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Acars /VHF 737-300  
User currently offlineAGM100 From United States of America, joined Dec 2003, 5407 posts, RR: 16
Posted (10 years 9 months 3 weeks 5 days 7 hours ago) and read 3638 times:

Any one have info on this. Can the High frequency comm system be used instead of adding a 3rd VHF system for ACARS reporting. I don't need all the technical info just need to know if it has been done before. The aircraft has 1 & 2 VHF now but the customer wants to add ACARS and is assuming they will have to add 3rd VHF.


You dig the hole .. I fill the hole . 100% employment !
6 replies: All unread, jump to last
 
User currently offlineAGM100 From United States of America, joined Dec 2003, 5407 posts, RR: 16
Reply 1, posted (10 years 9 months 3 weeks 5 days 6 hours ago) and read 3586 times:

No body replied ,, I since found out that it only works if the HF system has digital data link capability. Like in the Collins HFS900B system.

Probably useless info , but you never know.

Merry Christmas everyone



You dig the hole .. I fill the hole . 100% employment !
User currently offlineH. Simpson From United States of America, joined Mar 2001, 949 posts, RR: 3
Reply 2, posted (10 years 9 months 3 weeks 5 days 3 hours ago) and read 3526 times:

I believe HF cannot replace the VHF ACARS...especially on domestic flights because VHF is the primary tool for communications (voice and data)

However it's possible that the government requires airplanes to equip with a HF radio...not only for oceanic report, but for HFDL (HF Datalink) as well Big grin

good luck and merry xmas


User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 3, posted (10 years 9 months 3 weeks 5 days 3 hours ago) and read 3523 times:

ACARS is dependant on the ground receivers' capabilities for its function.
If you can get a contract with ARINC or procure the radios for your own HF 2 way comm then you can have whatever your little heart desires.
If you're going to use the existing network and not develop your own then you'll need a third VHF.
Believe me, it isn't that big a deal on a 37. There's plenty of STC's and Boeing installation drawings in the system to make it very straightforward and relatively inexpensive compared to setting up your own network.



One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently onlineAAR90 From United States of America, joined Jan 2000, 3474 posts, RR: 47
Reply 4, posted (10 years 9 months 3 weeks 5 days 1 hour ago) and read 3521 times:

Can the High frequency comm system be used instead of adding a 3rd VHF system for ACARS reporting.

Sure, if that's what you want to do. ARINC or whomever your service provider is will need to be compatible as well.

I don't need all the technical info just need to know if it has been done before.

Yes, some AA international aircraft have used HF datalinks in the past. I don't think any do today though.

The aircraft has 1 & 2 VHF now but the customer wants to add ACARS and is assuming they will have to add 3rd VHF.

Depending upon certification requirements, you can have the ACARS utilize either of the currently installed VHF radios. Check the owner's certification requirements carefully. It is possible, but may not be legal for owner, user, location, aircraft, etc.



*NO CARRIER* -- A Naval Aviator's worst nightmare!
User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 5, posted (10 years 9 months 3 weeks 5 days ago) and read 3498 times:

The aircraft has 1 & 2 VHF now but the customer wants to add ACARS and is assuming they will have to add 3rd VHF.

Many of the AAL DC-10s only had two VHF systems installed. VHF 1 (or was it VHF 2?) was switchable between VOICE and DATA. So this could be an option.

However, a third radio would be the way to go in a two person flight deck. It keeps the workload down.



"Eagles soar. But weasels never get sucked into jet intakes.."
User currently offlineAGM100 From United States of America, joined Dec 2003, 5407 posts, RR: 16
Reply 6, posted (10 years 9 months 3 weeks 4 days 23 hours ago) and read 3500 times:

Thanks to all who replied. The customer is going to add in 3rd VHF and Avioniker is right , plenty of info and STC 's. I was trying to save the customer some money and had heard of HF being used. But it is going to be a small mod to add the 3rd especially without a control head.

Keep them flying !!




You dig the hole .. I fill the hole . 100% employment !
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