need track replay Backup Radio

[marzzz]

Hi 

During a cold start and before starting engine , is it normal that the backup UHF radio  works well with the C&i switch on the UFC position ?

thks

Edited December 30, 2021 by marzzz

[Frederf]

It's in the checklist and I do when things are planned.

In the other title it was "it's currently 0838, step is at 0840 for a 0900 takeoff. Expect check backup uniform at step plus two (0842) and victor check five after that (0847). Viper 1-1 ready to commit." "Viper 1-2" "Viper 1-3" "Viper 1-4".

In cockpit everyone sets main power, battery, COM1 up, UHF main, channel as SOP (usually default). This happens in a few seconds after entry and then they can continue to prepare knowing they only have to listen to the radio when flight lead speaks. "Viper 1, check in backup uniform" "Viper 1-2" "Viper 1-3" "Viper 1-4". "Viper 1 flight, cleared engine start expect victor check at 47 past the hour."

Everyone starts engines and sets COM2 to flight frequency then continues their prep. At time lead says "Flight, victor check" "two" "three" "four." "Flight, push ground standby words weather. Expect taxi at takeoff minus 6." That's when everyone switches to UFC and loads data. They can listen for ATC info as lead calls for weather and clearance. Usually taxi light is silent indication ready to taxi and right before asking ATC for clearance lead asks flight advise ready before asking ground.

The benefit of progressing from backup UHF to UFC VHF to UFC UHF is that from just after cockpit entry throughout the flight all members have at least one dependable radio link at all times. If something is wrong you can tell each other as early as possible plus you know your BU stuff works.

[marzzz]

it is not the answer i have expected…

Before engine start, the C&i switch should to be on backup position for using backup radio

even in UFC position , the backup radio works 

normal or bug ?

 

[Red Dog]

I found very strange first that the C&I switch is in UFC at cold start setting. IMHO, it's wrong and should be corrected

I made a post about this and was told that the crew chief set the switches for the pilot which I know is right, but I think that crew chief should be fired to induce a start in UFC.
All the documentation I read about the F-16 said that particular switch should be in Backup

And clearly, the fact that the BUP radio works in UFC is a bug, it shouldn't which kinda proves the switch position mismatch.

 

Edited December 31, 2021 by Red Dog

[Carbon715]

Short answer: It should not work in UFC, no

[marzzz]

hi 

the bug of the UFC radio - cold start isn’t solved yet …. 

could we hope ? 

[Stroke 3]

Need track replay.

[Carbon715]

Furthermore, the B/U radio will read REMOTE with c&I placed in UFC, and not a frequency