VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 07-16-2019, 10:22 PM
rdamazio's Avatar
rdamazio rdamazio is offline
 
Join Date: Dec 2013
Location: Santa Clara, CA
Posts: 219
Default Helicopter ELT on airplane?

Hi all!

I need to buy an ELT for the -10 I'm building, and I've been offered a good and very well-priced ELT, but it's a helicopter version (Kannad Integra AP-H) rather than airplane version. Does anyone understand the differences well enough to advise whether this is reasonable to use on an airplane?

My naive understanding is that they have sensors in multiple directions (since the helicopter won't necessarily be moving forward when it crashes), so technically it'd work at least just as well, if not better, than the airplane version, but I suspect there must be a catch maybe it activates too easily for an airplane?

Thanks
__________________
Rodrigo Damazio Bovendorp
San Jose, CA
RV-10 builder #41623
Build log at http://www.airplane.build/
VAF dues paid
Reply With Quote
  #2  
Old 07-16-2019, 11:19 PM
Pilot135pd's Avatar
Pilot135pd Pilot135pd is offline
 
Join Date: Jan 2019
Location: Ben Wheeler, TX
Posts: 389
Default

I don't know the answer to your question except regarding your comment that it would activate easier in the airplane I think it would be the other way since the helicopters vibrate so much and bounce around more than an airplane.

That was just my immediate thought when you mentioned it since I've been flying both for many years.
__________________
RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

Exempt by 3 out of the 10 ways but I still donated.
Reply With Quote
  #3  
Old 07-17-2019, 06:08 AM
turbo's Avatar
turbo turbo is offline
 
Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,070
Default

The Heli unit is to sensitive and designed to activate in a different direction. Good thing you asked the question here.
How do I know, I activated mine in a steep turn pulling hard.
__________________
TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,100+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI
VAF #840 EAA AOPA FAC FABA QB SPA
RV HOTEL LOCATION oct thru may.
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
Reply With Quote
  #4  
Old 07-17-2019, 08:19 AM
flightlogic's Avatar
flightlogic flightlogic is offline
 
Join Date: Nov 2013
Location: Prescott, AZ
Posts: 1,538
Default G switch

The G switch adds one axis. The thought is that vertical impact is more likely to happen. I would think this is just fine for an RV. Stats show that ELTs are not very good at activation in some incidents.... I would think newer tech would be in order. Like an air bag sensor... perhaps. But I am not holding my breath.
__________________
"Kindness is never a bad plan."

Work bio: Avionics tech support; ATP rated in planes and Helicopter Instructor law enforcement tactical radio systems. Blessed to fly my RV9A to work every week.
Reply With Quote
  #5  
Old 07-17-2019, 08:45 AM
Canadian_JOY Canadian_JOY is offline
 
Join Date: Aug 2007
Location: Ontario, Canada
Posts: 2,036
Default

Rodrigo - the short answer is that you are better off not installing an "H" model ELT in your fixed-wing aircraft.

As has been indicated in previous posts, the H model contains a completely different G-switch mechanism which is unsuited to use in a fixed-wing aircraft.

If you take a read through the installation manual you'll see the Integra (non-H) can be installed in helicopters with the unit inclined on a 45 degree angle to the longitudinal axis of the helictoper. Note the H model is installed either parallel to or perpendicular to the longitudinal axis of the helicopter. Note also the manufacturer specifically includes this note in the installation manual (Page 15 of DOC09081E).
"IMPORTANT: AF-H INTEGRA is designed to be mounted on board
helicopters only."
https://www.orolia.com/sites/default...GRA-ELTs_0.pdf
Reply With Quote
  #6  
Old 07-17-2019, 01:17 PM
gmcjetpilot's Avatar
gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 3,852
Default

Quote:
Originally Posted by rdamazio View Post
Hi all! I need to buy an ELT for the -10 I'm building, and I've been offered a good and very well-priced ELT, but it's a helicopter version (Kannad Integra AP-H)
H ELT has both Horz and vertical G sensing, where airplane is Horz only, fwd and aft. ELT's are not that expensive. Also you want newer one that operates on 406 MHz and has GPS position.

That model lists for $1300. That is nice and all but what are battery cost. What is a good deal. You can by a good 406 ELT for $400. I am guessing the Kannad battery cost a lot....

If you set it off every time you land that might be an issue. Contact the Manufacture and ask them if you can use it in a plane or turn off the Vert G sensor.
__________________
George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767
Reply With Quote
  #7  
Old 07-17-2019, 05:56 PM
togaflyer togaflyer is offline
 
Join Date: Apr 2013
Location: Cleveland Ga
Posts: 535
Default

ELT is not compatible. Helo and airplanes have different impact geometry.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:38 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.