20/2/18 [1.75.0.194] Ki-49 wrong flap

[tester188@psn 1,413]

1. The full name of the vehicle affected. If the problem is isolated to one difficulty setting (e.g. Simulator), specify which.

• Ki-49-I
• Ki-49-IIa
• Ki-49-IIb
• Ki-49-IIb/Late

 

2. A detailed description of the issue you have or what you see as being erroneous regarding its representation in-game.

All models of Ki-49 have wrong flaps.

In historical fact, Nakajima Ki-49 Army Type 100 Heavy Bomber had Fowler flaps.

However, in the game, Ki-49 has a split flap.

(From source historical document 2.)

 

3. Unless the data is taken from an official Gaijin statement, please provide a documented test and provide the Client Log from that session.

I observed flaps with a test flight to confirm this problem.

Spoiler

Ki-49-I

Spoiler

 

 

 

Ki-49-IIa

Spoiler

 

 

 

Ki-49-IIb

Spoiler

 

 

 

Ki-49-IIb/Late

Spoiler

 

 

 

 

Client Log

2018_02_20_12_59_34__10172.clog

 

4. A detailed description of the fix you suggest. Provide sources including reference that underline your position. 

I will suggest that you change the flap of Ki-49 to Fowler flap.

 

Sources

User Manual:

Spoiler

 

Quote

主翼面積

Wing area

 

補助翼共: 約　六九・〇五平方米

Wing area with ailerons: approximately 69.05 m²

 

下げ翼二〇度下げ状態: 約　七三平方米

Flap 20° down state: approximately 73.00 m²

 

下げ翼面積:　約　四・三四六五×二平方米

Flap area: approximately 4.3465 x 2 m²

 

Quote

Translation:

The flap is equipped with "Fowler" flaps to prevent wing area expansion, effective angle of attack increase, speed range expansion, swirl wake on the back of the flap during takeoff and landing.

Its structure is a stress sheath structure made of No. 4 aluminum alloy and has arm brackets at five places.
There are two rollers on the arm fitting, fitting in the rail on the main wing side, guide the movement of the flap and absorb the twist due to wind pressure.

Attach the control cable to the first and fourth arm brackets and operate the flaps accordingly.
In order to minimize loosening of the cable during operation, guide brackets are installed on the arm brackets.

 

The movable angle of the flap is 35°.

 

The flap mounting angle is (-) 4.6° with respect to the fuselage reference line on its lower surface. 
When the flap operation starts, the flap moves to the rear, first opens to (+) 20°, then moves backward while keeping (+) 20°, and finally opens to (+) 35°. 
The flap indicator indicates 20° and 30° respectively with white light at the last (+) 20° and (+) 35° position. 
The lighting period is 5% before and after the indicated angle.

 

 

 Original:

下げ翼ハ離着陸ニ際シ翼面積ヲ増大スルト共ニ有効迎角ヲ増加シ速度範囲ヲ大ナラシメ且下ゲ翼背面ノ渦流ノ発生防止ノ爲「ファウラー」下げ翼ヲ使用ス

其の構造ハ應力外板式ニシテ四號「アルミニウム」合金板ヨリ成リ五箇所ニ腕金具ヲ有ス

各腕金具ニハ二箇所ノころアリテ主翼側ノ軌条ニ嵌込ミ下げ翼ノ移動ヲ案内シ且風壓ニ依ル捻レヲ吸収ス

第一番及第四番腕金具ニ操作索ヲ取付ケ之ニ依リ下げ翼ヲ操作ス

操作時ニ於ケル索ノ緩ミヲ最小限ナラシムル爲腕金具ニハ案内金具ヲ設ク

 

下げ翼ノ可動角ハ三十五度トス

 

下げ翼取付角ハ其ノ下面ニ於テ胴體基準線ニ對シ（－）四・六度ナリ
下げ翼操作ヲ開始セバ下げ翼ハ後方ニ移動シツツ先ヅ（＋）二十度ニ開キ爾後（＋）二十度ノ儘後方ニ移動シタル後（＋）三十五度ニ開ク
下げ翼指示器ハ最後ノ（＋）二十度及（＋）三十五度ノ位置ニ於テ白燈ニ夫々二十度及三十五度ヲ指示ス
点燈時間ハ指示角度ノ前後五％トス

 

 

Quote

Translation:

At takeoff, please use the flap approximately at an angle of approximately 20°. (Position where the white light indicates the display of 20°.)

