Junk the smog pump. If you are going to install gyro instruments, these will cost you $1,500 for a cheap set for attitude and heading plus a 10-pound weight increase plus the smog pump and plumbing. Instead, go for the electronic flat panel display. Units like the Dynon www.dynondevelopment.com have digital gyros for attitude horizon and magnetic gyro stabilized heading, air speed, altitude, rate of climb, turn rate, slip/skid ball, voltmeter, clock/timer, g meter, plus digital altitude encoder for your transponder for $2,100. Lighting for day/night is built in. Options for OAT and AOA are a little extra. Power is less than 0.5 amp and the unit fits in a standard 3-1/8 inch instrument hole. All-up weight is 2.4 pounds. English or metric units are pilot selectable. If you want just VFR, you can shed more weight by dumping the mechanical flight gauges also. That will save another $1,500.
Sid Wood, Tri-gear KR-2 N6242 Mechanicsville, MD YSA sidney.w...@titan.com You are not ignorant A smog pump is the air pump that was used as one of the first versions of enhancing emissions control by pumping air into the exhaust to have the burning gas air mixture continue burning in the exhaust manifold when the choke was on, or divert down stream to the catalytic convertor to help it heat up so that it would begin to burn the excess unburned mixture and carbon monoxide. They have a simple air pump design and air belt driven and typically weigh about 4-5 pounds complete. If you get one from a salvage yard you will also get the fitting that allows it to be attached to the air tubes on the older car. If you put a pressure regulator inline before the instruments, and a filter, you can blow through the instruments like they do on the Beech Duchess and operate them that way. If that is prohibited by the instrument manufacturer, then you will have to drill and tap the suction hole on the pump and re-locate your fitting to that hole. Get some gasket making sheet materi! al which comes in an 8x11 sheet of different thicknesses from your local auto parts store and custom cut your own mounting gasket and mount it dry with NO silicone that can get sucked into the line and plug the instruments. You will still need some form of a regulator. Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html
