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Puzzles, Games and Name That Car => Solved AutoPuzzles => 2021 => Topic started by: sichel on July 19, 2021, 03:34:39 PM

Title: SOLVED: si_036 - Adler RS 250 wc - 1955
Post by: sichel on July 19, 2021, 03:34:39 PM
What a pretty little racer! Which manufacturer? Which engine? Which year of construction?
Title: Re: si_035
Post by: sichel on July 27, 2021, 02:38:24 PM
Experts can identify this beauty?
Title: Re: si_036
Post by: sichel on August 03, 2021, 05:20:02 AM
Or do the professionals?
Title: Re: si_036
Post by: fromwien on August 03, 2021, 06:27:31 AM
German 2-stroke?
Title: Re: si_036
Post by: sichel on August 03, 2021, 06:52:12 AM
Yes!
Title: Re: si_036
Post by: fromwien on August 03, 2021, 10:32:12 AM
Three-cylinder DKW?
Title: Re: si_036
Post by: sichel on August 03, 2021, 11:36:25 AM
No, sorry.
Title: Re: si_036
Post by: fromwien on August 03, 2021, 05:23:49 PM
Then NSU? (bad eyes..thought to see one lying cylinder between two upright ones..)
Title: Re: si_036
Post by: sichel on August 04, 2021, 04:17:50 AM
Do you wear glasses?  ;)  As far as I know, NSU never built 2-stroke-racers.
Title: Re: si_036
Post by: fromwien on August 04, 2021, 05:07:35 AM
Yes, you are right! I wear glasses, but have to put them on..
And again you are right: Stupidly I did forget to have a look at your previously answer..
Two more goals for you.. and I hope one for me:

MZ connection?
Title: Re: si_036
Post by: sichel on August 04, 2021, 07:33:59 AM
Sorry, I have to correct my statement on NSU racers:
In 1951 there was a short intermezzo with Lambretta 2-stroke scooters, converted for racing. One of the attemts for a new start in racing. First race in Dieburg was the first and only victory. Third race in Ingolstadt was a total failure and they withdrew the racing Lambretta.
Btw.: Winner in Ingolstadt was a certain Werner Haas on a self-tuned double-piston Puch...
Actually, I wanted to take pictures of the little racer, but maybe I can use them again...

But now back to the current puzzle: There is no MZ connection, except perhaps mutual theft with eyes...
Title: Re: si_036
Post by: fromwien on August 04, 2021, 04:42:42 PM
Thanks for information about the NSU-2-stroke-racers. Didn't know about.

Is this an Adler racer?
Title: Re: si_036
Post by: sichel on August 04, 2021, 04:55:17 PM
Yes, it is! Locked for you, waiting for more details.
Title: Re: si_036
Post by: fromwien on August 04, 2021, 05:08:00 PM
250 RS 1956 (thermosiphon watercooled with two small radiators air feeded by the small round holes In the front fairing)?
Title: Re: si_036
Post by: sichel on August 04, 2021, 06:09:09 PM
Adler RS 250 watercooled is nearly a bull's eye! But I have an earlier year of construction, the fairing makes the difference. Can you describe the difference?
Title: Re: si_036
Post by: fromwien on August 05, 2021, 02:42:47 AM
It's the "Delphinverkleidung" ("dolphin-fairing") prior the "Vollverkleidung" ("full-enclosure-bodywork"), 1955
Title: Re: si_036
Post by: fromwien on August 05, 2021, 03:13:59 AM
Here in comparison the difference shown on another example (NSU)
Title: Re: si_036
Post by: sichel on August 05, 2021, 03:57:47 PM
This is your next goal! A great piece of work. Yes, it is the 1955-version: watercooled with dolphin-fairing and duplex front-brake. Thanks for the comparison using the example of NSU Max. I particularly liked this: My first vehicle was a NSU Max and my best friend started at the same time with a Adler M 250. I'll show you the '55-model as a naked bike and a version from the beginning of 1956 with full fairing. I did not found any picture of this version in racing. In the late 50s, full fairing was banned, the motorbikes became very sensitive to side winds as a result.

 
Title: Re: SOLVED: si_036 - Adler RS 250 wc - 1955
Post by: fromwien on August 06, 2021, 01:34:39 PM
Thanks for this very interesting puzzle! Never before, I saw a picture of the Adler 250 RS with "dolphin-fairing"!
The air-cooled version of the Adler 250RS-engine served as a base for Yamaha's later very successful 250-race-engines
Title: Re: SOLVED: si_036 - Adler RS 250 wc - 1955
Post by: sichel on August 07, 2021, 05:13:25 AM
Yes, it was fun to follow the development of the solution. The first series-produced Japanese two-stroke twins (Suzuki, Yamaha) have looked very, very similar to the Adler engines.
Title: Re: SOLVED: si_036 - Adler RS 250 wc - 1955
Post by: sichel on November 13, 2021, 06:52:31 PM
A look behind the scenes.
Title: Re: SOLVED: si_036 - Adler RS 250 wc - 1955
Post by: fromwien on November 14, 2021, 03:51:34 AM
 :thumbsup: