flyrotary@lancaironline.net Mailing List Archive

Rob,

If you have the ground adjustable IVO then Kelly's suggestion will probably work.

However if you have the in-flight adjustable IVO (or are considering a switch to the in-flight adjustable in the future) you will want to mount the spinner backing plate between the adaptor plate and the rear prop crush plate.

If you have the in-flight adjustable the slip rings must be outside the backing plate so that the brushes can make contact.

Also, I did not see it mentioned in any of the other posts but the spinner size is usually dictated by the cowl more than the prop.

You want a nice transition between the cowl and spinner.

If you are making your own cowl then you can use any spinner and fit the cowl to it.

But if you are using a factory cowl then it pretty much dictates the spinner diameter.

Aircraft Spruce carries a nice selection of props that should cover your needs.
Of coarse this is all only my opinion and others may have other thoughts on the subject.

Jim

(Dyke Delta 13b / IVO Magnum in flight adj.)

Rob <rob@mum.edu> wrote:

Thanks for your input Kelly.

My IVO adapter plate does not bolt to the prop hub. It is sandwiched between the IVO outer plate (crush plate), and the prop hub by 1/2 inch bolts. Then the 1/2 inch bolts are screwed into threated holes in the prop hub. My adaptor plate was made for my redrive that I use on my Ford V6 engine. Anyway I would like to use my IVO prop with Tracy's redrive prop flange so some adapting is necessary. What is the best way to do the adaptation? Any suggestions. Does Tracy have an option for 1/2 inch bolts?

Robert

Robert Bollinger
FM1099 MUM
Fairfield, IA 52557
rob@mum.edu
Home (641)472-7000ex2068
Cell     (641)919-3213

----- Original Message -----

From: Kelly Troyer

To: Rotary motors in aircraft

Sent: Wednesday, August 29, 2007 4:33 PM

Subject: [FlyRotary] Re: spinner choice rd1b & iv

Rob,

   If your "IVO" is like mine then it has an aluminum adapter plate that bolts to

the SAE 2 redrive hub with either 3/8" or 7/16" (allen head internal wrenching)

bolts then the "IVO" blades are sandwiched between that adapter and the outer

"IVO" plate (with the pitch adjustment screw) with 1/2" bolts that are indexed

between the 3/8" or 7/16"allen bolts........ You will probably want to locate

the spinner backing plate between the redrive hub and the adapter plate to

have proper blade clearance........That would call for the backing plate to be

drilled to the standard SAE 2 bolt spacing and for whatever bolt and drive lug

size your redrive has....... I also have "IVO", both ground adjust and the electric

inflight conversion..........IMHO

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- Original message from "Rob" <rob@mum.edu>: --------------

Tracy,

Speaking of drive lugs I got your PSRU for my 20B with 5/8 drive lugs for 3/8 inch bolts from Bruce Turrentine but all my props (IVO magnum) are for 1/2 inch bolts. Can I send you the prop hub to change to 7/16 drive lugs or what would you suggest.

Robert

Robert Bollinger
FM1099 MUM
Fairfield, IA 52557
rob@mum.edu
Home (641)472-7000ex2068
Cell     (641)919-3213

----- Original Message -----

From: Tracy Crook

To: Rotary motors in aircraft

Sent: Tuesday, August 28, 2007 9:03 AM

Subject: [FlyRotary] Re: spinner choice rd1b & iv

True Buly, except I don't know why prop hub thickness would be a factor or do you mean prop thickness at the hub?

The rest of it is: 5/8" drive lugs, 3/8" prop bolts (unless 7/16" ordered as an option) SAE 2 hub spec covers everything else.

Tracy Crook

On 8/28/07, atlasyts@bellsouth.net <atlasyts@bellsouth.net> wrote:
Hi Tracy,
He'll need the the lug diameter and hole circle pattern, bolt size and prop hub thickness. I had to do the same and they came with all these questions, that I assumed is common knowledge?
Looks like the sales person has a form with all the questions he has to fill?
Buly
>
> From: "Tracy Crook" <tracy@rotaryaviation.com>
> Date: 2007/08/28 Tue AM 08:05:33 EST
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: spinner choice rd1b & iv
>
> Spinner choice is a function of the airplane and prop hub (for backing plate
> hole pattern).  It has nothing to do with the reduction drive per se.   The
> hub on all RD1x drives is an SAE 2 , sa me as all Lycoming engines.
>
>  Van's Aircraft would be happy to sell you a spinner with all the necessary
> backing plates.
>
> Tracy
>
> On 8/28/07, Scott <squiggles@yahoo.com> wrote:
> >
> > Hello...
> >
> > I need a spinner for my 105mph airplane which has a ground adjustable ivo
> > with tracys rd1b.  i've tried to contact uhs spinners but they have not
> > returned email or phone messages.
> >
> > For other tractor airplanes using tracys reduction drives, what spinner
> > did you choose?  Did you need aback plate as well?
> >
> > Any thoughts are appreciated.
> >
> > Thank you.
> > -Scott
> >
> >
> >
> >
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