Subject: Wankel debate
From: Paul
Date: 3/15/2001, 5:30 PM
CC: Kis Newsletter


Manta Flight Systems wrote:

Charlie,

If you can get a full 2000 hours on the experimental Mazda and it's
PSRU and all of the add-ons the savings for using the Lyc are only
$13,333.33 for the second 2000 hours.  This assumes you do the overhauls
on both of the engines yourself but use as many new parts as required for
a like new engine.

 Cost to overhaul engine     $2,000.00 $8,000.00
 Cost to overhaul PSRU         $500.00     NA
 Cost to overhaul
 accessories                   $500.00     NA
 Total Overhaul cost         $3,000.00 $8,000.00

 TBO                              2000      2000
 Overhaul cost for 2000
 hours of use                $3,000.00 $8,000.00
 Fuel                       $55,000.00 $50,000.00
 Insurance for 2000 hours   $40,000.00 $26,666.67


Mike Wills wrote:

  This analysis also totally ignores the fact that you have to have a core
engine to start with before you can overhaul anything. If you start with no
core and buy a quality rebuilt 13B from a reputable source you'll pay at
most somewhere around $4K. Start without a core and try to buy a quality
rebuilt Lyc O-360 from a reputable rebuilder and your looking at $12K - $15K.

  What if you buy a core and rebuild yourself? You can buy a rebuildable
core for a 13B for as little as a couple of hundred bucks. If half the
parts inside are total junk so what? You've only spent a couple of hundred
bucks !! But if you buy a runout Lyc, pay $6K for it and find its had a
prop strike that renders the crank unusable ?? How many more thousands are
you gonna spend on a new crank for the Lyc before you can even consider
starting the overhaul process? This actually happened to an acquaitance of
mine. His good deal O-360 cost him $16K by the time he finished rebuilding
it himself and got it in the air.

  I agree Paul, this analysis is total BS.

Mike Wills

 
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