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  1. #11
    Join Date
    Apr 2011
    Location
    Bishop Auckland
    Posts
    301
    Hi Chillidoggy (!)
    I'm doing a rebuild on a 1986 dax and I've thrown the spitfire heater away and gone for an inlet into each footwell / vent as you have. I put my butterfly valve above the footwell which means there is not much room for the flexi hose and Ive based it from the following website (halfway down....)
    the289register.com • View topic - BRA289 customized recreation

    underneath the inlet valve (inside the footwell), I've used a computer heater (for water cooling) and a 120cm fan which it bolts onto. The photo shows the heater bolted onto the aluminium housing - which now has a flap on one side for the footwell and a hole in the other side for hose to the demister.
    The downside is that there is no regulating between the footwell and demister. I'm going to bend the flap to the footwell until the airflow is equal..
    Hope this helps..
    James

    2013-06-01 16.05.11.jpg2013-06-01 17.15.45.jpg
    James G
    Purple Dax / Ford 260/4 speed toploader all in need of TLC and cash but the dreams are there. Dream on - car now blue and finished, 4 years later....

  2. #12
    Join Date
    Oct 2008
    Location
    Horndean, Hants
    Age
    56
    Posts
    561
    Bob
    AK GenII arrived 1st April
    Let the cursing begin.........

  3. #13
    Join Date
    Apr 2004
    Location
    East Leake, Nottinghamshire, England.
    Age
    53
    Posts
    9,291
    Email sent let me know you got it.

  4. #14
    Join Date
    Jun 2003
    Location
    Brackley, Northants, England.
    Posts
    812
    Just caught up with this thread.

    Here is my effort for the Heater in the GD and mounts up high behind the Heater in the Passenger Footwell. The Left side is for the Footwell Heating and the Right side for Demisters.
    This version used easily obtainable 30:1 motors and M4 studding as Jack screws and worked quite well with simple switches to control.
    This has been modified to use Model Aircraft servos now. I have Circuit and PCB layouts for the Controllers.

    Apart from using my little lathe to face off the Brass rods it's all made using hand tools. No wonder it took 9 years to get it on the road...

    Shackpics June 2007 001.jpg

    Denis

    If you take something to bits often enough, eventually you'll have two of them......


    GD427E039

  5. #15
    Join Date
    Jun 2013
    Location
    Margate
    Age
    59
    Posts
    500
    Fantastic, it looks like a mortar battery!

  6. #16
    Join Date
    Apr 2004
    Location
    East Leake, Nottinghamshire, England.
    Age
    53
    Posts
    9,291
    Quote Originally Posted by oglyoodoo View Post
    Just caught up with this thread.

    Here is my effort for the Heater in the GD and mounts up high behind the Heater in the Passenger Footwell. The Left side is for the Footwell Heating and the Right side for Demisters.
    This version used easily obtainable 30:1 motors and M4 studding as Jack screws and worked quite well with simple switches to control.
    This has been modified to use Model Aircraft servos now. I have Circuit and PCB layouts for the Controllers.

    Apart from using my little lathe to face off the Brass rods it's all made using hand tools. No wonder it took 9 years to get it on the road...

    Shackpics June 2007 001.jpg

    Denis
    Very impressive no way am I posting a picture of my effort now. Only operational difference with mine is I can control the foot well’s individually. What sort of circuit have you done to control the servos ? got mine working more or less now but the servos can hum sometimes for a few seconds.
    Martin

    351W 416.7 HP and 466.8 ft-lbs

    Running Mega Squirt and Edis 8


  7. #17
    Join Date
    Jun 2003
    Location
    Brackley, Northants, England.
    Posts
    812
    Martin

    The controller uses three 555 timers. One to generate a short negative going trigger pulse every 20mS and this triggers two 555s one for each servo drive. These two drivers are the same and with a 10k potentiometer produce a pulse that varies between 0.7mS and 1.7mS, 50 times a second. If you want the circuit PM me your Email address as it's in an odd file format.

    My servos also hum a bit. I think the problem is caused by a bit of friction not allowing the servo to get exactly to the right position. It might be worth disconnecting the butterflies and see if the servo on it's own is hum free . I don't think it's worth spending a lot of time on I'm sure you can't hear it above the engine.

    Denis

  8. #18
    Join Date
    Apr 2004
    Location
    East Leake, Nottinghamshire, England.
    Age
    53
    Posts
    9,291
    PM sent Denis Cheers

    Martin
    Martin

    351W 416.7 HP and 466.8 ft-lbs

    Running Mega Squirt and Edis 8


  9. #19
    Join Date
    Jan 2013
    Location
    Welwyn Garden City
    Age
    50
    Posts
    633
    I keep my servos in my planes lol!!

    SAM_0144_zpsa8f805b8.jpg20120705_191101.jpg



    Andy

  10. #20
    Join Date
    Jan 2013
    Location
    Taunton, Somerset
    Age
    42
    Posts
    11
    Hi Martin and Dennis!

    I’m currently trying to sort out some control system for my heater (demise/footwells). Is there any chance you could forward the details of your servo solutions to me together with some pics?? Cheers!!

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