{"id":6526,"date":"2019-07-26T08:54:42","date_gmt":"2019-07-26T10:54:42","guid":{"rendered":"http:\/\/www.w-143.com\/?page_id=6526"},"modified":"2023-04-07T16:45:03","modified_gmt":"2023-04-07T19:45:03","slug":"mercedes-benz-w25-prototyp-spark","status":"publish","type":"page","link":"https:\/\/www.w-143.com\/index.php\/mercedes-benz-w25-prototyp-spark\/","title":{"rendered":"Mercedes-Benz W25 Prototyp – Spark"},"content":{"rendered":"\n
\"W25<\/figure>\n\n\n\n
1934 Mercedes-Benz W25 Prototyp<\/strong>\nSpark - SP1039 (resin) <\/pre>\n\n\n\n
Published 07\/26\/19<\/p>\n\n\n\n
Up until the early 1930\u2019s, Mercedes-Benz racing warhorse was the SSK<\/a>. It was quite successful on tracks, but times were changing. For 1934, the Association Internationale des Automobile Clubs Reconnus<\/em> (AIACR) introduced the \u201c750 kg Formula\u201d. This new formula for Grand Prix racing determined cars with a maximum dry-weight of just 750 kg. Also, the minimum race length would be 500 km. Since the SSK weighed considerably more than 750 kg, so Mercedes needed something totally new. This new car would be the W25<\/a><\/strong>. Project chief was Hans Nibe, with Max Wagner responsible for the chassis. The chassis was of a traditional box section type, with  cross-bracing. To make things lighter, it was extensively drilled. Covering the chassis was a streamlined body work of hand-beaten aluminum alloy painted in white.<\/p>\n\n\n\n
\"W25
From prototype to race car a lot changed, including the external clutch.<\/figcaption><\/figure>\n\n\n\n
The engine was the responsibility of Albert Heess and Otto Schilling. The new engine, called M25<\/a>, was a traditional affair. It was an inline-8 with forged steel cylinders in 2\u00d74-cylinder blocks with welded on water jackets. With DOHC and a Roots supercharger, initially (M25A) it had a displacement of 3360 cm\u00b3, producing 302 hp. Later on it was enlarged, with the last version (M25C) having 4310 cm\u00b3 and producing 402 hp. The supercharger pushed air into two carburetors, with a relief valve to vent out the surplus pressure. When the driver lifted the gas that created the famous high pitched Mercedes-Benz scream. A groundbreaking aluminum gearbox transmitted power to the road, placed in unit with the rear axle. The suspension was all-independent and hydraulically-assisted drum brakes provided stopping power.<\/p>\n\n\n\n
\"W25
Almost doesn’t look like a Silberpfeile.<\/figcaption><\/figure>\n\n\n\n
Work on the W25 Prototyp<\/strong> started in March 1933 and the new car was ready for testing in February 1934. After initial shakedown Mercedes took the W25 Prototyp to Monza for track testing, but Manfred Von Brauchitsch had a tire failure and crashed. Then in April another pilot crashed the second car at N\u00fcrburgring after having problems with the differential. Despite the rocky start, the car was ready for the IV Internationalles AVUSrennen<\/em> on May 27th. However, after having serious problems with the carburetors, Mercedes withdrew their three cars right after practice. With that, the W25 officially debuted on race tracks in early June, at the VIII ADAC Eifelrennen<\/em>, at N\u00fcrburgring. The team had three cars in the race, and Von Brauchitsch\u2019s #20 finished in first place. In late 1934 Mercedes even developed a LSR version of the car, the unique Rennlimousine<\/a>.<\/p>\n\n\n\n
\"\"\/
The very first of Mercedes’ Silver Arrows.<\/figcaption><\/figure>\n\n\n\n
Being the W25 Prototyp, it’s the very first Silberpfeil from Mercedes-Benz. Ironically, it\u2019s NOT silver, but white, since Mercedes only officially adopted silver after N\u00fcrburgring in June. The story that Alfred Neubauer<\/a> had the white cars stripped of the white paint to save weight is just legend. According to Neubauer\u2019s autobiography, the term Silberpfeil came up after the W25 raced in silver that day. But the fact is that the term showed up in the specialized press years before. And more importantly, the N\u00fcrburgring race was actually a Formula Libre<\/em> race, so the cars were not <\/strong>limited to 750 kg. <\/p>\n\n\n\n
\"W25
Six years between the W25 and the W154 –  a LOT changed.<\/figcaption><\/figure>\n\n\n\n
Even if Neubauer wasn\u2019t 100% correct in his memoir, the model is 100% awesome. It\u2019s Spark at its finest, and a treat to a Silberpfeil nut like me.  I think it’s a new release from Spark, and being a Silberpfeil, not something for everybody.  Since it\u2019s not exactly plentiful, if you find one, jump on it. I have the feeling that this one will be rare in the future.<\/p>\n","protected":false},"excerpt":{"rendered":"
1934 Mercedes-Benz W25 Prototyp Spark – SP1039 (resin) Published 07\/26\/19 Up until the early 1930\u2019s, Mercedes-Benz racing warhorse was the SSK. It was quite successful on tracks, but times were changing. For 1934, the Association Internationale des Automobile Clubs Reconnus (AIACR) introduced the \u201c750 kg Formula\u201d. This new formula for Grand Prix racing determined cars … Continue reading “Mercedes-Benz W25 Prototyp – Spark”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-6526","page","type-page","status-publish","hentry"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/pages\/6526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/comments?post=6526"}],"version-history":[{"count":24,"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/pages\/6526\/revisions"}],"predecessor-version":[{"id":15582,"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/pages\/6526\/revisions\/15582"}],"wp:attachment":[{"href":"https:\/\/www.w-143.com\/index.php\/wp-json\/wp\/v2\/media?parent=6526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}