Are there any published tables for random vibration levels for different aircraft and different zones (locations within the aircraft)? In particular I'm looking for data for military aircraft; DO-160 gives levels if you have no service data but MIL-STD-810F doesn't (see FIGURE 514.5C-8).
Hi,
I have a problem printing a small Gannt chart.
When I try to fit it onto a single page I get most of the schedule but I am missing some bars/milestones as the printed timescale does not cover the whole project (hence some of the milestones etc are "off" the right hand side of the page).
I...
This question has been asked before but not answered.
Has anyone got a cross reference for RTCA-DO-160 test methods compared to MIL-STD-810F, MIL-STD-461 and MIL-STD-704.
(I thought I'd posted the following but it appears not so I'll try again)
I've a question about grounding as follows.
I have a data logger that uses an isolated DC power supply. Hence the power return on the input to the DC/DC converter is isolated from the 0V on the other side.
There is a...
Can anyone help me to understand the differences between pre and post detection diversity combiners.
I'll describe the application.
I've a digital PCM signal that is being transmitted at S Band (say 2GHz). It is transmitted using left and right hand circular polarisation.
The receiving...
How do I go about testing the following - is there a standard (Like Mil-STd-810F)?
If a component is placed on the rotor of a helicopter blade then what vibration test level should be used.
The unit will experience mainly a constant G which is dependent on rotational speed and radius from the...
Is there a good book or article which describes how to design and test a good fixture for vibration testing (say for random vibration testing of small electronics products)
Some ideas....
Simulate the mass of the test specimen and weight distribution if possible.
Test the fixture with the...
DO any of you use web based project document management systems......ones where remote users can log in and view documents?
If so which ones would you recommend or if you don't want to name them then what features do you like?
Alternatively have you use an Intranet based system.
I'd like one...
What document would you use to show a customer what you are going to do in order to meet their statement of work (you've already been awarded the contract)?
So for example if they want a piece of test equipment mounted on a ship and you have done some analysis to show that an anti-vibration...
I'm looking for ideas for removable captive screws. I have seen some before but can't remember where.
The screw/bolt is used to fasten an electrical connector to a captive nut in the mating connector. The screw is normally threaded at the tip but half way up the shaft it is reverse threaded (a...
Hi...sorry for cross posting but I was advised that this section may be also help.
Can anyone help to explain a profile in Mil-STd-810.
The profile is shown in Fig 514.5C-9.
It's a vibration profile for propellor aircraft.
L0 is the g2/hz value for the first prop frequency. The profile rolls...
Hi,
Can anyone help to explain a profile in Mil-STd-810.
The profile is shown in Fig 514.5C-9.
It's a vibration profile for propellor aircraft.
L0 is the g2/hz value for the first prop frequency. The profile rolls off at 6db/octave. How do I work out the g2/hz for the other frequencies...
