[NSRCA-discussion] The good, the bad, and the ugly

[Michael Cohen]

Low viscosity PowerMaster DZ blend, 30% nitro, 20% synthetic.  I must be getting tired because my other e-mail had all sorts of bad grammar.  It won't be as funny the second time around, but I meant to say:

 
Actually, I forgot to mention that I converted the 160DZ to use Mr. Fusion so there was NO fuel.  Just a banana peel, some old beer, and a sneaker!  Who needs a CDI conversion kit!
 
How is that for a weird mood? :)


 


From: precisionaero at hotmail.com
To: nsrca-discussion at lists.nsrca.org
Date: Wed, 20 May 2009 19:50:16 -0600
Subject: Re: [NSRCA-discussion] The good, the bad, and the ugly



Actually, I forgot to mention that I converted the 160DZ to use Mr. Fusion so there was not fuel.  Just a banana peel, some old beer, and a sneaker!  How needs a CDI conversion kit!
 
How is that for a weird mood? :)
 


From: cahochhalter at yahoo.com
To: nsrca-discussion at lists.nsrca.org
Date: Wed, 20 May 2009 20:43:11 -0500
Subject: Re: [NSRCA-discussion] The good, the bad, and the ugly






I think it was running when it broke so fuel was probably present at the time of failure.... jk sorry.. weird mood
 
Chuck Hochhalter




From: Troy Newman 
Sent: Wednesday, May 20, 2009 7:31 PM
To: General pattern discussion 
Subject: Re: [NSRCA-discussion] The good, the bad, and the ugly



Fuel ?
 
 
 


From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Michael Cohen
Sent: Wednesday, May 20, 2009 5:24 PM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] The good, the bad, and the ugly
 
The Good:  I finally got out to fly today and put up flights 6 and 7 for the season.
 
The Bad:  To say I practiced flying the Masters Pattern might not hold up in court.  It had looping segments (of various radii), straight lines (some of very, very short length), roles (lets talk about mortgage rates instead); in other words, it had all the basic elements.  It also could be argued that I was flying the Wonkavator, up ways and down ways, sideways and back ways and slantways......
 
The Ugly:  5 minutes into flight #2, the engine stopped.  After a fun crosswind glide, I took the engine apart at the field to find the crankshaft-piston area very dry with shaving's everywhere, a mashed and bent (sort of) connecting rod, and a damage to the rotary valve.  I need to take pictures and post them because I have never seen damage like this.  It looks like lubricating oil was unable to get into the region and the engine just ate itself.
 
This was my 160DZ and is on the heals of breaking the shaft that supports the rocker arms on a 140DZ suddenly a month or so ago.  Is there something wrong with the lubrication system on these motors due to some kind of blockage?  Any suggestions on what to check would be appreciated.  The engines all looked clean and free of and kind of FOD when I took them apart and re-assembled them this late winter/early fall.  Before I go killing my last 170DZ, I am open to what people think I should look for (beside an OS, going electric, or gas).
 
Mike Cohen
D4
 



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