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Welcome to the forum, Bootch
1. Tenzan had 3 fuel tanks per wing plus one spare tank in the nose (B6N1: 65L for 95 octane fuel/B6N2: 85L for water-methanol).
2. The lowest two exhaust pipes on the port side were combine to one though I wonder why. Image attached.
3. I don't know why the navigator-bombardier control panel design is different for the same B6N2.
4. I wonder if the navigator viewfinder means Drift Indicator (Type 97 Mark 1). That was a standard equipment.
5. The trailed radio antenna was a wire which had a weight on the end. Wire length unknown. Image attached.
thanks for the translation and explanation, but why in the photo is missing the third switch?
You are welcome, Bootch.
Data for the B6N are generally not so many but the Maru Mechanic describes the Drift Indicater was usually equipped on the starboard side of the navigator seat, together with 6 flash balls for the night operation. A set of binoculars was also one of the standard equipments. There was a flight chart on the retractable table.
I'll be looking forward to your nice job in the future
I have no reason to doubt your words. However, now it is necessary to solve two "easy task"
1. Determine the correct structure of the navigator control panel.
2. Find a place for viewing window.
The sighting window was originally a sheet of glass in early version of the B6N2. That would have been replaced later with a metal panel for the security reason. I think the Smithsonian collection which Mr. Mikesh referred is showing the early version and photos in the Maru Mechanic does the later one. Matter would be which version you choose.
Some more questions about Tenzan.
1. What is the function of this part?
2. I do not know the location of the radar equipment (transmitter, receiver and related equipment). I would like to look into this matter.
Unfortunately this vertical tube is much easier. This vertical tube - a support strut for the navigator's seat...Photos and diagrams of the support strut.