| A | B | C | D | E | F | G | H | |
|---|---|---|---|---|---|---|---|---|
| 1 | Variable |
Value |
||||||
| 2 | f |
4.500 |
||||||
| 3 | D |
15.000 |
||||||
| 4 | F |
67.375 |
(Swazy) |
|||||
| 5 | Wood density |
0.025 |
||||||
| 6 | Aluminum density |
0.101 |
Calc CG |
Radius+Mirror Below Bearings | ||||
| 7 | Bearing radius w/ Formica |
13.938 |
book recommends |
11.00 |
14.74 |
14.688 | ||
| 8 | Mirror cell below bearings |
0.750 |
||||||
| 9 | Bearing pad separation deg |
65.000 |
book recommends |
65 - 75 |
||||
| 10 | Side bearing arc deg |
155.000 |
||||||
| 11 | Setting circle clearance |
1.100 |
||||||
| 12 | Formica thickness |
0.063 |
||||||
| 13 | Teflon thickness |
0.188 |
||||||
| 14 | Veneer thickness |
0.019 |
||||||
| 15 | 3/4" wood thickness |
0.692 |
||||||
| 16 | 1/2" wood thickness |
0.478 |
||||||
| 17 | 1/4" wood thickness |
0.250 |
||||||
| 18 | ||||||||
| 19 | Trunk height without hinges |
10.000 |
||||||
| 20 | Trunk height below hinges |
7.750 |
cage height |
7.50 |
||||
| 21 | Trunk depth |
18.625 |
||||||
| 22 | Trunk width between hinges |
33.000 |
bearing height |
|||||
| 23 | Trunk width outside hinges |
5.000 |
||||||
| 24 | ||||||||
| 25 | Unknowns |
|||||||
| 26 | Various eyepiece weights |
|||||||
| 27 | 1/4" wood thickness |
|||||||
| 28 | ||||||||
| 29 | Constants |
|||||||
| 30 | gm/lb |
454.00 |
| A | B | C | D | E | F | G | H | |
|---|---|---|---|---|---|---|---|---|
| 1 | Arm |
Mass |
Moment |
Source |
||||
| 2 | Bearings |
10.29 |
10.33 |
106.35 |
Calc |
|||
| 3 | ||||||||
| 4 | Mirror |
2.81 |
23.00 |
64.69 |
Salesman |
|||
| 5 | Mirror cell |
1.00 |
9.00 |
9.00 |
Measure |
|||
| 6 | Columniation discs |
1.25 |
0.70 |
0.87 |
Measure |
|||
| 7 | Truss connectors (lower) |
4.13 |
1.58 |
6.50 |
Est. |
|||
| 8 | Truss tubes |
31.56 |
0.24 |
7.58 |
Calc |
Length |
60.16 | |
| 9 | Top of mirror cell |
4.38 | ||||||
| 10 | Secondary cage |
64.63 |
0.88 |
56.94 |
Est. |
Cage bottom from zero |
58.75 | |
| 11 | Truss connectors (upper) |
59.25 |
1.00 |
59.25 |
Measure |
|||
| 12 | Truss inserts (upper) |
58.25 |
0.32 |
18.48 |
Calc |
|||
| 13 | Secondary mirror w/ heater |
60.88 |
0.43 |
26.28 |
Measure |
|||
| 14 | Secondary holder |
63.56 |
0.44 |
27.86 |
Measure |
|||
| 15 | Spider w/ screws |
65.38 |
0.26 |
16.70 |
Measure |
|||
| 16 | Spider hard points |
65.31 |
0.19 |
12.37 |
Calc |
|||
| 17 | Focuser |
60.88 |
1.28 |
78.04 |
Measure |
Focuser center to cage bot |
2.13 | |
| 18 | Nagler 31mm |
60.88 |
2.20 |
133.93 |
Salesman |
Focuser center to scope bot |
60.88 | |
| 19 | Paracor |
60.88 |
1.00 |
60.88 |
Est. |
|||
| 20 | Rigel finder |
60.88 |
0.17 |
10.26 |
Measure |
|||
| 21 | Outhouse baffle |
55.25 |
0.22 |
12.17 |
Est. |
|||
| 22 | Secondary heater battery |
63.56 |
0.10 |
6.51 |
Measure |
|||
| 23 | Digital set circles or slop |
58.75 |
1.00 |
58.75 |
Est. |
|||
| 24 | Additional slop |
60.88 |
0.60 |
36.53 |
Guess |
|||
| 25 | ||||||||
| 26 | Totals |
54.93 |
809.93 |
|||||
| 27 | ||||||||
