MDS Helicopter Engines
These engines are made in Russia. MDS engines tend to have quite a high compression so give it a try with 5% or less nitro .
Engine Specification Chart:
.18 | .28 | .38 | .40 | .58 | .68 | .78 | 1.48 | 2.18 | |
Bore | 16.0 mm | 19.0 mm | 20.3 mm | 21.0 mm | 23.6 mm | 25.4 mm | 26.2 mm | 32.5 mm | 36.5 mm |
Stroke | 14.0 mm | 16.0 mm | 18.4 mm | 18.7 mm | 22.0 mm | 22.0 mm | 24.3 mm | 29.7 mm | 34.55 mm |
Displacement | .18cu in | .28 cu in | .37 cu in | .39 cu in | .59 cu in | .68 cu in | .78 cu in | 1.48cu in | 2.18 cu in |
Output | 0.52 hp | 0.86 hp | 1.20 hp | 1.30 hp | 1.72 hp | 2.21 hp | 2.40 hp | 3.7 hp | 4.8 hp |
Engine Wt. | 6.08 oz | 9.60 oz | 10.56 oz | 12.8 oz | 14.08 oz | 18.24 oz | 19.6 oz | 29.5 oz | 48.32 oz |
Muffler Wt. | 1.69 oz | 3.2 oz | 4.8 oz | 5.12 oz | 5.4 oz | 6.4 oz | 6.4 oz | n/a | n/a |
RPM Range | 2.5 - 22k | 2.5 - 20k | 2.5 - 18.5k | 2 - 17k | 2.5 - 18k | 2.5 - 18k | 2.5 - 13k | 2.5 - 10k | 2-8.9k |
Crankshaft | 10-32 | 1/4 x 28 | 1/4 x 28 | 1/4 x 28 | 1/4 x 28 | 5/16x24 | 5/16x24 | 5/16x24 | 10x1 mm |
MDS engines - Instructions with parts listings for the 2003 range from 18 to 218 sizes including 38/48/68 Helicopter variants.