Millenium Telescope. Initial Meeting.
Format Part 1 - Planning Part 2 - Sample Designs Part 3 - Discussion/what happens next
Objectives 4 Resolve location and usage issues 4 Agree design 4 Present detailed design/cost to Committee 4 Go/No Go?
Aperture Fever…!
Part 1 - Planning...
Location/usage Most difficult part! Dedicated effort Some options 5 Dome ? Balcony ? Downstairs ? Elsewhere in school grounds
Design Goals 4 Ease of construction 4 Ease of assembly/disassembly 4 Ease of storage and transportation 4 Ease of collimation (repeatable)
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
Part 2 - Sample Designs
Kriege and Berry Obsession 20” F/5
Obsession 20” F/5 Completed scope
Obsession 20” F/5 Unpacking truss tubes
Obsession 20” F/5 Opening mirror box
Obsession 20” F/5 Inserting mirror
Obsession 20” F/5 Setting mirror down
Obsession 20” F/5 Install upper tube clamps
Obsession 20” F/5 Mirror cell assembly
Obsession 20” F/5 Truss tube clamps
Obsession 20” F/5 Securing mirror
Dan Gray 16” F/3.75 String Telescope
16” F/3.75 String Telescope Completed scope
16” F/3.75 String Telescope Base
16” F/3.75 String Telescope Close-up of bearings
16” F/3.75 String Telescope Rocker
16” F/3.75 String Telescope Square tube support
16” F/3.75 String Telescope String length adjustment
16” F/3.75 String Telescope Collimation adjustment point
16” F/3.75 String Telescope Secondary cage and spider
16” F/3.75 String Telescope Collimating
16” F/3.75 String Telescope Disassembled scope
16” F/3.75 String Telescope In car!
Greg Babcock 18” F/4.55
18” F4.55 Completed scope
18” F4.55 Gallery
Greg Babcock 24” F/4 Ultra-light
24” F/4 Ultra-Light Completed and disassembled scope
24” F/4 Ultra-Light Altitude bearing and stand
24” F/4 Ultra-Light 4” Mirror cell clearance for drive
24” F/4 Ultra-Light Trusses
24” F/4 Ultra-Light Cage
24” F/4 Ultra-Light Completed scope
24” F/4 Ultra-Light In car!
Bruce Sayre 22” F4.05 Design
22” F4.05 Design Completed scope
22” F4.05 Design Base
22” F4.05 Design Cutaway of bottom frame and drives
22” F4.05 Design Close-up of bottom frame
22” F4.05 Design Bottom portion of telescope
22” F4.05 Design Side view of rocker
22” F4.05 Design Rocker
22” F4.05 Design Mirror cell multipoint flotation assembly
22” F4.05 Design Mirror cell with flotation assembly underneath
22” F4.05 Design Drive motor assembly
22” F4.05 Design Strut attachment
22” F4.05 Design Truss tube mounting
22” F4.05 Design View above completed scope
22” F4.05 Design Secondary cage and spider assembly with baffling
22” F4.05 Design Secondary cage side view
Digital Astrophotography C2020z - Planets with 20” Newtonian
Part 3 - Discussion 4 Team for location/storage 4 Obtain 45 gal drum 4 Consolidate designs/plans –Contact designers ( ) –Monitor bigdob discussion group 4 Contact FAS/other AS for feedback 4 Possible visit(s) to other AS 4 Agree next meeting