![]() |
Quote:
This is the relevant text from the new Part 23 certification standards - ? 23.2605 Installation and operation. (a) Each item of installed equipment related to the flightcrew interface must be labelled, if applicable, as to it identification, function, or operating limitations, or any combination of these factors. (b) There must be a discernible means of providing system operating parameters required to operate the airplane, including warnings, cautions, and normal indications to the responsible crewmember. (c) Information concerning an unsafe system operating condition must be provided in a timely manner to the crewmember responsible for taking corrective action. The information must be clear enough to avoid likely crewmember errors. ? 23.2610 Instrument markings, control markings, and placards. (a) Each airplane must display in a conspicuous manner any placard and instrument marking necessary for operation. (b) The design must clearly indicate the function of each cockpit control, other than primary flight controls. (c) The applicant must include instrument marking and placard information in the Airplane Flight Manual. I would say the above requirements are met with the proposed switch markings, even with no backlighting. Note each switch is either ON or OFF - no three position switches. Updated version with back-lit indicator "ovals" like the Carling standards for active circuits. ![]() |
Quote:
|
Re: light leakage
Is there anything that can be done to the back side of these switches to mitigate the light leakage? Can you opacify the leaking areas with black paint buildup, for instance?
|
Quote:
There could be wide variation between a master switch that toggles once a flight, and a fuel pump, smoke system, flap switch, etc. that may actuate multiple times per flight. |
Quote:
Oh, and I would move "Master Power" up to be in-line with the text on the other switches. Can leave the icon space blank, but it would look better if the text was all aligned. |
Quote:
The Master Switch label locations were improved in the latest picture just above. |
Quote:
Incandescent lamps can accommodate the full range of lens colors, including blue and green. Incandescent lamps offer dispersed beam brightness whose intensity is measured in mean squared candlepower (MSCP). They were once considered the brightest of lamp offerings, however current LED technology can now match incandescent brightness. Typical incandescent bulb life is 10,000 - 25,000 hours, depending on voltage. Bulb life can also be adversely affected by shock and vibration, voltage swings, and temperature rise. Incandescent lamps can also be susceptible to DC notching, where current flow in one direction can cause a notch to form on the filament. This "cuts" or reduces the cross section of the filament, thus causing it to weaken and eventually cease to function. The planned ones in the picture are typically used only once or twice per flight. If the lamp life is lowered by a factor of five I'll still be happy. If a boost pump is only used for 10-15 minutes per flight, it will still take a lot of flight hours to reach 500 hrs bulb on time. |
Carling switch position
All of my switches are Carling, and mine are set up to push the top in to energize. The LEDs in the top part also illuminate then.
|
Labels
Quote:
|
One more
Quote:
![]() |
| All times are GMT -6. The time now is 04:13 AM. |