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paul malcolm booth wrote:
G'day Ernest,
I'm a lurker from Downunder, could you please advise details of the electric water pump in your photo?. Also is it instead of, or in addition to the original pump?. Where is your radiator located?. We are looking at a rear fuselage radiator, behind baggage area,- long hoses, extra pump?.
Regards,
The pump is a Moroso brand pump designed for a Chevy. $300 or so from Summit or Jegs (I forget which). The water enters the center, and exits through the two legs, which are detachable. I have 1" hose from the engine into the pump. I tapped both the legs for 3/4" NPT fittings. One I left in its original orientation and passed the fitting through the firewall. This leaves a nice fitting sticking right out of the firewall. 3/4" hose leads to a 13"x11"x3.5" radiator in the strake.
http://ernest.isa-geek.org/Delta/Pictures/Radiator.jpg
http://ernest.isa-geek.org/Delta/Pictures/RadiatorDuctFront.jpg
http://ernest.isa-geek.org/Delta/Pictures/RadiatorDuctTop.jpg
http://ernest.isa-geek.org/Delta/Pictures/RadiatorDuctTopFront.jpg
Fabric ducts carry the exit air to a composite shark-gill exit on the top of the strake that is integrated with the retractable main gear's wheel well. I made the shark-gill vent louvres part of the strake skin, but I decided that it makes maintenance of other things a nightmare. I cut them out, joined the top skin with the wheel well, and will build a removable vent cover "any day now".
http://ernest.isa-geek.org/Delta/Pictures/FabricDuct5.jpg
http://ernest.isa-geek.org/Delta/Pictures/FabricDuct6.jpg
http://ernest.isa-geek.org/Delta/Pictures/FabricDuct7.jpg
http://ernest.isa-geek.org/Delta/Pictures/FabricDuct8.jpg
http://ernest.isa-geek.org/Delta/Pictures/RightFuselageTopSkin3.jpg
http://ernest.isa-geek.org/Delta/Pictures/airpath.jpg
http://ernest.isa-geek.org/Delta/Pictures/CoolingAirExitGillsRemoved.jpg
The other leg of the pump, I turned around to face forward. I'll have a smaller heat exchanger in the engine bay. I haven't even started on that yet, except that I have a candidate radiator core. The coolant returns to a homemade backflow preventing Y joint that I made up from pieces of aluminum NPT fittings (McMaster Carr). 3/4" from the radiators, and 1" back out to the engine.
http://ernest.isa-geek.org/Delta/Pictures/DSCF1387.JPG
http://ernest.isa-geek.org/Delta/Pictures/DSCF1389.JPG
http://ernest.isa-geek.org/Delta/Pictures/DSCF1390.JPG
http://ernest.isa-geek.org/Delta/Pictures/DSCF1392.JPG
The hoses come into the engine with an aluminum block, drilled and tapped for 1" NPT hose nipples. I got two elbows from Autozone and the filler neck is made from more McMaster-Carr aluminum pipe fittings: one 1" NPT Tee, two 1"NPT nipples, one 1"x6" NPT pipe. A chunk of 1/4" 6061 plate, drilled and tapped for 1"NPT gave me something to mount the filler cap to. A couple of aluminum sheet pieces connect the filler neck to the firewall.
http://ernest.isa-geek.org/Delta/Pictures/EngineFirewallForward_Feb2008.jpg
The oversized lines act as my reservoir. The filler neck will be left mostly empty, providing the "pressure spring" that Al Wick champions. The water will vent overboard, just to the side of the canopy, if the engine overheats (providing an respectable "Oh! Sh!!" factor).
Writing this up, I notice that I don't have much pictorial detail of this setup on my website. I'll attempt to rectify that situation "real soon now".
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