dust Posted June 2, 2003 Share Posted June 2, 2003 OK, so today we started the real tinkering with the heating system, fortunatly i had the advice of a non builder to help me through the process. We started off with the assumption of just adding a duct to the top of the exhisting duct, simple enough. We then went forward to plan the use of this extra duct and promptly ran into the wheel well on the other side of the instrument panel, where the original duct ends and gets directed to each side. after consulting each other, and letting Dave, Thane and largeprim's wife continue to do "real work" on plane parts in the basement, we concluded to build a high narrow duct from the current location to just in front or better said before the rudder pedals. This should deliver all airflow from that duct to your toes. We then decided to take the additional duct, which will be located on top of the original duct and end it at the instrument panel and vent it to the pilot and front passenger's area, with vents for the rear passengers. So, we have doubled the size of the available airflow to the passenger compartment. we then went to the firewall and started hacking and whacking, largeprime was quite excited to be allowed to use a dremel and sander to remove the plans tube to feed the main duct. After that was removed we looked at the finely made piece that dave had hand crafted and we had just destroyed and realized that it was too small for the main heat duct that it was feeding. It was about 1 1/2 inches in diameter and the duct it was supplying was about 3 x 1.75. We will now fab ducts from the heat muff, to be build as part of the engine installation, that will supply the entire volume of the original duct. It appears that we may have a 100% airflow increase from the original duct and a 200% increase from adding the new duct, giving us quite a bit of additional flow with which to heat our tootsies at 25000 feet. The only thing in our way for the new duct is the botton of the map pocket, which now has a bolt through it for the elec air brake actuator and the manual pivot point for the airbrake which we have already replaced with the electric one, so both can be removed to no harm. Quote maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build i can be reached at http://www.canardcommunity.com/ Link to comment Share on other sites More sharing options...
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