Japanese Mitsubishi G4M Betty Bomber APU (generator) Engine

Zzeke

Recruit
4
6
Sep 11, 2022
Hello everyone, I am new here. This is my first post. A few years ago a friend gave me an APU engine which his grandfather brought back from Japan when the war ended. He told me that this engine came out of a Betty bomber, and that it used to drive a generator on the airplane. Although I have not had it running, he told me that his grandfather used to run it from time to time. I don’t know much about it other than it turns over freely and has compression. I don’t dare attempt to start it, because I don’t want to risk damaging it. There is a nameplate on it, but it is in Japanese and I cannot read it. I am wondering if anyone might have any information about this engine. I am going to try to include some photos with this post. If I have posted this in the wrong place, please accept my apologies and move the post to where it belongs. Thank you in advance for any information.
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Shinpachi

Major
10,231
7,699
Feb 17, 2008
Osaka
Interesting pics.

充電用發動機空?型 Engine for battery charging
馬力  燃?? Horse power with fuel...
回轉数 3500 RPM 3500
重量(發電機ヲ含ム)??? Weight (includes generator)
製造番號 1002 Serial number 1002 ㋣(* inspection seal of naval Tokyo district)
昭和 20 年 2 月製作 Produced in February, 1945
正田飛行機製作所 Shoda Aircraft Mfg. Co.

A larger photo will be helpful to read details.

3EF9B644-FBA9-4AD9-A885-F9F035903248R.jpg
 

Shinpachi

Major
10,231
7,699
Feb 17, 2008
Osaka
Thank you for the information! I will post a better photo of the nameplate. View attachment 692082
:thumbleft:

充電用發動機空特型 :
Engine for battery charging, Type Ku-toku (= Air-special)

馬力 2.6 燃費 瓦/時/馬 5.52 :
2.6hp with fuel consumption gram/hour/hp 5.52

回轉数 3500 : 3500 rpm

重量(發電機ヲ除ク)28.5KG *Anchor-mark :
Weight (excludes generator) 28.5KG *Inspection seal of IJN

*S-mark 製造番號 1002 *㋣-mark :
*Shoda's inspection seal Serial number 1002 *To-mark = inspection seal of naval Tokyo district

昭和 20 年 2 月製作 : Produced in February, 1945

正田飛行機製作所 Shoda Aircraft Mfg. Co.
 

Zzeke

Recruit
4
6
Sep 11, 2022
Thank you so much for the translations. I think I am going to attempt to sell this APU engine. Does anyone have any contact information as to who I might contact in regards to selling this engine? I don’t know if there are any groups that are currently restoring a Betty Bomber that might be interested, or if there are any museums that might be interested. Maybe a private collector? Any leads would be appreciated. Thank you in advance.
 

mjfur

Senior Airman
364
331
Sep 23, 2006

Zzeke

Recruit
4
6
Sep 11, 2022
mjfur, thank you for suggesting this museum as a possible contact. I explored their website, and unfortunately there is no contact email address provided.
 

Shinpachi

Major
10,231
7,699
Feb 17, 2008
Osaka
mjfur, thank you for suggesting this museum as a possible contact. I explored their website, and unfortunately there is no contact email address provided.

The owner's lifestyle is classical.
The best and sincere way is to write and send letter with printed pictures to the following address -

〒401-0320 山梨県南都留郡鳴沢村富士桜高原内
河口湖自動車博物館・飛行館
原田館長殿

401-0320
Fujizakura-kogen, Narusawa-mura, Minami-tsuru-gun, Yamanashi Prefecture, Japan
Director - Mr. Harada
Kawaguchiko Motor Museum / Air Museum

Or by fax to -

0555-86-3511
 

RichardSuhkoi

Airman
59
38
Apr 27, 2021
What a beautiful artifact!
Certainly do not run it , I doubt more than a handful exist.
I suspect it burns 5 kg per hour per hour not 5 grams.
I hope it finds a good home.
 

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