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<< Lancair Builders' Mail List >>
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I'm planning a major work party over Christmas to do my firewall forward
installation. What this really means is that a builder-buddy is visiting
over the vacation and I'm putting him to work. My job is simple -- get the
engine and all required parts into my garage by Christmas.
The plan is to temporarily mount the engine, cleco the cowling into position,
locate all components, mark all firewall holes to be drilled, remove the
engine, drill all the holes, yank the engine mount, cut away the fiberfrax
under the bolts and install aluminum washers, and then put it all back on. I
might wait on the final re-installation of the engine, since I have to flip
the airplane over at least one more time.
Numerous questions:
1) Where is the preferred location for the oil cooler? I've seen them up by
the front on the left side, just below the baffling, and also on the firewall
as shown in the manual.
2) For firewall-mounted oil coolers, is there a readily available "duct"
that transitions from the round SCAT tubing to the rectangular oil cooler?
(as an aero engineer I'd call this a 'diffuser') I've seen some truly
hideous homemade fiberglass parts and was hoping to buy a prefabbed sheet
metal or fiberglass part. Has anyone made a sheet metal one, or had one made?
3) I've seen some really nice gascolator installations. Does the
Lancair-supplied kit come with the metal brackets and cooling enclosure? The
catalog seems to suggest that it does.
4) I assume I should have the alternator and prop governor and vacuum pump
system (if I don't go electric) installed to make sure that hoses and other
components have adequate clearance and access. Comments?
5) Does the B&C voltage regulator go in the engine compartment? I assume so.
6) Any preference for which remote spin-on oil filter? I assume the Lycoming
arrangement does not have the filter located vertically, thus you make a mess
when you remove it. The ADC spin-on filter kit seems to have a smaller
adapter than the Airwolf system, at least in the pictures. I'm not
interested in the ADC wash-it-yourself system. Should I be?
7) I'd like to hang the cowling while the engine is attached. Proably need
to anyways, to ensure that hoses are routed with adequate clearance. I'll be
using the MT 3-bladed prop, which comes with the spinner, but I won't have it
yet. Has anyone purchased a spinner without buying the prop? Can I get by
with just a backing plate for now? Would it even have to be a backing plate
for this particular prop? Couldn't I just go to an airplane junkyard and get
any ol' spinner plate, for cowling mounting purposes?
8) There are now14 AN-970-7 area washers on my airplane between the engine
mount and the firewall. They weigh almost one pound! I'm taking Brent
Regan's advice and replacing these with aluminum ones. Having trouble
finding them, though, and don't want to use a hole saw and lathe to
painstakingly make aluminum area washers. Anyone know where to find them?
The primary firewall-forward guidance I have, in terms of parts location and
routing, is the 320 manual published in 1991. Any info not included therein
would be greatly appreciated.
Thanks.
- Rob Wolf
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LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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