A cutaway 5-cylinder four-stroke radial engine (35 bore x 30 stroke) with one master rod and four articulated rods on a single crankpin, pistons, wrist pins, counterweighted crankshaft on two ball bearings, a gear-driven cam ring, pushrods, rockers and two valves per cylinder. The model is shown at a parametric crank angle; the master-rod assembly can be shifted axially to show how it is installed.
| Bore x Stroke | 35 x 30 mm |
|---|---|
| Displacement | 5 x 28.9 = 144 cm3 |
| Master rod / articulated rod | 60 / 46 mm, knuckle radius 18 mm |
| Firing order | 1-3-5-2-4, fires every 144 deg crank |
| Cam ring | 3 lobes per track, 1/6 crank speed, opposite rotation |
| Timing (crank deg after cyl1 TDC-fire) | Cyl1 0, Cyl3 144, Cyl5 288, Cyl2 432, Cyl4 576 |
| Valve timing | IO 10 BTDC, IC 40 ABDC, EO 40 BBDC, EC 10 ATDC |
| Slave stroke deviation | ~ +0.2 to +0.4 mm vs master (30.0) |
| Valve-to-piston clearance at TDC overlap | >= 4 - lift(10deg) ~ 3.5 mm |
| Overall size | 248.98 × 236.8 × 60 mm |
| Parts | 64 |
| Material | Steel (S235) |
| Mass (calculated) | 2199.1 g |
| General tolerance | ± 0.2 mm (ISO 2768-m) |
| Process | machining |
| 2× | Deep groove ball bearing 6001 ISO 15 |
| 01 | crankcase 100 × 95.11 × 28 mm · 288.6 g |
| 02 | main_bearing_r 28 × 28 × 8 mm · 24.8 g |
| 03 | main_bearing_f 28 × 28 × 8 mm · 24.8 g |
| 04 | crankshaft 48 × 48 × 60 mm · 163.3 g |
| 05 | master_rod 48 × 89.6 × 8 mm · 135.4 g |
| 06 | cam_ring 75.5 × 72 × 5 mm · 51.1 g |
| 07 | piston_1 34.8 × 24 × 21.4 mm · 41.5 g |
| 08 | wrist_pin_1 8 × 8 × 29 mm · 11.4 g |
| 09 | cylinder_1 41 × 59 × 20.5 mm · 82.9 g |
| 10 | head_1 45 × 12 × 30 mm · 121.8 g |
| 11 | valve_intake_1 9.6 × 21.5 × 9.6 mm · 3.9 g |
| 12 | rocker_intake_1 8 × 4 × 26 mm · 6.5 g |
| 13 | pushrod_intake_1 3 × 83 × 3 mm · 4.6 g |
| 14 | valve_exhaust_1 9.6 × 21.5 × 9.6 mm · 3.9 g |
| 15 | rocker_exhaust_1 8 × 4 × 26 mm · 6.5 g |
| 16 | pushrod_exhaust_1 3 × 83 × 3 mm · 4.6 g |
| 17 | slave_rod_2 54.4 × 8.45 × 6 mm · 16.1 g |
| 18 | knuckle_pin_2 5 × 5 × 12 mm · 1.9 g |
| 19 | piston_2 33.58 × 40.51 × 21.4 mm · 41.5 g |
| 20 | wrist_pin_2 8 × 8 × 29 mm · 11.4 g |
| 21 | cylinder_2 68.78 × 57.23 × 20.5 mm · 82.9 g |
| 22 | head_2 25.32 × 46.51 × 30 mm · 121.8 g |
| 23 | valve_intake_2 22.7 × 13.59 × 9.6 mm · 3.9 g |
| 24 | rocker_intake_2 6.28 × 8.84 × 26 mm · 6.5 g |
| 25 | pushrod_intake_2 79.86 × 28.5 × 3 mm · 4.6 g |
| 26 | valve_exhaust_2 22.7 × 13.59 × 9.6 mm · 3.9 g |
| 27 | rocker_exhaust_2 6.28 × 8.84 × 26 mm · 6.5 g |
| 28 | pushrod_exhaust_2 79.86 × 28.5 × 3 mm · 4.6 g |
| 29 | slave_rod_3 27.8 × 50.11 × 6 mm · 16.1 g |
| 30 | knuckle_pin_3 5 × 5 × 12 mm · 1.9 g |
| 31 | piston_3 42.26 × 39.87 × 21.4 mm · 41.5 g |
| 32 | wrist_pin_3 8 × 8 × 29 mm · 11.4 g |
| 33 | cylinder_3 67.85 × 71.83 × 20.5 mm · 82.9 g |
| 34 | head_3 43.46 × 36.16 × 30 mm · 121.8 g |
| 35 | valve_intake_3 18.54 × 21.68 × 9.6 mm · 3.9 g |
| 36 | rocker_intake_3 8.82 × 7.94 × 26 mm · 6.5 g |
| 37 | pushrod_intake_3 51.21 × 68.91 × 3 mm · 4.6 g |
| 38 | valve_exhaust_3 18.54 × 21.68 × 9.6 mm · 3.9 g |
| 39 | rocker_exhaust_3 8.82 × 7.94 × 26 mm · 6.5 g |
| 40 | pushrod_exhaust_3 51.21 × 68.91 × 3 mm · 4.6 g |
| 41 | slave_rod_4 27.8 × 50.11 × 6 mm · 16.1 g |
| 42 | knuckle_pin_4 5 × 5 × 12 mm · 1.9 g |
| 43 | piston_4 42.26 × 39.87 × 21.4 mm · 41.5 g |
| 44 | wrist_pin_4 8 × 8 × 29 mm · 11.4 g |
| 45 | cylinder_4 67.85 × 71.83 × 20.5 mm · 82.9 g |
| 46 | head_4 43.46 × 36.16 × 30 mm · 121.8 g |
| 47 | valve_intake_4 18.54 × 21.68 × 9.6 mm · 3.9 g |
| 48 | rocker_intake_4 8.82 × 7.94 × 26 mm · 6.5 g |
| 49 | pushrod_intake_4 51.21 × 68.91 × 3 mm · 4.6 g |
| 50 | valve_exhaust_4 18.54 × 21.68 × 9.6 mm · 3.9 g |
| 51 | rocker_exhaust_4 8.82 × 7.94 × 26 mm · 6.5 g |
| 52 | pushrod_exhaust_4 51.21 × 68.91 × 3 mm · 4.6 g |
| 53 | slave_rod_5 54.4 × 8.45 × 6 mm · 16.1 g |
| 54 | knuckle_pin_5 5 × 5 × 12 mm · 1.9 g |
| 55 | piston_5 33.58 × 40.51 × 21.4 mm · 41.5 g |
| 56 | wrist_pin_5 8 × 8 × 29 mm · 11.4 g |
| 57 | cylinder_5 68.78 × 57.23 × 20.5 mm · 82.9 g |
| 58 | head_5 25.32 × 46.51 × 30 mm · 121.8 g |
| 59 | valve_intake_5 22.7 × 13.59 × 9.6 mm · 3.9 g |
| 60 | rocker_intake_5 6.28 × 8.84 × 26 mm · 6.5 g |
| 61 | pushrod_intake_5 79.86 × 28.5 × 3 mm · 4.6 g |
| 62 | valve_exhaust_5 22.7 × 13.59 × 9.6 mm · 3.9 g |
| 63 | rocker_exhaust_5 6.28 × 8.84 × 26 mm · 6.5 g |
| 64 | pushrod_exhaust_5 79.86 × 28.5 × 3 mm · 4.6 g |