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O.S. Speed B21 Ty Tessmann II Limited Edition

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The O.S. Speed B21 Ty Tessmann II Limited Edition engine is a power plant worthy of Ty's winning pedigree. Unique features include a low-profile cylinder head designed by Ty, a 5.8 mm carb reducer and laser-etched engravings of Ty's signature on the crankshaft, cylinder head and crankcase. So whether you are a fan of Ty, or just a fan of O.S., this engine is available for a limited time only, so get one before they are gone!

  • Special low-profile cylinder head with double-height vertical fins, designed by Ty Tessmann
  • Crankshaft cylinder head and crankcase feature a laser-etched engraving of Ty Tessmann's signature
  • 5.8 mm carb reducer
  • 21J3 (B) slide valve carburetor
  • P3 Turbo glow plug
  • Exhaust seal ring
  • Dust cap set
0.65 in (16.4 mm)    
Crankshaft Threads: UNF 1/4-28    
Cylinders: Single    
Displacement: 0.211 cu in (3.49 cc)    
HP: 2.61 hp @ 34,000 rpm    
Height: 3.32 in (84.3 mm)    
Length: 3.70 in (94 mm)    
Plug Type: P3 Turbo Glow Plug    
RPM Range: 4,000 - 42,000 rpm    
Recommended Fuel: 10-30% nitro content    
Stroke: 0.65 in (16.4 mm)    
Total Weight: 12.6 oz (356 g)    
Width: 1.77 in (45 mm)

This product was added to our catalog on September 26, 2018

Sunday, Jul 21 2019 (6 months ago)
O.S. Speed B21 Ty Tessmann II Limited Edition
The best, most linear buggy engine on the market. Not the most insanely powerful but by far the most controllable. More linear than the Drake engine. So smooth and controllable.