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e who say it cannot be done should rrupt the one doing it. -Chinese Proverb

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

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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. - PowerPoint PPT Presentation

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

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

Page 2: 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

Page 3: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• In 100 steps or less.

1000 more!

^ ^

Page 4: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Bill O’Donnell – Gopher/holder/fetcher and (ultimately) the guy who gets to take the scope home!

Gordon Major – Draftsman/craftsman/designer

Page 5: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Discovery 12.5’’f 4.860” focal length

Here’s what we startedwith:

Good scope!Let’s make it BETTER!

Page 6: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• Objectives– Make the scope

• More transportable• Affordable• Good Looking• To hold collimation

Page 7: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• An automatic benefit of truss-tube design• Breaks apart• Stores in a smaller space• Requires less space in a vehicle

Page 8: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• Use as much of the old scope as possible• Use good materials • Cut wood to reserve as much as possible

Page 9: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Using as much of the old scope as possible

9-point flotation, all metalmirror cell

Primary mirror

Secondary mirror and spider vane

Page 10: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Using as much of the old scope as possible

Rocker box of Baltic Birch

Azimuth Bearing

Page 11: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Using as much of the old scope as possible

JMI Crayford Focuser

Altitude Bearings

Page 12: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Good Looking………….

Choice of woods and finish

Baltic birch (Primary wood)Walnut (Trim)

Spar urethane finish

Walnut veneer (In a place you would least expect it!)

Page 13: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Holding collimation

Dependant on repeatability of set-up

(we will discuss this later)

Page 14: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 15: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

Know what youare starting with.

A Discovery Recovery

Measure and recordeverything about the original scope.

This informationbecomes very valuable later on.

Page 16: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 17: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Doing as much of themath as possibleearly on saves

a lot of guessworklater.

Page 18: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Gordy Majorwith a 5’x5’ sheetof Baltic birch

Measure twice and cut once!!!!!

Page 19: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 20: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Nice Touch…..Walnut inlay!

Page 21: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Go ahead….find the seem!

Page 22: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Strong corners make for a stronger box!

Page 23: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

By my fourth visit to the Major’s, this is what greeted me intheir living room.

This was the night to do a focustest and figure the length neededfor the poles. (At LEAST atwo person job!)

Page 24: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 25: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 26: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Walnut veneer instead of Kadite

Focuser slides!!!!

Page 27: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Applying the finishand painting the inside of the box and head.

Quiz time:

Which head isshinier, the scopes or Bill’s?

Nope. Actually itis the scope that isshinier!

Page 28: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Just look at that SHINE!

Page 29: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 30: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• Critical areas– Length– Strength (Triangle)– Ease of set-up– Repeatability (same

pole in same hole)

Page 31: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

How did we attach the poles?

Simple….really!

Page 32: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 33: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

The top of the poles

Page 34: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 35: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

The pole bottoms

Page 36: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 37: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Knob does not come out

Triangle shape adds greater stabilityand repeatability of set-up.

Page 38: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 39: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 40: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Now we get critical!!!!!

Did I mention Measuring????

Page 41: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 42: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 43: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

A total of three wood types were used

Page 44: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

It’s gotta be level!

Page 45: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

It all fits just right.

The project is almost finished.

Page 46: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 47: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

The rocker box neededto be widened a bit to make way for the greater width of the box with thealtitude bearings

Page 48: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

BONUS!

A storage areaFor the shroud and a few other small things.

NICE TOUCHGORDON!

Page 49: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 50: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

A sliding mechanismis designed to alloweasy balancing whenweight is added orsubtracted fromthe top of the scope.

Pivot-point

Page 51: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Each pole is labeledand will only fitin its assigned side

The head will only fit one way.

Page 52: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 53: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 54: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Easy access to collimation screwsand fan power plug.

Page 55: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Now it’s beginning to look like a telescope…… just a little more finishing to do

Page 56: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 57: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 58: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Just a little extradetail to the mirrorcover, a piece ofweather-stripping felt helps the cover fitsnug and keeps the dust out.

Page 59: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 60: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

A total oftwo light baffles.

The top of thebox and one half-way to cell from top.

Page 61: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 62: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Set up is slightlyunder two minutes!

1st Minute

2nd Minute

Page 63: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Three minutes…..If you put on the Shroud.

Page 64: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

First Light!

And how did itperform?

Page 65: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

The view was spectacular!

Page 66: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

While it took a good amount of time to do thisproject, maybe I shouldn’t have left Judy home alone so often. She is too good at paybacks!

Page 67: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Page 68: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

Parts and materials = $362.76

Original scope cost w shipping = $1367.00

Cost of new Discovery 12.5” Truss tube w shipping = $2184.00

Page 69: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

PLUS……….

Page 70: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

• We • Designed it the way we wanted it• Got some extras not included in Discovery’s package• One-of-a-kind telescope• And most importantly…….

Page 71: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery

We got the Bragging

Rights!!!!!

Page 72: Those who say it cannot be done should not interrupt the one doing it.           -Chinese Proverb

A Discovery Recovery