Mar 19, 2017 I have noted on both the PMDG 777 and 747 V3, that when the number 1 and 2 NAV radios are set to auto tune, they always both tune to the same VOR/DME frequency. Last time this came up, which it does occasionally, the answer is that for positioning purposes the aircraft is not using two of the same navaid. Jul 16, 2012 Rockwell Collins retirees' gift aboard last flying B-29. Of the radio was an auto-tune device developed by Collins Radio founder Arthur Collins that saved signalmen quite a bit of time finding.
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The AN/ART-13 was a radio transmitter manufactured by Collins Radio that found widespread use during and after World War II in military aircraft.
History[edit]
In 1940 the Collins Radio Company designed a new radio transmitter for the US Navy. The transmitter, Navy designation ATC, was later re-designated under the Joint Army-Navy (JAN) system as T-47/ART-13. The Army Air Force adopted a slightly improved version as the T-47A/ART-13, most made by Stewart-Warner. The USAAF matched the AN/ART-13A with the BC-348 receiver, whose -R and -Q models were known under the JAN system as the AN/ARR-11. The resulting communications system was known as the AN/ARC-8 and was the liaison radio set on many larger USAAF aircraft beginning late in World War II. Some were still in service in the early 1970s.
The earlier AN/ART-13 was widely used in post-World War II Navy aircraft, being paired up post-World War II with the Navy's AN/ARR-15 auto-tune receiver. Xone 2d traktor scratch pro. The resulting communications system was known as the AN/ARC-25. Its replacement began with the Collins AN/ARC-38 AM transceiver in the early 1950s, which in turn was upgraded to the AN/ARC-38A USB transceiver in the late 1950s. The Russians made nearly exact copies of the AN/ART-13 transmitter (called RSB-70 and R-807) for use on their military aircraft. It is thought that they obtained AN/ART-13 units from battle damaged B-29bombers that landed in Russia during World War II. It was well known that the Russians copied the B-29 bomber calling their version the Tu-4.
Enola Gay, the B-29 Superfortressbomber that dropped 'Little Boy', the first atomic bomb on Hiroshima, Japan was equipped with the AN/ARC-8 combination.[1] The AN/ART-13 is used today by ham radio operators interested in restoring and operating historic military gear.[2] It is often paired with a BC-348 military receiver of World War II vintage or the later AN/ARR-15 autotuned receiver of postwar vintage.[3]
Performance[edit]
The AN/ART-13 operated in CW (code), MCW and AM (voice) modes and covered LF, MF and HFfrequencies up to 18.1 MHz. It had ten autotuned VFO tuned channels that could be preset. Fuzzpilz oatmeal vst download. Post-war modifications by COMCO and other companies added crystal frequency control capability and were approved for use on civil airliners. Power output was approximately 100 watts using an 813 vacuum tube as the final amplifier. Under favorable atmospheric conditions communications could be established between aircraft and ground stations separated by thousands of miles.
See also[edit]
References[edit]
- ^http://aafradio.org/flightdeck/b29.htm AAFRadio – U.S. Military Aircraft Avionics from 1939 to 1945
- ^http://www.radioblvd.com/art13.htm
- ^http://www.collinsclubs.com/carc/b-29/radio.html B-29 Radio Project, Collins Amateur Radio Club