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Well, when Knightflyer started looking at engines, he was still thinking about itty-bitty two-place aircraft (see Airframes page for his current thoughts on the subject). Give him some time, and he'll endeavor to create a list like the one that follows for larger engines too, if the feed-back on this one is positive.

This table is sorted by the dollars per horsepower ($ per HP) column. The Stratus Subaru conversion has the lowest cost per HP of the engines in this comparison. Of course, there are other factors as well. For instance, while not the least expensive, the A650-1 rotary engine conversion has a very low weight. It should be noted, however, that most of the liquid cooled engines are listed sans radiator, and they all are "dry", with no oil. While oil pretty much cancels out, the radiator and coolent can easily add 20 to 25 pounds additional weight. Also, while the listed engines all included a PSRU (prop speed reduction unit) if needed, and that was supposed to be in the listed weight, errors do occur. Double check!

An engine that I haven't added to the table below yet, but that looks very promising, is the Verner SVS-1400. The company selling it (Gyro, Inc.) claims 80hp@5000rpm. They also list an all-up weight of 165 pounds. Not bad! The price isn't bad either - $7,250!

Deltahawk is a new kid on the block, who are developing a diesel engine. It is a V-4 of 200HP, with a planned V-8. They currently have the engine installed in a Velocity for testing, but as of this writing, it had not been used for airborn tests, only ground runs. Here is a link to their site: Deltahawk

Supplier

Engine

HP @ RPM

Torque @ RPM

Weight(dry) Lbs.

HP per Lb

$ per HP

Cooling

Price

Stratus Inc.

EA81

100@5400

102@3800

185

.54

$64.95

liquid

$6,495.

Revmaster Aviation 760-244-3074

2100-D

72@3200

128@2600

185

.39

$74.31

air

$5,350.

Firewall Forward Aero Engines

CAM 100

103@6000

89@6000

225

.46

$77.18

liquid

$7,950.

Alturair

A650-1

100@6000

78@6000

100

1.00

$80.00

liquid

$8,000.

Aero Performance Products 909-929-3733 aero@net-quest.com

Aero 85

85@4500

110@3000

95

.89

$80.82

air

$6,870.

Aero 114T

114@4500

145@3100

110

1.04

$88.33

air

$10,070.

Sadler Radial Engines 360-678-6994

Sadler R1765U

65@3000

113@3000

108

.60

$106.78

air

$6,941.

Tiger Aviation tremfl@aol.com

Jabiru 3200

120@3300

125@3000

150

.80

$107.50

air

$12,900.

Jabiru 2200

80@3300

125@3000

123

.65

$111.88

air

$8,950.

Leading Edge Airfoils Inc. 719-663-5323 (various others also)

Rotax 912

80@5800

76@6500

137

.58

$112.44

liquid/air

$8,995

Leroy Enterprises, Inc.

JPX-4TX75/A

85@3000

147@3200

149

.58

$117.47

air

$9,985

JPX-4TX90

90@3000

?

149

.60

not available

air

not available