|
VT
.49 SPECIFICATIONS
|
Displacement |
.49
cu.in (8ccm)
|
Bore
x Stroke |
0.898
x 0.772
|
Power |
.75
hp
|
RPM
Range |
2500
~ 13,000
|
Weight |
17.3
oz
|
Prop
Size |
10x6
11x5 12x4
|
Prop
Nut Thread |
1/4"
x28
|
|
VT
.49 SPECIFICATIONS
|
Piston/Cyl
Type |
Conventional
Ringed ABC
|
Crankshaft
|
Hardened
supported by two ball bearings
|
Valve
Type |
Hard
Chrome Rotary in bronze sleeve
|
Valve
Train Drive |
Bevel
and spur gear via shaft
|
Carburetor
Type
|
Twin
Needle
|
Glow Plug |
K&B
1L 7311 Std Long
|
See
note a bottom of page about glow plugs in
VT engines |
|
ULTRA
QUIET!
HP's unique design of four strokes are the
quietest made. In fact, the VT 21 rivals an electric.
Both engines are equipped with suburb mufflers
that easily meet all DB requirements. |
EXACTING
TOLERANCES!
HP
engines have always been renowned for their unsurpassed
quality and precision. This tradition continues
as all HP four cycles are produced with the latest
computer controlled machines in our Southern California
facility. |
SUPER
SMOOTH
!HP has always been known as the smooth runners.
The one piece hardened steel crankshaft with a
massive counter weight is supported by 2 ball
bearings. A light alloy forged conrod and cast
piston are balanced perfectly. You'll be surprised
just how smooth a engine can be. |
OVERHEAD
BBC rotary valve technology
Bronze, Brass, Chrome. HP pioneered rotary valves
in model engines and utilize a true hard chrome
valve running in a bronze sleeve. This arrangement
never requires adjustment. No valve float and
or power robbing valve spring tension to overcome. |
Optional
roller bearing supported valve Rather than
the standard bushing, you can purchase the bearing
head version to take the upward force of the valve
during combustion. Both engines provide the same
power, however the bearing head is less critical
on the oil scavenging from the exhaust. |
Precision
Crankshaft
Produced from solid bar stock with large counterbalance
and then fully heat treated, these crankshafts
are then precision ground to a tolerance of .0001
of an inch. This is why HP engines are known as
the smoothest runners. |
ABC
ringed piston & cylinder assembly
A high silicon piston fitted with ring runs
in a hard chrome plated brass sleeve precision
ground to .0001 of an inch on both the inside
and outside diameters.
|
Forged
& bushed connecting rods
Each VT connecting rod is forged from high strength
aircraft grade aluminum alloy then precision machined
and fitted with bronze bushings at both ends |
High
pressure castings
All HP engines are pressure die cast from aluminum
alloys. These castings are made by forcing molten
aluminum into high strength tool steel dies at
pressures as high as 3000 psi. |
Ball
Bearings
All VT's are equipped with double ball bearings
on the crankshaft. The front is sealed on both
sides eliminating blow by and rusting that is
common in four cycle engines. |
|
Click
image for
larger image
with dimensions |
|