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Date: Sun, 12 Sep 2004 11:13:31 -0500
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] PROP SPINNER ADVISE NEEDED
References: <list-407400@logan.com>
In-Reply-To: <list-407400@logan.com>
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Kelly Troyer wrote:

> Guys I am about to cut metal to fit a  16 inch spinner to my three blade
>
> "IVO" propeller and would like any advise on  your favorite methods
>
> of making a pattern of the prop to avoid ruining a very expensive piece
>
> of aluminum. Attached is CDP (cheap digital photo) of what I am
>
> dealing with. All comments and advice appreciated.
>
>  
>
> Thanks,
> --
> Kelly Troyer
> Dyke Delta/13B/RD1C/EC2
>
Hi Kelly,

Having flown behind a couple of IVO's, my 1st piece of advice (if your 
plane is capable of flight faster than about 160kts) is to start with 
another prop. :-)

My 2nd piece of advice is: don't use a spinner, since you will need to 
check the integrity of the hub before every flight. When I tried the 
IVO, the company actively discouraged the use of spinners for that 
reason. (return to  #1)

As to actually fitting the spinner, I fitted the prop & both front & 
rear bulkheads to the hub & used stiff paper (old file folders), cut 
into strips, & tape to get a rough contour around the blades, then 
transferred the pattern to the spinner. There was still a lot of 'cut & 
fit' involved.

Charlie