lml@lancaironline.net Mailing List Archive

Craig,

I have the same concerns. I have been working with a EE and have a working prototype. I will use three of these modules. One for the pitot heat, one for the fuel valve solenoid (Lancair Turbine fuel system) and one for the prop heat. The system will measures the current draw and will be adjustable to the individual component. When a predetermined differential is detected the annunciator panel will display a fault light. You can contact me at 530-273-4042 if you are interested.

Wally Bestgen

----- Original Message -----

From: Craig Berland

To: lml@nlpi005.sbcis.sbc.com

Sent: Thursday, December 14, 2006 2:49 PM

Subject: [LML] Prop De-ice Failure Warning

I have a 4 blade MT prop with de-ice boots on my IV-P. I have not confirmed the current draw but for this discussion lets say each boot pulls 5 amps at 24 volts. So if all 4 blades were on and working, the total current draw would be 20 amps. I would like to obtain an electronic device that would measure the current draw and trigger a warning light and thus a voice warning in my Master Warning System Display if the de-ice switch was on and the current draw was less than 18 amps. The goal is to prevent one blade from tuning into a frozen stump and causing a big prop imbalance. Please help this electronically challenged mechanical engineer.

Craig Berland