[Request]P_series Rear Alerm Rada - Printable Version

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+---- Thread: [Request]P_series Rear Alerm Rada (/showthread.php?tid=69698)

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[Request]P_series Rear Alerm Rada - Fenbeiduo - 16.04.2010

EX：p-38L，p-51D
so：who can made it？ :roll:

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Re: [Request]P_series Rear Alerm Rada - Guest - 16.04.2010

Fenbeiduo Wrote:EX：p-38L，p-51D
so：who can made it？ :roll:

Maybe you should give us more information :???: and ask POLITELY instead of making a clueless DEMAND!

And sorry admins if I cause any trouble.

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Re: [Request]P_series Rear Alerm Rada - Bearkiller72 - 16.04.2010

[quote="Verh

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- Fenbeiduo - 16.04.2010

sorry for my English
I can't describ it clearly
I mean radar----'RT-34/APS-13' is fixed on the rear of p-38&p-51
it's true!
U can Google it

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- Cuccos19 - 16.04.2010

As I wrote it at SAS forum, this is must be the radar warning receiver of the P-38L. I didn't know what the hack is the three horizontal bar at the lower starboard fin of the P-38L, and only the L. I search a bit and found that.
http://www.duxfordradiosociety.org/rest ... aps13.html
http://www.radiomilitari.com/aps13.html
http://en.wikipedia.org/wiki/List_of_radars
I don't know how does it warn the pilot, with flashing light, sound, etc... or this has a complete radar screen/display in the cockpit as the search radars has.

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- US_GRANT - 16.04.2010

There was a light in the cockpit next to the gunsight that would come on when an aircraft got on the plane's six.

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Cuccos19 thanks for your help - Fenbeiduo - 16.04.2010

I got some info :
The RT-34/APS-13 is a low power UHF tail warning radar transmitter/receiver which was used in Allied aeroplanes such as the P51 Mustang and also the P-38L, P-47D, P-61, P-63, P-82D in the later stages of the war.

The equipment operates at 420 MHz with a receiver IF of 30 MHz and is powered by an internal rotary generator which is supplied from the aircraft 27V dc system.

The electro-mechanical construction is all aluminium, and the equipment uses all miniature glass valves except for the voltage stabiliser which is a VR105V (0C3). The PA is two 6J6s.

Three modified APS-13 were employed as the primary radar altimeter fuse in the

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- Fenbeiduo - 16.04.2010

AN/APS-13 (SCR 718) airborne "tail warning" radar. "L" band used in fighter planes. Receiver-transmitter, Radar, 410-420 MHz, Pulse, IF 30 MHz, 17 Tubes, Used as a tail warning radar American radar helped deal out the final blows. Both atomic bombs dropped on Japan at the end of the war were triggered to airburst at 580 meters (1,900 feet) by a proximity fuze system, though it was derived from the AN/APS-13 (SCR718) tail-warning radar. The fuze system included four redundant units, known as "Archies", to reduce the possibility of a premature detonation, with the bomb detonating only when two of the Archies agreed that they had dropped through the critical altitude. There was a backup mechanical fuze system in case the electronic system failed, but it worked as advertised. ABA-1 (SCR-515-A) airborne IFF transponder, Mk. IV system. ABK Airborne IFF transponder, series, Mk, II system. AN/APN-1 (Formerly AYF) airborne radar altimeter--L band.

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- Fenbeiduo - 16.04.2010

Rear Warning Radio:
The AN/APS-13 unit is a light weight radar set that warns you,by means of an indicator light and a bell,of the presence or approach of other aircraft to your rear.




The red jewel indicator light is mounted on the left side of the instrument cowl,the bell is to the left of the seat.Control switches are provided on the panel at your right.
The equipment is automatic and is turned on and off by a toggle switch.There's also a Checking switch to test the operation of the light and bell,and a rheostat for controlling the intensity of the indicator light.
-------------revised edition pilot training manual for the mustang

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- Cuccos19 - 16.04.2010

So was it an active radar, or only a passive radar signal receiver, which see the radar waves, and not the aircraft?
The AN/APS-13 was similar to the Monica tail warning radar.
http://en.wikipedia.org/wiki/Monica_tail_warning_radar
http://en.wikipedia.org/wiki/Category:Aircraft_radars

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- Fenbeiduo - 16.04.2010

Cuccos19 Wrote:So was it an active radar, or only a passive radar signal receiver, which see the radar waves, and not the aircraft?

AN/ASP-13 seems to be a passive radar
Can be inferred from Bell and warning light.

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- Fenbeiduo - 17.04.2010

tater718 Wrote:I believe a "passice " system means that it can only detect radar waves. An "active system" transmits and recieves radar waves. The tail warning radar in WWII fighters was an active system but there was no CRT display,just the bell and the light. Were it a passive system,it would only tell the pilot that it has detected a radar transmission from the enemy AC. And active radar in WWII was used only on night fighters and some bombers for navigation and target aquisition purposes.

I know what U mean---i think.
I don't know the definition of active/passive radar.but I believe it works just like a bat : transmits sond waves-----> Meets the barrier----->recieves sond waves.
from the other hand ,I can't agree that "AN/ASP-13"is a active radar .because Mustang use it ---but Mustang never been used as a night fighter.

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- Cuccos19 - 17.04.2010

Tater718 gave an exact explonation. We also know now that P-38L and some late Mustangs (sorry, I don't know so much about P-51s to tell the exact model), but why??? Passive warning radar had no real use on an agile ww2 fighter, even not on an agile ww2 day fighter. Enemy aircrafts - Bf-109s, Fw-190, Zeros, Franks, Tonys, etc. didn't have any search radar, what this tail warning radar could detect. I hardly believe that some German twin-engined nightfighter could slip on the six of a Lightning/Mustang during a daylight operation. I know that some Fw-190s (maybe A-6 subtypes?) used at Wilde Sau squadrons fitted with search radar and a lot of antennas on the wing and on the fuselage (look like a hedgehog), but they were uncommon and I think Americans wouldn't install some insturment in large scale because of this irrelevant threat.

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- Fenbeiduo - 17.04.2010

Cuccos19 Wrote:Passive warning radar had no real use on an agile ww2 fighter, even not on an agile ww2 day fighter. Enemy aircrafts - Bf-109s, Fw-190, Zeros, Franks, Tonys, etc. didn't have any search radar, what this tail warning radar could detect.

As I said "I believe it works just like a bat : transmits sond waves-----> Meets the barrier----->recieves sond waves."

the radar which fix on P-38/51 isn't the "radar" U mentioned.
It works without receive enenmy radar wave but the reflection wave
As U can see the picture above.-------sorry for my English ,hope U can Ignore my syntax mistakes

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- TheGrunch - 17.04.2010

It works because it's an active radar. Tater's definition is completely correct, it's an active radar with only a warning bell and light.

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