HB .61 & .61 PDP with muffler


Price & Availability

The HB .61 is a renowned engine for durability and performance. It was used by the US Army to power target drones in the 1980's. Its light weight and high power make it a favorite for many modelers. The patented PDP ports boost the power without increasing fuel consumption. These 4 finger ports are located on the exhaust side of the baffle and introduce an additional fuel charge in a normally dead area of a loop scavenged engine design.
SPECIFICATIONS
HB .61
HB .61 PDP
HP *
1.45 @ 16,000 RPM
1.85 @ 16,000 RPM
Practical RPM *
1800 ~ 16,000
1800 ~ 19,000
Porting Arrangement
Loop Scavenged
Loop Scavenged with PDP ports
Displacement
.61 cu. in. (9.97 ccm)
Bore & Stroke
0.944" x 0.866"
Prop Shaft Thread
1/4 x 28
Piston/cylinder type
Dykes ring piston / hardened steel liner
Connecting Rod
Forged Aluminum bushed at both ends
Crankshaft
One piece hardened Steel
Engine Weight
14.6 oz. (413 gr.)
Muffler Weight
Bearings
Double Ball Bearing supported crankshaft
Carburetor
O-ring sealed twin needle with full fuel metering, composite body.
Carburetor neck Dia
.510" Dia
Carburetor Throat
*Specification's subject to change depending on fuel, prop, exhaust system, etc.

©2007-1998 Model Engine Corporation of America, All rights reserved.
HB is a Trademark of Model Engine Corp. of America

No part may be reproduced without written permission from
MECOA -- P.O. Box 98 -- Sierra Madre, CA 91025 U.S.A.