If the flight weight is less than about 8500 kg, you do not have to use the flap.
However, please be aware that the takeoff distance will be longer.

 

Please do landing gear "up" promptly after takeoff, "close" the flap after the gear up is over.
In this case, setting the flap to "close" at a stroke will cause the descent of the airplane, so intermittently operate the flap and gradually "close".

 

Please use the flap at 35° of opening when landing.

 

 

Original:

離陸時ニハ下げ翼ヲ概ネ二十度開度シ使用スベシ（白燈ニ二十度ノ標示點燈シタル位置）
但シ飛行重量約八千五百瓩以下ナル場合ハ下げ翼ヲ使用セザルモ差支ヘナシ
但シ離陸距離延長スルコトヲ考慮スベシ

 

脚ハ離陸後成ルベク速ヤカニ「上ゲ」操作ヲ爲シ足上ゲ修了後下げ翼ヲ「閉」ニス

此ノ際下げ翼ヲ一氣ニ「閉」ニスルコトハ機體ノ沈下ヲ増大スルヲ以テ斷續的ニ操作シ徐々ニ「閉」ト爲ス

 

着陸ニハ下げ翼ヲ三十五度開度シ使用スベシ

 

 

 

 

 

 

Manual for operating Type 100, heavy bomber  (一〇〇式重爆撃機説明書). Army Air headquarters (陸軍航空本部). August 1941. Frame Number 12, 16, 34, 45, 91-96.

http://dl.ndl.go.jp/info:ndljp/pid/8815751?itemId=info%3Andljp%2Fpid%2F8815751&__lang=en

 

 

Historical documents 1:

Spoiler

 

Figure 77. Characteristics of Operational Japanese Aircraft.

WAR DEPARTMENT TECHNICAL MANUAL TM-E 30-480. HANDBOOK ON JAPANESE MILITARY FORCES WAR DEPARTMENT • 1 OCTOBER 1944.

https://www.ibiblio.org/hyperwar/Japan/IJA/HB/HB-4.html#V

 

 

Newsreel:

Spoiler

 

 

 

Takachiho Airborne Unit, Japan News No. 238 (日本ニュース 第238号 高千穂降下部隊). Japan Film Company (社団法人日本映画社). December 1944. Play time 4:33-4:38 (Ki-49 takeoff scene).

https://www2.nhk.or.jp/archives/shogenarchives/jpnews/movie.cgi?das_id=D0001300366_00000&seg_number=001

 

 

Wreck:

Spoiler

Madang, Papua New Guinea. ‎October 2002.
Editor for Asisbiz: Matthew Laird Acred

http://www.asisbiz.com/PNG/Nakajima-Ki-49-Hellen.html

 

 

Madang, Papua New Guinea. April 2010.
April 2010 Papua New Guinea Travel
https://4travel.jp/travelogue/10470454

 

 

Historical documents 2: 

Spoiler

 

 

OPNAV-16-V No. T402, February 1945, TAIC handbook No. 1, general information section. Report No. 9-a(17), USSBS Index Section 6. Page 17.

http://dl.ndl.go.jp/info:ndljp/pid/4009730/11?itemId=info%3Andljp%2Fpid%2F4009730&contentNo=11&__lang=en

[Rapitor 10,702]

Thank you for your report,

 

I'll investigate.

 

Regards

[Rapitor 10,702]

Your Bug Report is submitted.

 

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Sincerely,

Rapitor, for the ™ team