### Author Topic: Meyer-Photogrammetry Inverted 7 Bracket I7B  (Read 1186 times)

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##### Meyer-Photogrammetry Inverted 7 Bracket I7B
« on: March 08, 2011, 02:58:41 am »
Here is a comparision of 2 I7Bs  attached to OT2 aND OT8

OT2I7B 543 CALIPER UNITS LONG
OT2I7B 117 CALIPER UNITS LONG FOR SHORT "FOOT"
OT2I7B 193 CALIPER UNITS LONG BEFORE ANGLED BEND

OT8I7B 559 CALIPER UNITS LONG
OT8I7B 124 CALIPER UNITS LONG FOR SHORT "FOOT"
OT817B 199 CALIPER UNITS TALL BEFORE ANGLED BEND
********
argument 543:117
ratio 4.64
********
argument 543:193
ratio  2.81
********
argument 559:124
ratio 4.51
********
argument 559:199
ratio 2.81
********

There is excellent agreement between ratio of the height before the first bend of the
I7Bs and the 90  degree angle of the foot.

The width of OT2 is 123 caliper units
The length of OT2I7B is 543 units
********
argument 543:123::<val>:0.75

<val>=3.31
<val>I7B dim<val>length 3.5
********
Inverse <val>:<val>I7B dim<val>length3.5
0.057
********
This is interpreted as  when an assumed width of the OT2 is taken as 123 units =
0.75 inches a calculated value of 3.31 inches is obtained
D9 (Dynodon reports a measurment of 3.5 inches (post 56  Jan 23 2011)
A discrepancy of about 6% which is probably acceptable given the non critical nature of the part.

« Last Edit: April 11, 2011, 14:37:23 pm by jim miller »