CAD render 3ring construction


Frodo - a 10 inch travel Dobson

10 inch, f/4.8 newtonian

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features!

numbers

basic considerations

 

optics
hogging out
smoothing the curve
polishing
foucault tester
figuring
silvering

 

mechanics
mirror cell
wire spider
focuser
middle ring
rocker box

 

travel and assembly

performance

acknowledgements


 

 

 

numbers

   
self made mirror
material Schott borofloat, provided by Stathis Kafalis
aperture
10 inch, 254 mm
edge thickness
24 mm
focal lenght
1211 +/- 3 mm
focal ratio
f / 4.8
 
telescope
materials
mainly birch plywood (9,18 and 21 mm) and aluminium
weight
ca. 13 Kg overall
mirror
2400 g
mirror cell
1200 g
lower ring with cell and mirror
3600 g
lower truss poles
560 g
middle ring including altitude wheels
2100 g
upper ring including focuser, spider and Rigel quickfinder
1140 g
upper truss poles
890 g
rocker "box"
4630 g
   
dimensions in travel configuration
48 cm x 46 cm x 16 cm
   
 
     

 

   © 2005 by Andreas Derwahl •  contact