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Old 05-10-2009, 07:03 PM
craptech is offline
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CRAPTECH
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United States, FL, Destin
Joined Feb 2007
295 Posts
MPI spinners, any problems?

In the last few months I have bought two MPI 5 inch spinners from TBM.
Both of them have come apart on me on the first flight.
The first was on my 40% Carden, first flight after a complete rebuild, and I was very careful how I mounted the spinner. Not more than 3 minutes into the flight the spinner came out of the back plate and caused a lot of damage. Ruined the paint and cracked the cowling. The second was last saturday, again brand new spinner, and I was real careful about making sure it was on correctly. I even put Lock Tight in the rim of the back plate. Same thing; about 3-4 minutes into the flight the spinner came out of the back plate and caused a lot of damage. Carved up the cowling, ruined my 3W 3D prop. It appears that the back plate does not have a deep enough grove to hold the spinner cone, or the backplate material is very solf and the lip breaks.
Of course, I will not make the same mistake three times. but have any of you all had problems with the MPI spinners?




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Old 05-10-2009, 07:52 PM
ddlstang is offline
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Broken Arrow Ok
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Re: MPI spinners, any problems?

Got 2 flights on one before it killed a brand new Mezjlick, Live and learn - Tru-turn from now on. You get what you pay for.
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Old 05-10-2009, 07:59 PM
rede2fly is offline
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GRAVITY SUCKS
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florida
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Re: MPI spinners, any problems?

hey craptech are you a plumber??? i grew up in val-p.. i have used those spinners but never on a gas plane. they cost less for a reason. i have never had that problem but again i havent used one on any of my large planes. and wont. sorry for your bad luck with them.that was a very expensive lesson
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Old 05-10-2009, 08:15 PM
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Re: MPI spinners, any problems?

Broke two of them..... Have six Tru-Turns and five Dave Browns...... Like them alot. I fluff 'em and buff 'em once a year with Never Dull and they stay like new.
WT
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Old 05-10-2009, 08:17 PM
BoneDoc is offline
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San Antonio, TX
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Re: MPI spinners, any problems?

Why don't you try calling TBM since they stand behind the products they sell?
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Old 05-10-2009, 08:44 PM
joebob2 is offline
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United States, FL, Crestview
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Re: MPI spinners, any problems?

Now you got me scared. Just put one on my SD Yak. 3 flights so far and no problems. I got a 3.5" one for the DL-55. Wonder if the bigger ones have more problems?
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Old 05-10-2009, 09:58 PM
Dan767 is offline
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That's at least a 9
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United States, WA, Federal Way
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Re: MPI spinners, any problems?

Bought one, didn't like it. Refused to even mount it. Sold it, bought Tru-Turn instead.
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Old 05-11-2009, 05:33 AM
jaguar bone is offline
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balsa, glue & gas
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United States, FL, Winter Garden
Joined Jun 2006
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Re: MPI spinners, any problems?

Wow that damage really hurts!
I have been flying a 5" one for over 1.5 years with no problem. It has been on & off many times to boot during that time frame.

Selfportrait also flys one and has had NO problem with his either.
Big plane, small pane - isn't it all about RPMs anyhow? That would make the larger displacements the safer bet- no Rede? Only whirling the thing at 7K or less?

Go figgur- time to call TBM.

Okay, this is funny in contrast :
"I only have about 10 flights on the motor, had to send it in after about 9 for the upgrades. I just noticed today that my 4.5" tru-turn spinner that I bought new when I got the engine is starting to crack a little bit at the corners of the prop cut outs. "
https://www.flyinggiants.com/forums/...-spinners.html
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Last edited by jaguar bone; 05-11-2009 at 05:39 AM.
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Old 09-09-2019, 09:37 PM
505Jeepster is offline
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United States, NM, Aztec
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Just lost a 5" off my Der Jager at the Roadrunner Scale Classic in Albuquerque, I won the event for civilian built up but never found the $72.00 spinner. The center bolt broke in flight, only 5th flight on the spinner. I'll be looking for another and use an aftermarket center bolt.
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Old 09-09-2019, 10:06 PM
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United States, SC, Simpsonville
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I bought one once, threw it away after opening it.
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