General Simpit Dimensions and calculations.

[LG_Barons]

Starting with my first attempts of getting the measurement for my first panel correct, I was puzzled with the size and dimensions.
Struggling with my F-4 Simpit, I programmed a little "html page" with basic functions for getting as close as possible to real measurements. Following the "A Hornet's Nest" on Youtube i was running quickly into limitations.  
Getting from the Modelviewer2 screenshot into Fusion or any other CAD programs to  tracing the lines of a unknown panel or instrument and then to the 3d Printer I had problems for finding the exact values for the correct scale.

so my workflow is:

1. make a screenshot out of Modelviewer2.

2. load upload the screenshot into my little "scaler" html page

3. locate an instrument, switch or button with known size in Real World. for Example the "Altimeter" in the F-4 is acc. MIL-PRF83491E exactly 2.875 inch in diameter.

4. Draw a reference Line between two Points in the Altimeter.

5. now pick an Instrument you want to get the "Real World" size and values, draw now 2 lines (width and height). Choose the output unit and hit calculate.

6. Read the Object size and Measurement of the desired Panel, Instrument button.

7. transfer this values into your CAD program.

8. 3d print you Panel or Instrument in the correct size.

If anybody is interested for testing. pm me.

 

Update. scaler now bugfixed and a little addon. paste the .cur file in the same directory.

 

 

f-4.cur scalerv25.html

Edited October 7, 2024 by LG_Barons
update scaler

[LG_Barons]

Comments and Questions are welcome!

[Spitty]

All I know is that panels are based on the Dzus fastener strips and they use a 3/8" between centers.

Edited October 8, 2024 by Spitty

[LG_Barons]

yes, thank you. That was also my information and that there for the standard panel is always 5,75 in in width.  

here is some Information from mycockpit.org 

A. Panel width aluminum: 5 ¾ “ =  146,05 mm

B. Panel height aluminum: 3 “Dzus” distances: 3 x 3/8” = ( 3,375”) = 28,575 mm 4 4 x 3/8“ = ( 4,375”) = 38,100 mm 5 5 x 3/8” = ( 5,375”) = 47,625 mm 6 6 x 3/8” = ( 6,375”) = 57,150 mm 7 7 x 3/8” = ( 7, 375”) = 66,675 mm 8 8 x 3/8” = ( 8,375”) = 76,200 mm 9 9 x 3/8” = ( 9,375”) = 85,725 mm 10 10 x 3/8” = ( 10,375”) = 95,250 mm 11 11 x 3/8” = ( 11,375”) = 104,775 mm 12 12 x 3/8” = ( 12,375”) = 114,300 mm And again (see before) to make it fit better, reduce it a (very) little bit.

[Deadman]

This may help you out a bit cheers

THE ADI Is an ARU 11, 5.25 inch 13.335 cm tall  by 5 inches 12.7 cm wide.

The altimeter is a an AAU-19A/A 3.25 inch 8.25 cm square 

The RWR  is 3.25 inch 8.25 cm square as well

fuel flow and RPM indicators are  2inch 5cm dia

The AOA indicator , clock and VVI are all 2.375 inch 6cm squares

[LG_Barons]

Nice, thank you.

[Deadman]

cheers