1. I dont know where you got this information from but La-11s NEVER damaged B-29s, the only recip to shoot down a B-29 was a Chinese Yak-9D.
2. During the Korean War the Chinese made no claims while flying the LA-11. The only air to air recip kills claimed by the Chinese was in the Yak-9D.
3. LA-11s were encountered 3 times and a total 8 were shot down by USAF aircraft.
4. I have doubts the Soviet ever flew LA-11s againist B-26. That would of put them in a proximity of UN troops and risked capture.
5. This information comes from ACIG a very accurate and unbiased database that tracks air to air combat since the WW2.
5. Last first, I know ACIG, see earlier thread on this forum that posted an ACIG paper about Korea co-authored by me. Nonetheless, IME their Korean War stuff is not all that accurate and unbiased. I gave input to some things but found the main authors wanted to give all benefit of the doubt and then some to Soviet claims in Korea. I would not recommend taking those lists too literally (certainly for Korea, for other wars they cover I'm personally cautious, but I don't know for sure).
1. I got it from the daily summaries and mission reports of the Far East Air Force, cross referenced to Soviet accounts of their operations. The night of December 23-24 1951, 2 19th BG B-29's were damaged by fighters while attacking Uiju airfield. One was 44-70012. The Soviet night unit at the time, 351st Fighter Regiment, was still operating solely La-11's; it started MiG-15 night ops during 1952. The 351st's La-11's claimed just 1 B-29 damaged during their tour AFAIK.
Yes, the only outright shoot down of a B-29 by a prop in the Korean War proper was 19th BG's 44-69866, downed by a pair of North Korean (Korean People's Armed Forces Air Corps, KPAFAC) Yak-9's July 12 1950. IOW ACIG is correct on this despite having it for some reason on a Chinese list, and the Yak-9 variant is wrong. The KPA had a few wood winged Yak-9M's still on hand on the eve of the war, inherited from Soviet occupation units, but the bulk of the force and probably all Yak's encountered in combat in the first phase of the war (ie. prior to Soviet/Chinese intervention in Nov 1950) were all metal postwar production Yak-9P's (Russian sources suggest this but captured but never translated NK records, maintenance and flight logs etc. from just pre war and very early war, show it explicitly). NK accounts credit this victory to their leading pilot, Kim Gi Ok.
Also though, RB-29 44-61815 of the 91st Strategic Recon Sdn which was based in Japan and flew recon Korea and elsewhere in the Far East during the war (unit and particular plane both), was downed by Soviet La-11's near the Soviet far east coast Oct 7 1952. It's usually considered "cold war" rather than Korean War. La-11's also downed a USN PB4Y-2 just before the KW, in the Baltic Sea.
2. Nov 30 1951, 4th FIW F-86's attacked a formation of PLAAF 8th Bomber Division Tu-2's escorted by 2nd Fighter Division La-11's. They claimed 9 and 3 (understandably mis-ID'ed the latter as La-9's), plus a MiG-15 which came to the aid of the prop formation. Soviet and Chinese accounts say 6 and 4 respectively Tu-2's, though agree 3 La-11's were lost, plus a MiG-15. The La-11 pilot Wang Tianbao claimed an F-86, and although none were downed Maj. Winton Marshall's plane was hit in the canopy by a 23mm from one of the Lavochkins (see "Red Wings Over the Yalu" by Zhang and "Crimson Sky" by Bruning pg 177 for the two sides of this, US records confirm damage to canopy and left wing of 50-680)
3. Maybe I'm splitting hairs but AFAIK Nov 30 '51 was the only daylight combat with La-11's in the KW proper. The 3 June 20 1952 claims by F-86's were North Korean La-9's per Soviet accounts. The 3 June 1950 credits of La-7's to F-82's and and F-51 were also certainly mis-ID'ed Yak-11's (same source as for Yak variants).
4. It's covered in considerable detail in various Russian sources, and a number of their claims correspond to night fighter attacks or losses involving B-26's. These were well inside NK where B-26's conducted night interdiction, not over the frontlines. For example a 351st La-11 first claimed a B-26 Oct 12 1951; a mission report of the 3rd Bomb Wing (Light) records an attack by an enemy night fighter at about the same time, but the B-26 was undamaged. November 16 kill credit; B-26 44-35579 was hit in the wing while being attacked, the crew believed, simultaneously by a night fighter and AA while coned in searchlights. The disappearances of RB-26 44-35668 May 15 '52 and B-26 44-35844 June 10 correspond to La-11 claims, general time and place as well as date. There are other Soviet La-11 claims which might match losses, but not certain IMO.
Joe Brennan