either way.
Bob

[RV8iator]

When we got our first ASC props we had several issues with the blade/cowling clearance at full course pitch. Initially, we limited the degree change of the blades, but that produced overspeeding of the engine at higher TAS. I believe initially they were at 35 degrees and then were changed to 28 degrees of pitch.

Hartzell changed us from B hubs to G hubs, which moved the blades about 1 inch further away from the engine. Using their spinner it was just a bolt on swap. The 'gap' was adjusted with washers between the hub and the backing plate. Very little change and was easily measured before installing the prop.

What a great prop and a great company supporting it.

[BillL]

Originally Posted by RV8iator

When we got our first ASC props we had several issues with the blade/cowling clearance at full course pitch. Initially, we limited the degree change of the blades, but that produced overspeeding of the engine at higher TAS. I believe initially they were at 35 degrees and then were changed to 28 degrees of pitch.

Hartzell changed us from B hubs to G hubs, which moved the blades about 1 inch further away from the engine. Using their spinner it was just a bolt on swap. The 'gap' was adjusted with washers between the hub and the backing plate. Very little change and was easily measured before installing the prop.

What a great prop and a great company supporting it.

Did they attach any "G" limits to the G hub? Or is it the same as the B?

[Kahuna]

Originally Posted by BillL

Did they attach any "G" limits to the G hub? Or is it the same as the B?

No change.

[KatanaPilot]

I am considering the Hartzell composite prop for our RV-7A project well underway. I'm familiar with the prop as we had it on our DA-40 XLS. I'm just trying to justify the cost. I know it's a superior prop in many ways.

The project has a Titan O-360 (soon to be IO) and I have a cold air sump to install which will also require horizontal induction. My understanding is the standard Van's cowl will not work, but the extended Sam James should.

Does anyone know what will be required (like a prop spacer) and/or the SJ cowl for this setup?

Thanks in advance.

[jthocker]

Originally Posted by KatanaPilot

I am considering the Hartzell composite prop for our RV-7A project well underway. I'm familiar with the prop as we had it on our DA-40 XLS. I'm just trying to justify the cost. I know it's a superior prop in many ways.

The project has a Titan O-360 (soon to be IO) and I have a cold air sump to install which will also require horizontal induction. My understanding is the standard Van's cowl will not work, but the extended Sam James should.

Does anyone know what will be required (like a prop spacer) and/or the SJ cowl for this setup?

Thanks in advance.

Did you read this thread??????????

The standard Vans cowl WILL work!!!!!!!!!!!

It will work just fine! No spacer!

[KatanaPilot]

Understood.

Will the standard Vans cowl work with the Hartzell prop AND a cold air sump with horizontal induction?

[jthocker]

Originally Posted by KatanaPilot

Understood.

Will the standard Vans cowl work with the Hartzell prop AND a cold air sump with horizontal induction?

Yes,
The sump does not affect the cowl.

[KatanaPilot]

Appreciate the fast response.