Ratios, HP, Torque & Losses

From FORM: SynchroLite ~ Power Train

For Assembly Item 0008, 1316, and Perhaps 1116

 

Speed:

 

Power:

 

Torque:

 

 

Ratio:

 

Loss:

 

 

 

Engine:

4000 (3)

rpm

67.0

hp

88 (4)

ft-lb

V-belt:

2.2

: 1

4

%

 

 

Intermediate:

1818

rpm

64.3

hp

186

ft-lb

Spiral Bevel:

3.0

: 1

0.75

%

 

 

Rotor:

606 (1)

rpm

63.8 (2)

hp

553 (2)

ft-lb

Total:

6.6

: 1

4.72 (2)

%

 

 

For Assembly Item 1319:

 

Speed:

 

Power:

 

Torque:

 

 

Ratio:

 

Loss:

 

 

 

Engine:

4000 (3)

rpm

67.0

hp

88 (4)

ft-lb

Spiral Bevel:

2.5

: 1

0.75

%

 

 

Intermediate:

1600

rpm

65.5

hp

218

ft-lb

Spiral Bevel:

2.64

: 1

0.75

%

 

 

Rotor:

606 (1)

rpm

66.0 (2)

hp

572 (2)

ft-lb

Total:

6.6

: 1

1.49 (2)

%

 

 

    1. This is the speed for 3-blade 8 ft radius rotors.
    2. The horsepower and torque at each rotor hub will be 1/2 the totals shown above.
    3. Maximum torque is at 4500 RPM
    4. The Hirth 7301 engine shows the torque as 85 lb-ft at 4,000 RPM

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Last Revised: May 10, 2008