Millenium Telescope.

1
Millenium Telescope.

• Initial Meeting.

2
Format

• Part 1 - Planning
• Part 2 - Sample Designs
• Part 3 - Discussion/what happens next

3
Objectives

• Resolve location and usage issues
• Agree design
• Present detailed design/cost to Committee
• Go/No Go?

4
Aperture Fever!
5
Part 1 - Planning...
6
Location/usage

• Most difficult part!
• Dedicated effort
• Some options
• Dome
• Balcony
• Downstairs
• Elsewhere in school grounds

7
Design Goals

• Ease of construction
• Ease of assembly/disassembly
• Ease of storage and transportation
• Ease of collimation (repeatable)

8
Mirrors

• Primary Mirror (Pyrex)
• Diameter, 482 mm
• Edge thickness, 38 mm
• Focal length, 2165 mm (F/4.5)
• Calculated weight 15 Kg
• Secondary Mirror (elliptical plate glass)
• Major axis, 150 mm
• Minor axis, 106 mm
• Thickness, 14.5 mm

9
Part 2 - Sample Designs
10
Kriege and BerryObsession 20 F/5
11
Obsession 20 F/5Completed scope
12
Obsession 20 F/5 Unpacking truss tubes
13
Obsession 20 F/5Opening mirror box
14
Obsession 20 F/5Inserting mirror
15
Obsession 20 F/5 Setting mirror down
16
Obsession 20 F/5Install upper tube clamps
17
Obsession 20 F/5Mirror cell assembly
18
Obsession 20 F/5Truss tube clamps
19
Obsession 20 F/5Securing mirror
20
Dan Gray 16 F/3.75 String Telescope
21
16 F/3.75 String TelescopeCompleted scope
22
16 F/3.75 String TelescopeBase
23
16 F/3.75 String TelescopeClose-up of bearings
24
16 F/3.75 String TelescopeRocker
25
16 F/3.75 String TelescopeSquare tube support
26
16 F/3.75 String TelescopeString length
adjustment
27
16 F/3.75 String TelescopeCollimation
adjustment point
28
16 F/3.75 String TelescopeSecondary cage and
spider
29
16 F/3.75 String TelescopeCollimating
30
16 F/3.75 String TelescopeDisassembled scope
31
16 F/3.75 String TelescopeIn car!
32
Greg Babcock 18 F/4.55
33
18 F4.55Completed scope
34
18 F4.55Gallery
35
Greg Babcock 24 F/4 Ultra-light
36
24 F/4 Ultra-LightCompleted and disassembled
scope
37
24 F/4 Ultra-LightAltitude bearing and stand
38
24 F/4 Ultra-Light4 Mirror cell clearance for
drive
39
24 F/4 Ultra-LightTrusses
40
24 F/4 Ultra-LightCage
41
24 F/4 Ultra-LightCompleted scope
42
24 F/4 Ultra-LightCompleted scope
43
24 F/4 Ultra-LightIn car!
44
Bruce Sayre 22 F4.05 Design
45
22 F4.05 DesignCompleted scope
46
22 F4.05 DesignBase
47
22 F4.05 DesignCutaway of bottom frame and
drives
48
22 F4.05 DesignClose-up of bottom frame
49
22 F4.05 DesignBottom portion of telescope
50
22 F4.05 DesignSide view of rocker
51
22 F4.05 DesignRocker
52
22 F4.05 DesignMirror cell multipoint flotation
assembly
53
22 F4.05 DesignMirror cell with flotation
assembly underneath
54
22 F4.05 DesignDrive motor assembly
55
22 F4.05 DesignStrut attachment
56
22 F4.05 DesignTruss tube mounting
57
22 F4.05 DesignView above completed scope
58
22 F4.05 DesignSecondary cage and spider
assembly with baffling
59
22 F4.05 DesignSecondary cage side view
60
Digital AstrophotographyC2020z - Planets with
20 Newtonian
61
Part 3 - Discussion

• Team for location/storage
• Obtain 45 gal drum
• Consolidate designs/plans
• Contact designers (email)
• Monitor bigdob discussion group
• Contact FAS/other AS for feedback
• Possible visit(s) to other AS
• Agree next meeting