Lavochkin La-7

Handmade scale model RC plane (scratch build)

Lavochkin La-7

Materials: 3mm, 5mm Axton (Leroy Merlin) XPS foam (or Depron 3mm, 6mm) + Balsa wood 4x4, aircraft plywood 2mm, UHU Por glue
Wingspan: 762 mm (30")
Length: 660 mm
Flying Weight: 256g
Flying time: 10-15 min
Motor: MF2203-1900KV (19,5g)
Propeller: 8043 (6,5g)
Receiver: FrSky S6R (12g)
ESC: VGood 12A (14g)
Servos: EMAX ES9051 (5g)
LiHV battery: 1100mah 2S 7.6V
Stainless Steel Spring Wire 1 - 1,6 mm
Retractable Landing Gear: HY011-01802 (1g x 2) were broken at the first landing
Wheels 40 mm
Carbon Fiber Hollow Tube: 500x2x1mm
Nylon Control Horn with Clevis (0,52+0,34g):
Control Horn (0,5g)
Hinge Linker (24mm):

Free plans (templates)

Print in actual size (100%) A4 210×297mm on 200g/m2 paper. Download PDF
If you want a larger scale print 133% A3 297×420 mm (Wingspan: 1013mm (40"))

Full Build Video & maiden flight

lavochkin la-7 decals

Spring 1944. On the Eastern Front, a new La-7 fighter appeared (originally designated as L-120 or La-120). The aircraft is a further evolution of the La-5FN. The La-7 contains a number of improvements, such as a new wing design, a new cockpit and movable air intakes in the oil cooler. It improves aerodynamics, and the workmanship allows speeds up to 680 km / h. Production of the La-5 FN continued, and the two aircraft fought side by side.
La-7 was rarely used to attack ground targets, but the last La-5 FN. A total of 5,753 La-7 fighters were produced.
The moto installation underwent major modifications, the glider was also lightened, the center section was redone, and a number of other changes were made. As a result, the aircraft's flight performance was improved compared to the La-5FN. It was supposed to install armament from 320-mm synchronous cannons, but most production vehicles were released with two cannons. The complex of modifications worked on several aircraft, tested since August 1944. Serial production of the La-7 began at the Moscow aircraft plant number 381 in May 1944, then such aircraft began to produce the Gorky plant, and later - the plant in Ulan-Ude. The total production volume was 6335 vehicles, incl. 2236 in 1944, 3669 in 1945 and 430 in 1946.
Major modifications:
La-7 - ASh-82FN engine. Armament - two 20-mm synchronous cannon SP-20 (total ammunition of 340 rounds). Since March 1945, some of the aircraft received three UB-20 cannons (150 rounds per barrel) - 368 of these aircraft were manufactured by Plant No. 381. A total of 5753 aircraft were produced.
UTI La-7 - double training version. In 1944-1945. Plant No. 21 built 582 aircraft.
The high-altitude version with a turbocharger, machines with ASh-83 and ASh-71 engines, as well as La-7R with an additional liquid-propellant engine were not serially built.

Service and combat use

The combat debut of the La-7 took place as part of the 19th IAP in June 1944 during Operation Bagration in Belarus. Soon, such aircraft were armed with the 3rd Guards. IAD, which fought in the Baltics. The planes flew to cover ground forces, escort bombers and attack aircraft. In the fall of 1944, La-7s received a number of other units that also fought in the Baltic States - in other sectors of the front, La-7s appear in noticeable numbers only in 1945.
On February 10, 1945, there were 433 La-7s at the front, and this number was constantly increasing. By May 1, there were already more of them than La-5 - 967 against 676. La-7 participated in all major operations of the final period of the war. In Hungary, two regiments of the 295th IAD fought on them, in East Prussia - the 523rd IAP. Several regiments, including the 9th Guards. and 32nd Guards. IAP, participated in the Berlin operation. Most of the victories on the La-17 - 14 - were won by I. Kozhedub from the 176th Guards. IAP. This number also includes the Me 262 jet fighter, but does not include 2 American Mustangs, shot down in April 1945 by mistake.
By May 1945, the La-7 began to enter the air defense and naval aviation, but they did not have time to take part in hostilities.
To participate in the war with Japan, 392 La-7s were concentrated in the Far East (including 79 in the aviation of the Pacific Fleet), but they practically did not have to fight.
In the post-war period, the last La-7s were operated in combat units until 1950, and in schools - somewhat longer.
In March 1945, deliveries of La-7s began to the Czechoslovak 1st mixed air division, but they did not have time to participate in the battles. In June 1945, the Czechoslovak Air Force had 54 La-7s (local designation B-97).
La-7 became the pinnacle of the Lavochkin fighters development during the war. The aircraft was superior to its main enemy - 190A - in speed, rate of climb and maneuverability, and had quite powerful armament. The weak point of the La-7, especially in the initial period of operation, was the unreliable operation of the motor unit. The mixed design of the airframe with a predominance of wooden elements led to the fact that the resource of the La-7 was determined at two years - unacceptably small for peacetime. But during the war, the La-7 was perhaps the best Soviet fighter. La-7 became the crown of the development of Lavochkin fighters during the Great Patriotic War and remained in service until the mid-1950s. They were used during the Korean War.

Flight performance of La-7 aircraft

type ASh-82FN
power, h.p. 1850
Wingspan, m 9.8
Aircraft length, m 8.67
Aircraft height, m 2.54
Wing area, sq. m 17.59
Weight, kg:
empty aircraft 2605
normal takeoff 3265
Maximum speed, km / h:
by the ground 592
at an altitude of 652
Climb rate at sea level, m / s 18.52
Time to climb 5000 m, min 5.0
Practical ceiling, m 10750
Flight range, km 820