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Warp Drive Prop Cracked (Continental Engine)

 
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FlyboyTR



Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

PostPosted: Mon Nov 13, 2006 2:11 pm    Post subject: Warp Drive Prop Cracked (Continental Engine) Reply with quote

Hello,
I have a Series 5 Vixen with a Continental I0-240 (125HP, fuel injected) engine. Prop is a Warp Drive 70", 3 blade taper-tipped, nickle leading edge). Total time is 260 hours. This past weekend (during an out of state trip) I found a crack in one of the collars near the hub. After removal of the prop we found a second blade with a simular crack. Warp Drive will not cover becuase of the "high impulse" engine. This was the recommended prop...way back when... According to Warp I could purchase two new blades! This was really not what I wanted to hear. Crying or Very sad

My Warp system is now useless. Please understand that I am not knocking Warp Drive. I have flown 1500+ hours behind (and in front of) their product. It's just the combination of a high (sharp) impulse engine and their non-flexing, lightweight prop set-up. At this point I can NOT recommend using Warp with this particular engine. ...I'm not sure about other Continental/Lycoming engines???

Today I ordered a 70" two blade Ivoprop Magnum propeller. It will have the in-flight adjustable option. I look forward to seeing how this works out. I would appreciate any input regarding this problem...and also my choice in replacement propeller. If anyone is interested I could take some pictures of the cracked collars. Let me know. Thanks!
Very Happy


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Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
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n4546v(at)mindspring.com
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PostPosted: Mon Nov 13, 2006 2:22 pm    Post subject: Warp Drive Prop Cracked (Continental Engine) Reply with quote

What is it that makes this Continental: "a high (sharp) impulse engine"? A
difinition would help.

Regards,
Randy, Las Vegas


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FlyboyTR



Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

PostPosted: Mon Nov 13, 2006 3:11 pm    Post subject: Re: Warp Drive Prop Cracked (Continental Engine) Reply with quote

Randy,
That is certainly not my area of knowledge... however, an engine with a high or sharp impulse can (not always) be associated with a high compression engine that is usually lightly loaded. In the case of the light weight prop, there is not enough initeria to carry the crankshaft to the next firing cyliner...so there is a very slight drop (very small!) in RPM. The cylinder fires and causes a sharp impulse. If the prop has more rotating mass this is not an issue. My understanding is that the damage only occurs during start-up, shut-down and idling below 1100 RPM.

I'm sure we've got members that may better explain the impulse question. Thanks!


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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
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View user's profile Send private message Visit poster's website
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