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jimmyoc
27th May 2011, 14:55
Hi all, is this a UHF aerial used on the ARC-type radios. or Anntena for Radalts (Radar Altimeters) I have been told two different thingshttp://i215.photobucket.com/albums/cc138/jimmytx3/antenna.jpg

Avionker
27th May 2011, 15:16
Well.... it's kind of in the wrong place for a rad alt antenna, unless you're flying inverted, so I'm going to go with option A, as been more feasible.

Lingo Dan
27th May 2011, 15:38
I flew the Scout for about 3 years up to 1977, and never saw one with a radalt. Am pretty sure that's a UHF antenna.

For the first year or so of my time on the Scout, there was also a retractable aerial for the Larkspur (??) VHF FM radio, which could extend to be vertically below the heli. Easy to forget when landing and cost a case of beer to replace!!

ACW599
27th May 2011, 16:22
Standard 225-400MHz UHF blade antenna, made by Chelton if I recall correctly. Used on several RAF aircraft in the seventies.

jimmyoc
27th May 2011, 16:37
Thanks for that Gentlemen, very much appreciated, :ok:

floppyjock
27th May 2011, 16:51
I know the pilot i,ll check.

floppy

Two's in
27th May 2011, 17:13
Spotter alert - It's the upper UHF antenna used with the PTR 170 radio (at that time), it also had a matching antenna on the lower tail boom.

Spurlash2
27th May 2011, 17:57
The PTR-170 was a pre-set 12 channel radio, and each frequency was a physical crystal which the Pinkies had to physically insert- physically. I remember a large wooden box full of the things.

ACW599
27th May 2011, 18:20
>The PTR-170 was a pre-set 12 channel radio, and each frequency was a physical crystal which the Pinkies had to physically insert- physically. I remember a large wooden box full of the things.<

Made by Plessey and fitted to many UAS Chipmunks, with one antenna on the upper rear left fuselage and the other on the lower. The controller was on the front-cockpit upper coaming.

This style of antenna was used with other UHF radio installations, notably the ARC-52 in some 4 FTS Gnats and Hunters and several marks of Canberra.

ANORAK MODE=OFF

jamesdevice
27th May 2011, 18:29
info on the PTR-170 here

http://www.rnmuseumradarandcommunications2006.org.uk/aircraft%20equipment.pdf

listed as ARI 18197

ewe.lander
27th May 2011, 18:52
I think there were 2 Radalt aerials below, flat panels? Thats the UHF aerial, sad muppet that I am.......... :sad:

Bertie Thruster
28th May 2011, 09:15
UHF upper antenna.

(BT:ex Scout 'greenie';)) ('pinkies'= Navy?:sad:)