Sovietwarplanes

Pre-GPW Aviation => Monoplane fighters of '20s and '30s => Topic started by: BLG on October 31, 2018, 05:47:55 PM



Title: Polikarpov donkeys family. Part 2 : I-16 type 4
Post by: BLG on October 31, 2018, 05:47:55 PM
Hello  everyone,

I continue the saga of the  Polikarpov  Ishaks with  the first model produced in serie, the I-16 type 4.

 (https://i.servimg.com/u/f88/19/84/12/04/type_410.jpg) (http://https: //servimg.com/view/19841204/398)

(https://i.servimg.com/u/f88/19/84/12/04/t-4_zv10.jpg) (https://servimg.com/view/19841204/401)

The type 4 was only a transitional version between the last prototype and the the definitive fighter  that Nikolai Polikarpov wanted. If the prototypes TsKB 12 and 12 bis were equipped during the first tests wtih  the M22 engine, license of Bristol Jupiter of 480 hp, the TsKB 12 was re-engineered with a Wright cyclone F3 of 630 hp and equipped with a  Watter cowling. This third prototype was very close to what will be the type 5. The Wright cyclone F3 was to be built under license by Shvetsov under the name M25, but the production was delayed,  and the type 4 was launched in series in 1934 with the M22. It kept the general appearance of the TsKB 12bis, with a NACA cowling. The number produced is not known exactly, but would be 400 between 1934 and 35. There were still active in flying schools during the German invasion.

Type 4 exists at 1/72 in resin. It is a production of HR model
.
(https://www.scalemates.com/products/img/2/7/2/630272-16864-59-pristine.jpg)

It is unfortunately derived from the mold of a type 10 because the housings of the fuselage machine guns are poorly hidden and the wing is the reinforced model that appeared on the second serie of type 5.
Despite these inacuracies , Jean Paul Bonnevile presents a nice diorama assembly here


(http://jean-paul.bonneville.pagesperso-orange.fr/airkit72/images/I16/I-16%20type%204%20Leningrad_02.jpg)

There is also a resin transkit produced by Alexandre Kozyrev under the Kajuk brand to convert the T18-24-28 ICM.
Look here   http://scalemodels.ru/articles/5882-konversija-kajukICM-1-72-i-16-tip-4.html (http://scalemodels.ru/articles/5882-konversija-kajukICM-1-72-i-16-tip-4.html)

Nothing in 1/48. Xan presented on Sovietwarplanes http://massimotessitori.altervista.org/sovietwarplanes/board/index.php?topic=2348.msg20573#msg20573 (http://massimotessitori.altervista.org/sovietwarplanes/board/index.php?topic=2348.msg20573#msg20573)   the first type 4 out of the factory 39 obtainedwith  the type 10 of Eduard and a transkit produced for him by Ricardo Rodriguez that I quoted in my first message

For met, the most fun part of model-making is partial scratch building  more than the painting Tamigawa ready to assemble kits
I preferred to use the type 5 of Amodel and modify  it a little. It exist  under 3 boxing,

"Russian" box

(https://i.servimg.com/u/f62/19/84/12/04/01_5-610.jpg) (https://servimg.com/view/19841204/164)

With Russian, Chinese, Finnish and Spanish Nationalist decals

Box "Spanish"
 (https://i.servimg.com/u/f62/19/84/12/04/02_5-610.jpg) (http://https: //servimg.com/view/19841204/165)
with Russian and Spanish Republican decals.  Bizarre to have chosen the "No tocar" in flight for the boxing of a republican plane while he was
1-captured by the Nationalists
2- immobilized for repair, hence the inscription.

Box "Type -6 winter"
 (https://i.servimg.com/u/f62/19/84/12/04/03_6sk10.jpg) (http://https: //servimg.com/view/19841204/167)

which has an additional sprue  for the skis, the propeller without spinner, the RS 82  rockets and the intrados with protection  plates against the flames of RS 82 ( to note for the next buildings, ther are  2 intrados in the box), Russian and Finnish decorations .

