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  1. #1
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    A Working Sperry SP-50

    I just finished buttoning it up on the bench. I double and tripple checked every circuit connection before re-installing the chassis cover.

    I was able to drill a 3/4" hole in the back of the chassis so the harness had a way out, and with the convoluted black wire tubing it fits very nicely.

    24VDC power is applied here, and all of the electro-magnetically and solenoid operated switches are engaged. The disconnect will be controlled from the Boeing yoke using the switch for this purpose.

    I was unable to get the pitch & roll control micro switches working. The circuit logic is too difficult to figure out and I didn't want to start snipping the original wiring off of them. I used a SPDT detector switch that I installed for the pitch control, and I'm not bothering with the roll control since I fly it in manual mode anyway and use the Heading Select function and turn it with the HSI bug.

    I'm a happy camper today!

    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



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  2. #2
    Executive Vice President, MyCockpit


    Matt Olieman's Avatar
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    Looks fantastic

    One of these I'll have travel down to see this personally....

  3. #3
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    Hi Matt!

    Yep, one of these days when I get all of this together. I have the SP-50 to install, finish the LCD display for the Sandel HSI, finish wiring all of the indicators for the MIP, on and on. You know how it goes.

    I have so many things going on at once it doesn't seem like I'll finish any of them, but it slowly comes together a piece at a time.
    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



    Powered by FS9 & BOEING

  4. #4
    1000+ Poster - Fantastic Contributor Bob Reed's Avatar
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    Yup.. You just keep swinging away at it and a little at a time it all comes to gether. I was in the middle of a flight the other night when it dawned on me.. Hey this thing really flies!! in a sim sort of way!
    Bob Reed

  5. #5
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    I still haven't even re-installed the glareshield trim and the lighting from when I used the truck bed spray liner!

    Something always seems to come up, but at least I'm glad I finished the SP-50 modifications.
    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



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  6. #6
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    Re: A Working Sperry SP-50

    I realize this is a very old thread but can anybody tell me where to connect the 24V for the solenoids to work?

    Thank You

  7. #7
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    Re: A Working Sperry SP-50

    I am the OP of this thread. I haven't been here in a LONG time. My SP50 head is still installed in the center control stand and is wired. It's a PITA to pull because of the wiring so I can't tell you. Experimenting with a 24VDC power supply on the solenoid contacts will not damage anything.

    I'll see if i can dig up some photos. STBY.

    The new 727 after moving to my new home...





    Still looking for the SP50 photos.

  8. #8
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    Re: A Working Sperry SP-50

    Boy are you in luck...sorry thay are not very clear or detailed, but they will get you started.






  9. #9
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    Re: A Working Sperry SP-50

    I didn't realize what my user name was anymore until I saw this post. You can delete the Boeing Skunk works account if you like. I took a guess at my password because I use it for forum sites.



    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



    Powered by FS9 & BOEING

  10. #10
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    Re: A Working Sperry SP-50

    Quote Originally Posted by Michael Carter View Post
    I didn't realize what my user name was anymore until I saw this post. You can delete the Boeing Skunk works account if you like. I took a guess at my password because I use it for forum sites.



    Thanks

    removed every wire and starting from scratch
    studied the manual so I understand what solenoid (s) should trip under certain circumstances and the logic behind the switch sequence
    drawing the schematic as I "plot" along
    awaiting my arduino Teensy board and a opto-coupler relay board

    Marc

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