| 28 | Center of gravity |
14.74 |
||||||
| 29 | Cage weight |
8.49 |
| A | B | C | |
|---|---|---|---|
| 1 | Value |
Source | |
| 2 | Digital Set Circles |
1.100 |
Measure |
| 3 | Dip |
2.18 |
Calc |
| 4 | Mirror cell corner |
0.75 |
Model |
| 5 | Mirror below bearing |
0.75 |
Est. |
| 6 | |||
| 7 | Total |
4.78 |
|
| 8 | |||
| 9 | Rocker box sides |
5.25 |
|
| 10 | |||
| 11 | Slop remaining |
0.47 |
| A | B | |
|---|---|---|
| 1 | Area |
222.04 |
| 2 | Width of bearing |
10.92 |
| 3 | L (bearing) |
14.98 |
| 4 | L (rocker box) |
15.18 |
| 5 | Dip (bearing) |
2.18 |
| 6 | Dip (rocker box) |
2.21 |
| 7 | ||
| 8 | CG |
|
| 9 | X CG of triangle |
3.20 |
| 10 | X relative to radius |
6.22 |
| 11 | Angled X |
4.39 |
| 12 | Dist from bot of scope |
10.29 |
| 13 | ||
| 14 | Pad separation angle |
Largest "r" |
| 15 | 70.00 |
13.25 |
| 16 | 65.00 |
14.00 |
| 17 | 60.00 |
14.75 |
| A | B | C | D | E | |
|---|---|---|---|---|---|
| 1 | secondary to ring |
8.25 |
|||
| 2 | Focuser board thickness |
0.25 |
|||
| 3 | Focuser height |
1.40 |
|||
| 4 | Focuser slop |
0.23 |
My heaviest eyepiece |
1.60 | |
| 5 | Camera spare |
0.00 |
Heaviest eyepiece (Nagler 31mm) |
2.20 | |
| 6 | Total = L |
10.13 |
camera+adapter+light eyepiece+1.25" adapter |
2.19 | |
| 7 | |||||
| 8 | Mirror to secondary mirror |
57.25 |
Lightest eyepiece+Adapter |
0.69 | |
| 9 | |||||
| 10 | spider to center of secondary |
5.25 |
|||
| 11 | focuser |
2.25 |
|||
| 12 | Total cage height |
7.50 |
|||
| 13 | |||||
| 14 | d=Area of 100% illumination |
0.24 |
Secondary minor axis |
2.60 | |
| 15 | Calculated minor axis |
2.45 |
|||
| 16 | |||||
| 17 | Cage I.D. |
16.50 |
|||
| 18 | Ring thickness |
1.25 |
|||
| 19 | Cage O.D. |
19.00 |
| A | B | C | D | E | F | G | H | I | J | K | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | F |
67.38 |
|||||||||
| 2 | L |
10.13 |
Slop |
0.23 |
|||||||
| 3 | Light path inside cage |
2.25 |
|||||||||
| 4 | Cell above mirror |
0.50 |
est. |
||||||||
| 5 | Eyepiece adj |
1.50 |
guess |
||||||||
| 6 | Hasp block |
0.81 |
|||||||||
| 7 | Unadjusted Z |
52.19 |
|||||||||
| 8 | |||||||||||
| 9 | |||||||||||
| 10 | Std X or Y |
8.75 |
Tubes centers are 1/2" from inside edge of the cage. |
||||||||
| 11 | Cage connection |
-0.69 |
|||||||||
| 12 | Unadjusted X or Y |
8.06 |
|||||||||
| 13 | |||||||||||
| 14 | |||||||||||
| 15 | Oak pegs |
-0.69 |
|||||||||
| 16 | Aluminum connectors |
-1.00 |
|||||||||
| 17 | Total tube adj. |
-1.69 |
|||||||||
| 18 | |||||||||||
| 19 | |||||||||||
| 20 | Mirror cell connector |
X or Y |
Z |
|
Total X or Y |
Total Z |
Len (raw) |
Len (adj.) |
Angle | ||
| 21 | Front, Front |
-0.25 |
-0.25 |
7.81 |
52.44 |
53.02 |
51.33 |
8.47 | |||
| 22 | Front, Side |
-1.44 |
-0.25 |
6.63 |
52.44 |
52.85 |
51.17 |
7.20 | |||
| 23 | Back, Side |
-0.31 |
15.00 |
7.75 |
37.19 |
37.99 |
36.30 |
11.77 | |||
| 24 | Back, Back |
0.31 |
15.38 |
8.38 |
36.81 |
37.75 |
36.07 |
12.82 |
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