Today's Message Index:
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1. 01:07 AM - Re: Continental A-80 engine "Rods" question (D Wysong)
2. 07:16 AM - IO-550B power chart (Greg Young)
Message 1
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| Subject: | Re: Continental A-80 engine "Rods" question |
> The Continental Overhaul Manual states "the numbers on the rods (meaning the
> casting numbers) go up as the rods are being assembled on the engine.
That "numbers go up" thing got me, too, Roy. A better way to state it
is that when your engine is installed on the aircraft (horizontal) the
numbers stamped on the connecting rods/caps will be on the top side of
the rods/caps (facing "up"). Has nothing to do with the numerical
order of the rods/caps. Also has nothing to do with which way the #'s
are oriented as long as they are on top of the rods/caps. Some of
mine faced "forward", some faced "aft"... but all were on "top" of the
rods/caps.
The order should coincide with the cylinder #'s embossed on your
crankcase or as called out in the overhaul manual. On my O-200, #1 is
closest to the crank/cam gears on the "back" of the engine (or the
"top" if you have your crankshaft bolted flange-down on an overhaul
stand).
> The crankshaft was bolted flange-down to a overhaul table=2C and all the nu
> mbers were indeed going up.
Yup, sounds like you got bit by the "up" comment. If the #1 rod/cap
is nearest the prop flange then you may, indeed, have them installed
upside down. Check the crankcase/manual for the proper order.
> Can anybody on this list look at the attached picture and advise if the rod
> caps are all supposed have the oil hole going the same direction? As anyo
> ne who has rebuilt the "A" series engine knows=2C the rod bearings have a n
> otch in them=2C so that they can't be installed incorrectly.
Can't see the pic but each oil orifice should point to the adjacent
connecting rod (1 to 2, 2 to 1, 3 to 4, 4 to 3). If you want to send
the pic directly to me off list I'll have a look (... and I'll return
pics of my O-200 crankshaft if you're interested).
Best of luck with it, Roy.
D
p.s. - Harry Fenton's site is an excellent source of info/tidbits for
your our old engines: http://www.bowersflybaby.com/tech/fenton.htm
Message 2
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| Subject: | IO-550B power chart |
I'm new to the big bore Continental world having just converted my Navion
from a Lyc G0-480 to an IO-550B. I've got the graphs from the Continental
manual but they are less than ideal for actual operation. I'm looking for a
decent power chart that shows % power at various altitudes with RPM, MP &
fuel flows. Anybody have one they like or a source?
Regards,
Greg Young
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