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Ok, Bob, my opinion is worth what you paid for it.
First, I have no experience with crash damaged engines. But I would, of course, look it over for obvious external damage. If there is not any external damage, the most likely place I can think of for internal damage is any forces transmitted through the transmission and e shaft. What could happen - perhaps the thrust bearings on the front end (pulley end) could be damaged, I don't know if the rotors would have hit the side walls since the rotor more or less "float" on their journal of the e shaft. I would think the thrust bearing would have taken the forces (if any). If the seals are damaged then a compression check should reveal that. In which case, I would suspect there could be more damage at least worth inspecting before sticking it in an aircraft.
Worst, is I don't know what kind of indication you would get if there was damage to the thrust bearings. Perhaps someone has had this problem and could tell you.
You could take the front cover off and the gears, etc and check that out without tearing down the entire engine. Replace the thermal pellet while at it.
There are probably two choices {:>), tear it down or don't tear it down. Having tore down and put back together the rotary about 3-4 times, its really not a hard job (I mean if you can do it in an abandoned garage in the middle of June humidity and heat then .... well, you get my drift).
On the other hand, if you have not done this a time or two I can understand the reluctance to do it to what MAY be a perfectly good engine.
If you feel comfortable it is a perfectly good engine, I would not tear it down just to put the mods in place. In fact, there is some question whether (for our aircraft needs) the change the oil jets on the e shaft buy us anything worthwhile.
I can not think of any problem with removing the tension bolts one and at time to put the silicon on them. Although, I have never done that and have had no problem with tension bolts in my 300 hours (just about everything else but not tension bolts {:>)). I might do that to the one exposed bolt (also one of the longest - put some heat shrink over it.
Anyhow, you have my $0.02 worth. Don't bother sending the 2 cents, just send the 37 cent stamp you would have used {:>)
Ed
----- Original Message ----- From: "Bob Perkinson" <bobperk@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, December 02, 2005 6:47 PM
Subject: [FlyRotary] Renesis Inspection and Mods
Let me throw this out there again. I have the opportunity to purchase a
Renesis that came out of a 2005 RX8 that was totaled with 1000 mile on it.
This engine is complete except the alternator.
Where would be the most likely place that this engine might sustain damage
associated with a crash? I sure don't want to get this engine home and find
that there might be damage in a spot that would be obvious to the well
informed on this list.
My next question is do I tare down a perfectly good engine and do the
internal mods to the oil jets in the E shaft? I don't really want to go
into a factory built engine if it is not necessary, (1000 miles is not much,
about what I put on my truck every two weeks and those factory guy's have a
lot more experience and certainly better equipment than I). If not then what
problems might be caused by removing and replacing the tension bolts one at
a time to coat them with silicone to dampen the vibration?
I know that the thermal pellet will have to go but there again you don't
have to open the housing to replace it.
I know that there are a bunch of ya'll out there that have opinions so let
me hear them.
Bob Perkinson
Hendersonville, TN.
RV9 N658RP Reserved
If nothing changes
Nothing changes
--
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