Pietenpol-List: tack drives
Posted: Tue Jan 05, 1999 10:14 am
Original Posted By: steve(at)byu.edu
you guys ever herd of westack? they make a realy good eltronic tack,and all ya gotta do is run a 2 wire instead of that big mechanicaltack housing. it only cost 100.00 for everythingrobert b.---Michael D Cuy wrote:>> I got home New Year's Day from the airport and my thermometer> read 8.5 degrees Fahrenheit. Other than the temperature the day> was perfect. Sunny, calm winds, a nice clean fresh blanket of > snow making everything look pristine. I put on layers of clothes> and a full face mask with an arctic type hat and the only thing that> really got cold were my toes. (front cockpit cover was on)> The flying was just gorgeous- you could see forever and there wasn't> another plane in the sky ! (I was the only fool in the area !)> I'm going to have to fix the tach or the tach cable though- one minute> the tach was reading 2150 rpm and the next it was reading zero !> I've got the 90 degree adapter on the tach so it might even be that.> Guess it didn't like the cold too well. I'll bet this doesn'thappen to> Ted B . in Naples, Florida !!> > Mike C. > ________________________________________________________________________________
you guys ever herd of westack? they make a realy good eltronic tack,and all ya gotta do is run a 2 wire instead of that big mechanicaltack housing. it only cost 100.00 for everythingrobert b.---Michael D Cuy wrote:>> I got home New Year's Day from the airport and my thermometer> read 8.5 degrees Fahrenheit. Other than the temperature the day> was perfect. Sunny, calm winds, a nice clean fresh blanket of > snow making everything look pristine. I put on layers of clothes> and a full face mask with an arctic type hat and the only thing that> really got cold were my toes. (front cockpit cover was on)> The flying was just gorgeous- you could see forever and there wasn't> another plane in the sky ! (I was the only fool in the area !)> I'm going to have to fix the tach or the tach cable though- one minute> the tach was reading 2150 rpm and the next it was reading zero !> I've got the 90 degree adapter on the tach so it might even be that.> Guess it didn't like the cold too well. I'll bet this doesn'thappen to> Ted B . in Naples, Florida !!> > Mike C. > ________________________________________________________________________________
) I've seen has ananalog face. The guts behind the face are digital. It uses the sameprincipal as those after market automobile tachs. They have a block thatattaches to one of the ignition leads which senses the change in themagnetic feild around the cable. Even sheilded ignition cables producesome magnetic field. The nice thing about the westach units is that theycan be added as a suppliment to the mechanical. They are also available inthe small 2 1/4" variety. Unfortunately, I do believe that they require a12V source to work which means that they wouldn't work too well on anon-electric plane. However, I've never really checked this out.Another method I've seen on portable units used to calibrate tachs andused on model planes, employs a light sensor that counts the number ofchanges in light intensity. The neat thing is that they can also becalibrated simply by pointing them at any flourescent light. Sinceelectricity in North America is provided at 60 Hz, the should read 3600rpm or some factor thereof. I think it shows up as 1800 since the meter isset for 2 light pulses per revolution, one per blade. On Tue, 5 Jan 1999 steve(at)byu.edu wrote:> I gave it consideration, but finally decided with the old (new) mechanical> unit. The digital look in a plane this vintage didn't seem to fit. I put> my digital stopwatch right next to my analog tach to remind myself how> period authentic I made it.> > Stevee________________________________________________________________________________