Here are the sprues  including the extra one (light gray) of the"Type 6" on skis and some of the decals.

 (https://i.servimg.com/u/f62/19/84/12/04/04_gra11.jpg) (http://https://servimg.com/view/19841204/171)

There are 2 canopies, closed type 4 and 5 and windshiel  that can be found on all following types.

It is short run, . Once prepared, the pieces are very accurate in shape and the engraving is fine and fairly accurate.


There are still some flaws:

Small: line of fanciful structure to fill on the extrados, and a radio hatch appeared on the type 24 . Wheel  wells to improve. Coarse wheels of too small diameter

 (https://i.servimg.com/u/f62/19/84/12/04/05_dyf10.jpg) (http://https: //servimg.com/view/19841204/168)

Big:
1-the kinematics of the landing gear   is completely wrong. Do not fix the struts where indicated and therefore those provided are unusable . They have to be redone,

2- The front plate is too angular and the cooling vents very coarse. But it will not bother me for this type 4 since the  Watter cowling has to be eliminated and a NACA cowling  to be scratched.

Here are the different steps of the conversions

With these plans, we see the main differences: the length and shape of the cowling, the wings.

(https://i88.servimg.com/u/f88/19/84/12/04/plans10.jpg) (https://servimg.com/view/19841204/699)
[size=13] 1- Engine  and its frontal fairing [/size]

Type 4 had a prototype-style Naca cowling, but the engine fairing was the same as  the  Polikarpov's I-5 and I-15. So I cannibalized an I-5 from ICM

 (https://i.servimg.com/u/f62/19/84/12/04/06_i-510.jpg)  (http://https: //servimg.com/view/19841204/173)

which gave me a very fine reproduction of the M 22 engine  and its front cowling, the two-blades propeller that rotates in the opposite direction of the following types M 25 and then M62-63.

 (https://i.servimg.com/u/f62/19/84/12/04/07_mot10.jpg) (http://https: //servimg.com/view/19841204/172)


2- The fabric cover  of the upper surface of the wing is of late type 5.
For a type 4 or early 5, the spacing between the ribs of the upper surface is wider and identical to that of the intrados. This is explained by the addition of inter-ribs to the extrados of the "reinforced" wing which appeared on Type 5 during the Spanish War and will be kept on all following types

I transfered the drawing of the plans on the wings  and widened inter-rib spaces with a grinder

It will need  smoothing the surface with Surfacer  to reduce the scratch of the grinding. After other experiences, I think  it is not the best solution, but the result is acceptable.

 (https://i.servimg.com/u/f62/19/84/12/04/10_ail10.jpg) (http://https: //servimg.com/view/19841204/166)

[size=13] 3- the wheel wells. [/size]

The I 16s had a retraction system with a hand operated cable, with a central hole in the wells and visual control windows whose shape varied. From  type 4 to 18, they  have beans shape , There is  a rectangular window  in the wall of the right well only.
Neither the Amodel kit nor the ICM reproduce them.

(http://c1.staticflickr.com/6/5333/30190580864_2e0ee3e4ed_o.jpg)

I deepened the wells by drilling the bottom and glued a new PC bottom reproducing the windows and the opening of the retraction cable. A small bit of stretched sprue figure the reinforcement.
 (https://i.servimg.com/u/f62/19/84/12/04/11_pui10.jpg) (http://https: //servimg.com/view/19841204/170)


[size=13] 4- the NACA cowling [/size]
This is the most different part of type 5, to be scratched
The first step is to remove the parts intended to receive the type-5 cowling panels

 (https://i.servimg.com/u/f62/19/84/12/04/12-fus10.jpg)  (http://https: //servimg.com/view/19841204/176)

The section of the underside that represents the lower bonnet with 4 exhaust is to cut (and keep it carefully to make a Type-5 or a T-10 from the 18 ICM)

 (https://i.servimg.com/u/f62/19/84/12/04/25_int10.jpg) (http://https: //servimg.com/view/19841204/192)

Then you have to find or build the cowling. I found in thethe spare box a cowling whose front had the right diameter and an acceptable profile. Given the beautiful green, I think it comes from a Matchbox, without further clarification. Then I cut a PC ribbon on which I marked the panels and  screws.

