<HTML><HEAD>
<META charset=US-ASCII http-equiv=Content-Type content="text/html; charset=US-ASCII">
<META content="MSHTML 6.00.2800.1264" name=GENERATOR></HEAD>
<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff">
<DIV>
<DIV>That is terrible bearing life from the set-up Keith. Mine lasted about 100 hours (452 flights) until the pump finally went, which meant the engine ran lean for several flights and then the bearing went.</DIV>
<DIV> </DIV>
<DIV>Bearing no 2 has run all season and has about 32 hours on it so far, or about 150 flights; same engine with a new pump.</DIV>
<DIV> </DIV>
<DIV>Fuel is the same cool power I spoke about before: 50:50 mix of 5% CP and 30% heli mix, plus one ounce of Klotz Pro per gallon</DIV>
<DIV> </DIV>
<DIV>MattK</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid">
<DIV><FONT face=Arial size=2>Prompted by Brian's excellent news regarding the new stainless steel bearings available for the Webra 1.45/1.60 I thought I'd share the following info on my Webra bearing life (standard non-stainless steel). </FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>I keep a log of all flights including the duration of each flight (rounded to the minute). Last week I went through the arduous task of entering data on about 340 flights into MS Excel. I also keep a log of each bearing change so I was able to compile data on bearing life on over 70 hours of flight time. </FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>All of my statistics below are reported in hours because flights differ in duration. Also, the decimal points represent a fraction of an hour, not minutes. For example 2.5 would be 2 1/2 hours. </FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>I currently have three Webra engines, one in each of my two planes and one backup (thanks to the RadioSouth $259 special). I also had one Webra in which the bearings disintegrated and the engine was destroyed. Horizon replaced this engine free of charge (thanks Horizon). I have broken out bearing life times based on each engine. </FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>Webra 1: </FONT></DIV>
<DIV><FONT face=Arial size=2>- Original Bearings: 12 hrs (may be off an hour or so, first runs were not in current aircraft and not logged)</FONT></DIV>
<DIV><FONT face=Arial size=2>- Bearing 2: 13.22 hrs</FONT></DIV>
<DIV><FONT face=Arial size=2>- Bearing 3: 9.40 hrs</FONT></DIV>
<DIV><FONT face=Arial size=2>- Bearing 4: still in engine, 0.67 hrs</FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>Webra 2: </FONT></DIV>
<DIV><FONT face=Arial size=2>Original Bearings, 7.85 hrs (bearings disintegrated and destroyed engine)</FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>Webra 3: </FONT></DIV>
<DIV><FONT face=Arial size=2>Originals Bearings: 11.38 hrs</FONT></DIV>
<DIV><FONT face=Arial size=2>Bearing 2: still being used, 6.37 hrs</FONT></DIV>
<DIV><FONT size=2></FONT><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial size=2>Webra 4: </FONT></DIV>
<DIV><FONT size=2>
<DIV><FONT face=Arial size=2>Originals Bearing 9.02 hrs </FONT></DIV>
<DIV><FONT face=Arial>Bearing 2: still being used, 2.9 hrs.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>As you can see the times for replacement vary between 7.85 hrs and 13.22 hrs. If you take out Webra #2 that suffered the early bearing disintegration then the range is consistently between 9 & 13 hrs. The average being 11 hrs.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I found this quite interesting as it represents a fairly consistent pattern of bearing life.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I'd be interested to hear anyone else's results or comments. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Keith Black</FONT></DIV></FONT></DIV></BLOCKQUOTE></DIV>
<DIV></DIV></BODY></HTML>