Kashtanov was born in 1909.

Kapitan Kashtanov served as CO of the 4./38 IAP during the Winter War. This unit was equipped with Polikarpov I-153s.

On 17 February 1940, kapitan Kashtanov and starshiy leytenant Shepetov of 4./38 IAP claimed two Fokkers at Turku.
These claims can’t be verified with Finnish records.

Kapitan Kashtanov flew 27 operational sorties during the Winter War.

On 17 July, 38 IAP claimed four Bf 110s. One was claimed by kapitan Kashtanov (I-153 or I-16) over Staraya Russa airfield. The other three were individual claims by three I-153s pilots; leytenant Konstantin Gorin, mladshiy leytenant Vasiliy Belous and mladshiy leytenant Nikolay Gorbunov. It’s possible that these claims also were made over Staraya Russa airfield.
Leytenant Gorin was killed during the day and it’s also possible that this was during this combat.

On 21 August 1941, Kashtanov claimed one enemy aircraft in a ”taran” ramming attack.
The taran-attack took place over Demyansk and Kashtanov was killed.

At the time of his death, Kashtanov was credited with 1 biplane victory and a total of 7.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
1	17/02/40		1	Fokker (a)	Destroyed	I-153		Turku area	4./38 IAP
	1941
2	17/07/41		1	Bf 110	Destroyed	Polikarpov		Staraya Russa airfield	38 IAP
?	21/08/41		1	Enemy aircraft (b)	Destroyed			Demyansk

Biplane victories: 1 destroyed.
TOTAL: 7 and 2 shared destroyed.
(a) Not verified with Finnish records.
(b) Claimed in a “taran” ramming attack.

Sources:
Aeroram
Red Stars 7 - Talvisota Ilmassa - The Winter War In the Air - Carl-Fredrik Geust, 2011 Apali Oy, Tampere, ISBN 978-952-5877-04-5
Additional information kindly provided by Ondrej Repka.