 (https://i.servimg.com/u/f62/19/84/12/04/13-cap10.jpg)  (http://https: //servimg.com/view/19841204/178)

The cowling of the type 4 arrives exactly where Amodel stops the fuselage So,  I had to extend it to avoid having a gap and also to be able to fix the cowling. I partially reproduced the front profile type 4 by gluing a tapered PC fairing on which I glued pieces of PC as spacers, the actual cowling being well separated from the fuselage. It is on these spacers that I fixed it. After a blank test, I centered and fixed the I-5 engine with its cowling. Then glued the upper and lower panels. Initially I thought of making a cowling in one piece, but to adjust the passage of the wings, it was easier to separate the panels, as in reality.

 (https://i.servimg.com/u/f62/19/84/12/04/14-cap11.jpg)  (http://https: //servimg.com/view/19841204/182)



[size=13] 5-Wing Specificities [/size]

Compared to Type 5, there are 4 ailerons hinges and  2 flare torches for landing  at the wing tip  like  on the TsKB-12. I use the plan  to mark the exact location of the horns and flashlights followed by a bit of scratch.
Extrados side, I removed the aileron command which  appeared on the following types

  (https://i.servimg.com/u/f62 /19/84/12/04/20-gui10.jpg) (http://https: //servimg.com/view/19841204/184)

 [size=13] 6- The landing gear [/size]

One of the important defects of the kit, Amodel designers did not understood the cinematic. They fixed the 2 struts  in the same plane while there is one in the plane of the main leg and the other spread to form a trihedron

(https://i.servimg.com/u/f62/19/84/12/04/17-tra11.jpg) (https://servimg.com/view/19841204/183)

New struts hace to be made . To compare , I show the ICM parts that are accurate.

  (https://i.servimg.com/u/f62/19/84/12 /04/18-tra10.jpg) (http://https: //servimg.com/view/19841204/181)

 I preferred to make  all these covers  with  0,25 PC cut with a Silhouette plotter.
With 4 Amodel to built, I have  16 covers to make, It is profitable to spend a little time drawing the templates. See the result in the PC 0.25. Much faster and more satisfying than cutting and thinning Amodel traps. I have enough  to make  types 5 and UTI.
 (https://i.servimg.com/u/f62/19/84/12/04/21-tra10.jpg) (http://https: //servimg.com/view/19841204/185)


I kept the Amodel main leg  after  thinning its cover  and created the cstruts  in stretched sprue . The rear strut had to slide between its out and in positions.
 (https://i.servimg.com/u/f62/19/84/12/04 /22_tra10.jpg) (http://https: //servimg.com/view/19841204/189)

 Amodel wheels are really rough. So I decided to use ICM wheels, well detailed and almost exact in diameter. I made a silicone mold for casting  the wheels for several type-5 coming.

 (https://i.servimg.com /u/f62/19/84/12/04/08_rou11.jpg) (https://servimg.com/view/19841204/228)

The original type 4 and  early 5 wheels were 750x100.  They grow  to 750x150 during the Spanish war, to facilitate use on poorly prepared grounds. ICM wheels represent this model. To get 750x100 wheels, I cut the wheels in two with a Tiger saw and  glued them. The kerf was enough to get the right section

 (https://i.servimg.com/u/f88/19/84/12/04 /rouest10.jpg) (http://https: //servimg.com/view/19841204/400)

 Here is the main finished

(https://i.servimg.com/u/f62/19/84/12/04/23-des10.jpg) (https://servimg.com/view/19841204/188)
(https://i.servimg.com/u/f62/19/84/12/04/24_des10.jpg) (https://servimg.com/view/19841204/187)

 I've complicated the end of the work a little bit. I realized that the  opening for  the connection between the elevators is welle visibel. I  cut these control surfaces to be able to pierce the fuselage and  I glued them "to dive "

[/url](https://i.servimg.com/u/f62/19/84/12/04/26_der10.jpg) (https://servimg.com/view/19841204/195)

Then,  port and starboard navigation lights

] (https://i.servimg.com/u/f62/19/84/12/04/27-feu10.jpg) (http://https: //servimg.com/view/19841204/191)

 And finally, 2 small bosses, probably protecting horns, at the rear cone that were present on the TsKB and type 4, canopy rails, venturi, machine guns and Pitot tube made with hypodermic needles. The canopy is the duplicate of the TsKB P & J kit. The OP-1 will be attached at the same time as the canopy after painting.

