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Author Topic: Yak-9UT by Bert andermann  (Read 4493 times)
Massimo Tessitori
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« on: July 17, 2009, 03:00:51 PM »

Hi, Smiley
I've uploaded a report by Bert Andermann with some photos of his beautiful model and of the real thing.
Massimo

http://mig3.sovietwarplanes.com/yak179/yak9ut/yak9ut-bert-andermann.htm
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John Thompson
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« Reply #1 on: July 17, 2009, 03:10:05 PM »

Wow - it is a beautiful model! Very nicely detailed - when I first looked at the images, I thought it was the 1/48 Scale Bureau resin kit, not the 1/72 Amodel! Good work!!!

John
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Dark Green Man
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« Reply #2 on: July 17, 2009, 06:31:12 PM »


I see the myth of a 57 MM cannon on a Yak-9 fighter still persists.

here is babel-fish's translation of A.T. Stepanets test report on the Yak-9UT.
you will note the largest mentioned is the NS-45.
[/color]
Yak-9[UT] the VK -107[a] [[TSAMO], f. of NII (Scientific Research Institute) VVS, pub. 485747, d. 143: f. 35, pub. 11287, d. 3551] Yak-9[UT] with the engine VK -107[a] and spirally VISh -107[Lo] - this mho [difikatsiya] of series Yak-9 N 39-083 with the same by engine and spirally, that is characterized by more powerful cannon armament. Instead of the motor- gun [SHVAK] of the caliber of 20 mm with ammunition 120 projectiles even two synchronous machine guns [UBS] of the caliber of 12,7 mm with the ammunition on 150 cartridges on Yak-9[UT] they were established light 37- mm motor- gun N -37 with the ammunition of 30 projectiles and two [sinkh]- the [ronnye] guns B -20 (B -20) of the caliber of 20 mm with the ammunition on 120 projectiles. Outwardly aircraft was characterized by from Yak-9 the coming out from the propeller spinner muzzle brake of gun N -37. Was provided the possibility of replacing (in plant [uslo]- [viyakh]) the motor- gun N -37 of the caliber of 37 mm for the motor- guns B -20[m] the caliber of 20 mm, NS -23 of the caliber of 23 mm, N -45 of the caliber of 45 mm. [v] the last case one (right) gun B -20 must was dream mother. The possibility of the installation of different motor- guns without [sushchest]- of transient alterations and re-compositions in the aircraft was valuable and made it possible in the series production to rapidly pass to [lyu]- battle the version of armament depending on requirements VVS. [Kazh]- to house to the version of armament, naturally, corresponded their flight mass, centering, anti-nose-over angle also of years but- tactical characteristics. As far as piloting qualities and spinning [characteristics]- the tick Yak-9[UT] are concerned, they with all versions of armament remained approximately identical and the same as in series Yak-9 VK -107[a]. Maximum speed in the earth - 578 km/h and on the 2nd face C of the height 4900 m of 671 km/h (i.e. practically as in [se]- [riynogo] Yak-9 VK -107[a]); the time of climb of 5000 m under the conditions maximum rate of climb - 5,2 min; practical perspiration [lok] - 10 700 m; the flying range under the conditions of the comparative of high-speed distance (at 0,9 maximum speeds) to [vyso]- those 5000 m was 690 km, duration of flight in the same regime - 1 h of 22 min. In the technology of piloting Yak-9[UT] in practice it did not differ from Yak-9 VK -107[a], with exception of the fact that the loads on the knob from the ailerons and, especially, from the elevator were they excessively conducted Ci (this the most serious defect of aircraft). For Yak-9[UT] there was characteristically the fact that temperatures of water and oil were within the limits of the standard both under the conditions of the maximum rate of climb and in the level flight from [maksimal]- noy by speed. Yak-9[UT] with the motor- gun N -37 and two synchronous guns B -20 it had the mass flow per second of the volley of 6,0 [kg]/ and was inferior only Yak-9[UT] with the gun NS -45 of the caliber of 45 mm (9,3 [kg]/) and la -7 with Che [tyrmya] by guns NS -23 (7,3 [kg]/). Armament Yak-9[UT] [obespechi]- shaft effective destruction of aerial targets and possibility of using the aircraft for the low-flying attack of railroad [eshelo]- it is new, motor vehicles and the light armored objects. With the shooting Yak-9[UT] behaved more stably in entire speed range and with all evolutions, than Yak-9[T] and Yak-9[K], due to the decrease of the recoil force of gun N -37 in comparison with NS -37, and also [rasshi]- of rhenium of speed range. The aiming practically was not brought down with long burst from N -37 into 4-5 shots, that [obespe]- [chivalo] an increase in the accuracy of fire. Yak-9[UT] is released OKB in February 1945. accordingly [postanov]- to [leniyu] GKO dated December 29, 1944. It underwent official tests from March 8 to 29, 1945. (pilot Of [a].[A].[Manucharov], is other [zhener] Of [g].[A].[Sedov]) [[TSAMO], f. of NII VVS, pub. 485747, d. 143]. Standard Yak-9[UT] 1945 tested from March 17 to July 9 1945 g. in the conclusion by NII VVS according to the results of the State tests of standard were noted that Yak-9[UT] with the data by armament is necessary for VVS SA by aircraft and can be [recommended] for the starting into the series production [OF [TSAMO], f. of NII VVS, pub. 485747, d. 143]. Yak-9[UT] VK -107[a] it was built in series from February to May 1945. with the motor- gun NS -23 (but not N -37) and two synchronous guns B -20. In all are built 282 aircraft. In the recent weeks of war one of the parts, rearmed on Yak-9[UT], destroyed in 19 air battles 28 aircraft about [tivnika] of, including 27 FW-190A-8 and 1 Me -109G-6, after losing only two its aircraft.
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"when we lose the right to be different, we lose the priviledge to be free"--Charles Evans Hughes
Massimo Tessitori
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« Reply #3 on: July 17, 2009, 07:59:41 PM »


The book where the photos can be found is recent.
The 57 mm gun is not mentioned in the text of the book but the presence, on the page after, of  three photos and comments with the serial number of the plane is convincing enough for me and the author.
Massimo
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marluc
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« Reply #4 on: July 17, 2009, 11:56:04 PM »

Congratulations to Bert for an excellent and interesting Yak-9.He made a very accurate representation of the Yak shown in the photos,it?s the only thing that matters to me.I don?t care if the real plane had a 20 mm,45 mm or 57 mm cannon because it?s inside the plane,the model it?s just Bert?s own interpretaion based on the information he has at hand.
Thanks Massimo for the link,greetings to everyone:

Martin   
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