Item 1928

DESIGN: SynchroLite ~ Power Train (for 2 motors) - Assembly - Layout - Electric Motor - 2 Flytec

Overview:

DESIGN: SynchroLite ~ Power Train (for 1 engine) - Assembly - Layout - Belt & 2 Gear Sets (10)

Drawing of Electric Power-train for SynchroLite Helicopter:

View A displays:-

10 DP gears

Crown & pinion at stock 90º

Twin X-shafts with coupling (1)

View B displays:-

8 DP gears

Crown & pinion at custom 101º

Single X-shaft

Any combination of the above 3 options is available.

  1. Coupling can be constant velocity joint, double universal joint, or pair of bevel gears on X-shafts that are rotated 30º or 45º forward.

Additional information is in envelope in SynchroLite - Power-Train binder.

Electrics- Flytec:

Notes:

 

Gears:

 FORM: Arrow Spiral Bevel Gear Selection.

 

 

basic Arrow gear 10 PD

basic Arrow gear 8 PD

 

 

 

10P45L15 & 10P15R45

8P45L15 & 8P15R45

 

 

 

Item 0226 & 0227

Item 0143 & 0144

 

 

OD of gear

4.492

5.627

"

 

Bore of pinion

0.625

0.75

"

 

Horsepower:

17.43

17.43

hp

 

Pinion Speed:

1980

1980

rpm

 

Pinion Working Torque:

540

555

in-lb

 

Estimated Rated Pinion Torque:

1110

1110

in-lb

 

Catalog Rated Pinion Torque:

540

998

in-lb

 

Catalog Pinion Pitch Diameter:

1.5

1.875

in

 

Pitch Line Velocity:

778

973

ft/min

 

Dynamic Factor:

0.8582

0.8452

 

 

Allowable Pinion Torque:

463

843

in-lb

 

Service Factor:

0.835

1.52

:1

 

FORM: Hamilton Spiral Bevel Gear Selection.

 

 

10 PD

8 PD

 

 

 

15 / 45 teeth

15 / 45 teeth

 

 

 

Item 0226 & 0227

Item 0143 & 0144

 

 

Pinion Speed

1980

1980

rpm

 

Catalog Pinion Pitch Dia.

1.5

1.875

in.

 

Pitch Line Velocity

778

973

ft/min

 

Diametral Pitch

10

8

 

 

Face Width

0.6875

0.8125

in

 

Allowable Contact Stress

200,000

200,000

Steel Rockwell C55 min.

 

Allowable Bending Stress

30,000

30,000

Steel Rockwell C55 min.

 

Elastic Coefficient

Pinion & Gear - Steel

Pinion & Gear - Steel

 

 

Load Distribution Factor

One member straddle mounted

One member straddle mounted

 

 

Geometry Factor [I]

.119

.119

 

 

Geometry Factor [J]

.247

.247

 

 

Durability

12.56

23.2

hp.

 

Strength

18.25

32.0

hp.

 

Durability Service Factor

 

 

 

 

Strength Service Factor

 

 

 

The following notes relate to the two columns in the Hamilton calculations above.

    1. The bore diameter for the Arrow 6P15 pinion is xx" diameter. This is fine for xx horsepower but the power for both masts must pass through the Starboard pinion. By increasing the pinion by one tooth (xx) the bore can be xx" diameter and this is good. Note that the stagger must be opened up from xx" to xx" and the gears must be dropped by xx" ~ to the location of the pilot's spine's most forward point.
    2. The angle between the gears is xxº and hopefully this will allow the input shaft to have a diameter slightly greater than the Arrow xx" diameter.

 

FORM: Hamilton Straight Tooth Gear Selection.

This is the above table with the Geometry Factors changed to straight tooth values.

 

Geometry Factor [I]

.074

.074

.074

 

 

Geometry Factor [J]

.228

.228

.228

 

 

Durability

7.8

14.4

23.2

hp.

 

Strength

16.85

29.5

45.9

hp.

 

Durability Service Factor

 

 

 

 

 

Strength Service Factor

 

 

 

 

Overrunning Clutch:

Some of the following has been copied over from 1316 and MAY have to be modified

The overrunning clutch is to be located between each motor and its input shaft to the gearbox. The torque is 132 ft-lb Power Train Access Form

 ?

Consider 2 Warner CSK 35 (Item 0568), Max. torque 207 ft-lb. Sprag. C/w brgs, 0.66 lbs.

 ?

Consider Warner CSK 40, (Item 0741) Max. torque 384 ft-lb. Sprag. C/w brgs?, 1.10 lbs. This weighs more but it means less material in adjoining items.

 

Consider 2 Marland-RINGSPANN R206 (Item 0524), Max. torque 195 ft-lb. No brgs. Keyway

 

Consider Marland-RINGSPANN R208 (Item 0141), Max. torque 450 ft-lb. No brgs. Keyway

 

http://www.stieber.de/products/gfkgb.html

 

Look into the other ones mentioned on the line below

For additional information see: Overrunning Clutch: Overrunning Clutch for SynchroLite with 1 engine Overrunning Clutch for SynchroLite with 2 engines

Housing:

An upper casting will contain the bearings for the mast and the attachment lug to the fuselage. The lower portion may consist of two halves, which might be identical except LH & RH, The left hand one has a plug where the input shaft is on the right hand one and this allows for a future PTO.

 Lubrication:

Splash from bottom center by oil flinger.

 Mounting:

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Initially displayed: July 14, 2010 ~ Posted to Rotary Wing: July 14, 2010 ~ Last Revised: September 12, 2011

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