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Prop Spacer - Has anyone ever seen anything like this ???

 
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JetPilot



Joined: 10 Jan 2006
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PostPosted: Sat Dec 23, 2006 8:40 pm    Post subject: Prop Spacer - Has anyone ever seen anything like this ??? Reply with quote

Here is a picture of the prop spacer that goes from my Rotax 912-S to the Kiev Hot Prop. It is made out of aluminum and the shaft is tapered to only two inches at its narrow point.

All the spacers I have ever seen have the prop bolts go all the way through from the prop hub to the steel engine output flange. With this spacer the entire load is transmitted to the prop through 2 inches of aluminum. After reading stories of high streingth bolts breaking on occasion, I am wonding how just 2 inches of aluminum could be safe to transmit 100 HP to the prop. Has anyone ever seen a prop adapter / spacer like this ? Is this very likely to fail and let the entire prop fly into the back of my Kolb ? Would you guys trust this ? Any thought you may have would be appreciated.

Michael A. Bigelow


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PostPosted: Sat Dec 23, 2006 9:40 pm    Post subject: Prop Spacer - Has anyone ever seen anything like this ??? Reply with quote

Michael, The thimble style prop extension is the standard for the "Lyconosaurus" engines, although I've never seen one with a wasp waste like yours. The Lycon extensions have a tapered hole through the middle, so if yours is solid, it would be a similar cross sectional area.

Rick

On 12/23/06, JetPilot <orcabonita(at)hotmail.com (orcabonita(at)hotmail.com)> wrote:
Quote:
--> Kolb-List message posted by: "JetPilot" <orcabonita(at)hotmail.com (orcabonita(at)hotmail.com)>

Here is a picture of the prop spacer that goes from my Rotax 912-S to the Kiev Hot Prop. It is made out of aluminum and the shaft is tapered to only two inches at its narrow point.

All the spacers I have ever seen have the prop bolts go all the way through from the prop hub to the steel engine output flange. With this spacer the entire load is transmitted to the prop through 2 inches of aluminum. After reading stories of high streingth bolts breaking on occasion, I am wonding how just 2 inches of aluminum could be safe to transmit 100 HP to the prop. Has anyone ever seen a prop adapter / spacer like this ? Is this very likely to fail and let the entire prop fly into the back of my Kolb ? Would you guys trust this ? Any thought you may have would be appreciated.

Michael A. Bigelow

--------
"NO FEAR" - If you have no fear you did not go as fast as you could have !!!


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