Spinner and backing Plate

[Robert Lees]

Re: Spinner and backing Plate

That would be much appreciated, Gary, thanks!

[astjp2]

Re: Spinner and backing Plate

Earcoupe spinner fits the continental/o-235 lyc ..pacer would be a Lycoming o-290/320 from what I remember...I would have to research the flanges to be 100% sure

[d.grimm]

Re: Spinner and backing Plate

I know it doesn't fit my C-85.
Dave

[Bonanza91K]

Re: Spinner and backing Plate

Since I use two different props, the hub thickness is different on each one. The Piper spinner has a bulkhead so it might fit one prop but not the other. The stock spinner had only a backplate so I used it with both props for years with no problem, until now. It was probably the same one used on the F19 but finding another one is a problem. The backplate cracked, separated and tore up the spinner. Both are trash. May have to go with a skull cap and be done with it.

Jim

[3Dreaming]

Re: Spinner and backing Plate

Since I use two different props, the hub thickness is different on each one. The Piper spinner has a bulkhead so it might fit one prop but not the other. The stock spinner had only a backplate so I used it with both props for years with no problem, until now. It was probably the same one used on the F19 but finding another one is a problem. The backplate cracked, separated and tore up the spinner. Both are trash. May have to go with a skull cap and be done with it.

Jim

Is there any kind of support for the spinner in front of the prop?

[Bonanza91K]

Re: Spinner and backing Plate

There is no support (bulkhead) on the front of the prop. Just the backplate.

Jim

[PA1195]

Re: Spinner and backing Plate

I wonder if you could put something like a tennis or rubber ball or foam block between the prop hub and spinner to dampen any oscillation? It might be that without forward support the spinner can stress the rear plate if off balance.

Gary

[3Dreaming]

Re: Spinner and backing Plate

I think not having a front bulkhead is the root of your spinner problems. If the spinner gets bumped off center it is going to be out off balance, and it will break. The problem with two props is the thickness of the hub and the placement of the front bulkhead matching the holes in the spinner. You need to find a way to make a spinner with a front bulkhead work, and it might require a different spinner for each prop.

[PA1195]

Re: Spinner and backing Plate

How often during routine maintenance does the prop or spinner get checked for track? I've never seen it done unless requested for some related squawk. Ask a pilot what's involved and await the stare.

Yes a forward bulkhead would better support the spinner and probably should be there. But without a further tracking inspection it might still be unbalanced.

Edit: The way I've seen it done is to idle the engine with the plane tied down. Use a long stick with a contrasting soft marker attached (chalk/colored felt tip pen) to very briefly touch the prop or the spinner. The resulting single blade or spinner side marks indicate any offset at that location. Adjust and retest.

Gary

[Bonanza91K]

Re: Spinner and backing Plate

It looks I'll be using two different spinners. The problem is two different hub thicknesses. The 76AK for the floats can use a Piper spinner from a Colt but the stock 72CK needs another spinner from a Piper Tomahawk or a Grumman AA1. I don't know what they look like but I'm looking for a source.

Jim

[PA1195]

Re: Spinner and backing Plate

Ignorant here so will ask if you can get by with a skull cap? Is the factory spinner a required item...like for passing cooling tests, or is it just a cosmetic bonus?

Gary

[Hank Jarrett]

Re: Spinner and backing Plate

Saw one plane with a fancy front plate and no spinner. Had the Continental emblem on it. Looked GREAT, and no. I doubt at the speeds we fly the spinner has any cooling impacts at all (or measurable speed impact).

Hank

[MAC]

Re: Spinner and backing Plate

The F-19 I have came with the skull cap spinner and has since been taken off. To me simpler, lighter and anything less that might break or go wrong is the way to go.

[PA1195]

Re: Spinner and backing Plate

For the F21 listed in TCDS 1A9 Rev 22:

III - Model F21, 2 PCLM (Normal or Utility Category), Approved July 2, 1980...

Required Equipment In addition to the pertinent required basic equipment specified in CAR 3, the following
items of equipment must be installed:...

6. (a) Propeller (with Lycoming O-235-L2C engine) - Sensenich 72CK-0-50, fixed pitch
metal...(b) Spinner - Taylorcraft P/N 2800-3 backing plate and 2800-4 spinner.

Now what if those P/N's listed in (b) are no longer available?

Gary

[Bonanza91K]

Re: Spinner and backing Plate

Thanks for all of the help but the problem is that the spinners and backplate aren't available and the nose bowl has a large open area behind the prop that needs to be covered by a backplate. Can't get by with a skull cap. I'm off to the far north in two weeks so I'll have to fly with the backplate in place and no spinner.

Jim