Re: Howard's 47 Custom project

Posted by HH56 On 2015/4/27 14:39:32

I did think of servos. I thought they might work and was the first consideration. Looked at a few of the model car and plane types available here at one of the hobby shops but thought they seemed a little small for the job. I'm not very familiar with them and didn't have specs for what torque I thought was needed. The guy behind the counter couldn't tell me much on their requirements or operation other than what motions they had and that those he had in stock all needed a receiver package to work. I let the idea pass and went with the vacuum.

The air diverter works well with vacuum and might even be able to use the direct valve instead of solenoids but the thermostat could possibly benefit from the finer touch a servo would offer. That is one of those things time will tell. Aside from evaporator freeze prevention, the car volume is so large the thermostat may never cycle due to interior temp requirements anyway. If it does actually cycle and a finer control is needed, a servo operated by a pot leaves open some intriguing mounting options. I could envision a small pot on the end of the main switch operated independently by a thumbwheel or lever on a common shaft for a combo temp and fan speed location.