I am thinking about fitting an adittional ASI to the rear cockpit of my RV4, to allow my rear to take a spell at the controls, whilst I check charts, eat buns, drink tea etc. There is a throttle lever fitted in the rear cockpit. He is, like me, an old Pitts pilot and is quite used to looking at the back of someones head; whilst flying and carrying out the usual sideslipping trick, to enable him to see forward when required.
In the front I already have a standard 3-1/8 Vans bought ASI gauge and a Dynon EFIS unit; also with ASI. As a pilot with 44 years experience I prefer to have two ASI's on my front panel; just in case the Dynon (electronics/fuses) fail. Both are fed by a Dynon pitot tube located in the usual place under the port wing and are "Tee'd" together behind the panel.
I suppose the real question is; can I go on adding airspeed gauges to my present static and dynamic systems ad infinitum, or is there a limit to the length of tubing that can be used and the total number of gauges fitted, without causing inacurate readings. If I add a Vans miniature (2-1/4) ASI in the rear cockpit; it will add approx a further 4' of static and dynamic tubing.
In the front I already have a standard 3-1/8 Vans bought ASI gauge and a Dynon EFIS unit; also with ASI. As a pilot with 44 years experience I prefer to have two ASI's on my front panel; just in case the Dynon (electronics/fuses) fail. Both are fed by a Dynon pitot tube located in the usual place under the port wing and are "Tee'd" together behind the panel.
I suppose the real question is; can I go on adding airspeed gauges to my present static and dynamic systems ad infinitum, or is there a limit to the length of tubing that can be used and the total number of gauges fitted, without causing inacurate readings. If I add a Vans miniature (2-1/4) ASI in the rear cockpit; it will add approx a further 4' of static and dynamic tubing.
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