CHRISTMAS IN JULY SALE

Save Up To $250!

40TH ANNIVERSARY BLOG

Celebrating 40 years of Horizon Hobby!

CLEARANCE SALE

Save Big While Supplies Last

CHRISTMAS IN JULY SALE

Save Up To $250!

40TH ANNIVERSARY BLOG

Celebrating 40 years of Horizon Hobby!

CLEARANCE SALE

Save Big While Supplies Last

Next Shipment November 2025

55HZ-H Hyper Ringed .55 Helicopter Engine

OS Engines - OSMG1955

$418.63

RC Club points earned on this item shown at checkout.

55HZ-H Hyper Ringed .55 Helicopter Engine Product Specs

  • Bore0.91 in (23 mm)
  • Crankshaft ThreadsUNF1/4-28
  • Crankshaft TypeThreaded
  • CylindersSingle
  • Displacement0.55 cu in (8.93 cc)
  • Power TypeGlow
  • Product Height3.6 in (90.9 mm)
  • Product Length3.0" (76.6mm) from backplate to front bearing
  • Product Width2.0 in (52 mm) at mounting tabs
  • RPM Range2,000 - 17,000 rpm
  • Stroke0.85 in (23.5 mm)
  • Total Weight14.40 oz (408 g)