  (https://i.servimg.com/u/f62/19/84/12/04/28_fin10. jpg) (http://https: //servimg.com/view/19841204/194)

For decoration, there are not many photos of Type 4. The best is the first one built, the 3c that Xan represented.  Another very famous photo  shows a well damaged T-4 in a flying school , with a  white top vertical stabilizer  and  small star,
I chose a generic aspect. No pictures, but respect of the standards of the time. Black cowling, dark green topclose to  khaki, light blue underside, tactical code on the rudder. Xan's search gives a slightly lighter green than the AII z ​​and a blue near the RLM65.
I took the humbrol 86 as green. and the H65  as blue. The decals come from the I-5  use to get the M22 engine

Here is  the result.
(https://i88.servimg.com/u/f88/19/84/12/04/t4_fin15.jpg) (https://servimg.com/view/19841204/421)
(https://i.servimg.com/u/f88/19/84/12/04/t4_fin17.jpg) (https://servimg.com/view/19841204/423)

(https://i.servimg.com/u/f88/19/84/12/04/t4_fin21.jpg) (https://servimg.com/view/19841204/437)

(https://i.servimg.com/u/f88/19/84/12/04/t4_fin22.jpg) (https://servimg.com/view/19841204/439)

(https://i.servimg.com/u/f88/19/84/12/04/t4_fin23.jpg) (https://servimg.com/view/19841204/440)




Cheers
Bernard




Title: Re: Polikarpov donkeys family. Part 2 : I-16 type 4
Post by: Massimo Tessitori on October 31, 2018, 07:07:29 PM
Hi Bernard,
your description of the conversion work is very clear and benefits of a close comparison of different kits. I like your work conversion and correction work that allows to put together kits of different firms without the errors that each of them has made that would create an unpleasant contrast. Thank you for posting it.
I wonder if there is a way to use an I-5 without engine for some conversion work.
Regards
Massimo


Title: Re: Polikarpov donkeys family. Part 2 : I-16 type 4
Post by: BLG on November 01, 2018, 10:04:06 PM
Quote from: Massimo Tessitori
I wonder if there is a way to use an I-5 without engine for some conversion work.
Hi Massimo,
You may invent an unknown Polikarpov  biplane prototype with the  inline engine of an I-17 or make a diorama, with a crashed I-5  :D

More seriously, I paid this I-5  6,5 and got the engine , its fairing and the propeller,  less than the price of some resin engines. Furthermore , there are parts like the seat , dashboard or wheels which may be usefull to improve old fashion kits.

Regards
Bernard


Title: Re: Polikarpov donkeys family. Part 2 : I-16 type 4
Post by: Massimo Tessitori on November 03, 2018, 02:06:22 PM
Hi Bernard,
noce idea, but the engine of an I-17 would require the sacrifice of a kit. The idea of a diorama is always good to reuse a defective model, maybe the plane could be with nose and back down into the water, so none will note the absence of seats and inner parts.
I agree that kitbashing can be better than buying aftermarket pieces. The price was very good.
Regards
Massimo


Title: Re: Polikarpov donkeys family. Part 2 : I-16 type 4
Post by: BLG on November 03, 2018, 07:41:00 PM
Hi Massimo .
When I say in-line engine, it's to use one of my 50 years old Spit/Bf109/Yak...  from the scap box  to make the hypothetic I-17/I-5 .
I forgot to add one usage of the I-5, the decals. I wanted  red stars with black borders and circle and they are not in the Amodel box, but in the I-5.

Regards
Bernard