Item 1320
DESIGN:
SynchroLite ~ Power Train (for 2 engines) - Reduction Primary - for Assembly 1319 (11)Overview:
The following calculations are for Assembly
1319.The engine is mounted longitudinally.
Drawing:
This drawing is currently drawing 1321 ~ Secondary - 3 Gear Set, for assy 1319 (idea 11) 
Primary Pinion and Gear Reduction:
FORM: Arrow Bevel Gear Selection.
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Values for a basic stock arrow gear |
8 PD, 18/36 tooth. 8P36L18 & 8P18R36 |
8 PD, 15/45 tooth. 8P45L15 & 8P15R45 |
7 PD, 15/45 tooth. 7P45L15 & 7P15R45 (2) |
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Item: |
0923 ~ 0924 |
0143 ~ 0144 |
0193 ~ 0194 |
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Ratio: |
2 ; 1 |
3 ; 1 |
3 ; 1 |
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Horsepower: |
67 |
67 |
67 |
hp |
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Pinion Speed: |
4000 |
4000 |
4000 |
rpm |
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Pinion Working Torque: |
1056 |
1056 |
1056 |
in-lb |
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Estimated Rated Pinion Torque: |
2111 |
2111 |
2111 |
in-lb |
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Catalog Rated Pinion Torque: |
1176 |
998 |
1604 |
in-lb |
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Catalog Pinion Pitch Diameter: |
0.8125 |
0.8125 |
1 |
in |
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Pitch Line Velocity: |
852 |
852 |
1048 |
ft/min |
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Dynamic Factor: |
0.8531 |
0.8531 |
0.8407 |
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Allowable Pinion Torque: |
1003 |
851 |
1348 |
in-lb |
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Service Factor: (1) |
0.9503 |
0.8065 |
1.2773 |
:1 (1) |
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Additional Notes: |
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Outside Dia. of Primary Gear: |
4.518 |
5.627 |
6.438 |
in |
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Secondary Ratio Required |
3.3 : 1 |
2.2 : 1 |
2.2 : 1 |
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FORM: Hamilton Bevel Gear Selection.
Hamilton gear to be revised to suit new engines etc.
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Ratio: |
2.5 : 1 |
2.5 : 1 |
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Teeth: |
15 & 40 |
15 & 40 |
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Pinion Speed |
4000 |
4000 |
rpm |
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Catalog Pinion Pitch Dia. |
xx |
xx |
in. |
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Pitch Line Velocity |
xx |
xx |
ft/min |
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Diametral Pitch |
8 |
7 |
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Face Width |
xx |
xx |
in |
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Allowable Contact Stress |
200,000 |
200,000 |
Steel Rockwell C55 min. |
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Allowable Bending Stress |
30,000 |
30,000 |
Steel Rockwell C55 min. |
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Elastic Coefficient |
Pinion & Gear - Steel |
Pinion & Gear - Steel |
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Load Distribution Factor |
One member straddle mounted |
One member straddle mounted |
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Geometry Factor [I] |
xx |
xx |
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Geometry Factor [J] |
xx |
xx |
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Durability |
xx |
xx |
hp. Service factor is ? (1) |
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Strength |
xx |
xx |
hp. Service factor is ? (1) |
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Additional Notes: |
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Outside Dia. of Primary Gear: |
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Secondary Ratio Required |
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(1) Note that a reciprocating engine has a high shock loading. Note also that the long masts may absorb most/all of the shock.
(2) This is the only crown gear of the three that has the open center ( Figure 11).
Additional Related Information:
Note the
OTHER: Helicopter - Outside - Intermeshing - Kaman - K-MAX ~ Transmission
OTHER: Helicopter - Outside - Single (1seat) - Revolution - Mini-500 ~ Transmission
Notes:
Leave sufficient safety factor on the gears, and space in the housing, for a slight change in the ratio.
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Last Revised: May 31, 2008