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Those who say it cannot be done should not interrupt the one doing it. -Chinese Proverb

Those who say it cannot be done should not interrupt the one doing it. -Chinese Proverb. A Discovery Recovery. Or How To Turn A Sonotube Reflector Telescope Into A Truss-Tube Telescope. A Discovery Recovery. In 100 steps or less. more!. 1000. ^. ^. A Discovery Recovery.

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Those who say it cannot be done should not interrupt the one doing it. -Chinese Proverb

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  1. Those who say it cannot be done should not interrupt the one doing it. -Chinese Proverb

  2. A Discovery Recovery Or How To Turn A Sonotube Reflector Telescope Into A Truss-Tube Telescope

  3. A Discovery Recovery • In 100 steps or less. more! 1000 ^ ^

  4. A Discovery Recovery Gordon Major – Draftsman/craftsman/designer Bill O’Donnell – Gopher/holder/fetcher and (ultimately) the guy who gets to take the scope home!

  5. A Discovery Recovery Good scope! Let’s make it BETTER! Here’s what we started with: Discovery 12.5’’ f 4.8 60” focal length

  6. A Discovery Recovery • Objectives • Make the scope • More transportable • Affordable • Good Looking • To hold collimation

  7. A Discovery Recovery Transportable • An automatic benefit of truss-tube design • Breaks apart • Stores in a smaller space • Requires less space in a vehicle

  8. A Discovery Recovery Affordability • Use as much of the old scope as possible • Use good materials • Cut wood to reserve as much as possible

  9. A Discovery Recovery Using as much of the old scope as possible Primary mirror Secondary mirror and spider vane 9-point flotation, all metal mirror cell

  10. A Discovery Recovery Using as much of the old scope as possible Azimuth Bearing Rocker box of Baltic Birch

  11. A Discovery Recovery Using as much of the old scope as possible Altitude Bearings JMI Crayford Focuser

  12. A Discovery Recovery Good Looking…………. Choice of woods and finish Baltic birch (Primary wood) Walnut (Trim) Walnut veneer (In a place you would least expect it!) Spar urethane finish

  13. A Discovery Recovery Holding collimation Dependant on repeatability of set-up (we will discuss this later)

  14. A Discovery Recovery Now.....Let's Build A Telescope!

  15. Know what you are starting with. A Discovery Recovery Measure and record everything about the original scope. This information becomes very valuable later on.

  16. A Discovery Recovery You Need A Plan

  17. A Discovery Recovery Doing as much of the math as possible early on saves a lot of guesswork later.

  18. A Discovery Recovery Gordy Major with a 5’x5’ sheet of Baltic birch Measure twice and cut once!!!!!

  19. A Discovery Recovery

  20. A Discovery Recovery Nice Touch….. Walnut inlay!

  21. A Discovery Recovery Go ahead….find the seem!

  22. A Discovery Recovery Strong corners make for a stronger box!

  23. A Discovery Recovery By my fourth visit to the Major’s, this is what greeted me in their living room. This was the night to do a focus test and figure the length needed for the poles. (At LEAST a two person job!)

  24. A Discovery Recovery

  25. A Discovery Recovery

  26. A Discovery Recovery Focuser slides!!!! Walnut veneer instead of Kadite

  27. A Discovery Recovery Applying the finish and painting the inside of the box and head. Quiz time: Which head is shinier, the scopes or Bill’s? Nope. Actually it is the scope that is shinier!

  28. A Discovery Recovery Just look at that SHINE!

  29. A Discovery Recovery

  30. A Discovery Recovery • Critical areas • Length • Strength (Triangle) • Ease of set-up • Repeatability (same pole in same hole)

  31. A Discovery Recovery How did we attach the poles? Simple….really!

  32. A Discovery Recovery

  33. A Discovery Recovery The top of the poles

  34. A Discovery Recovery

  35. A Discovery Recovery The pole bottoms

  36. A Discovery Recovery

  37. A Discovery Recovery Knob does not come out Triangle shape adds greater stability and repeatability of set-up.

  38. A Discovery Recovery

  39. A Discovery Recovery

  40. A Discovery Recovery Now we get critical!!!!! Aligning Measuring Testing ...and re-testing Did I mention Measuring???? Measuring some more...

  41. A Discovery Recovery

  42. A Discovery Recovery

  43. A Discovery Recovery A total of three wood types were used

  44. A Discovery Recovery It’s gotta be level!

  45. A Discovery Recovery It all fits just right. The project is almost finished.

  46. A Discovery Recovery

  47. A Discovery Recovery The rocker box needed to be widened a bit to make way for the greater width of the box with the altitude bearings

  48. A Discovery Recovery BONUS! A storage area For the shroud and a few other small things. NICE TOUCH GORDON!

  49. A Discovery Recovery

  50. A Discovery Recovery A sliding mechanism is designed to allow easy balancing when weight is added or subtracted from the top of the scope. Pivot-point

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