LEADING PARTICULARS
LEADING PARTICULARS
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Gipsy Major 10. Mark 1-1. 1-3. 1-7. I-IA. I-JA, l-7A |
Gipsy Major 10, Mark 2.1-1 |
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TYPE |
Four-cylinder, in-line, inverted, air-cooled. four-stroke, O.H.V., un-supercharged, direct drive |
Four-cylinder, in-line, inverted, air-cooled. four-stroke, O.H.V., un-supercharged, direct drive |
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ROTATION |
Left-hand tractor |
Left-hand tractor |
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CRANKSHAFT JOURNAL DIAMETER |
Mk. 1-1. 1-3, 1-7 (mod. 2244) only |
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Tapered propeller shaft |
49,976 mm., 1,970 in. |
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CRANKSHAFT JOURNAL DIAMETER |
Mk. I—IA. I—3A, and 1—7A (mod. 2385) only |
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Splined propeller shaft |
51.976 mm., 2-046 in. |
51,976 mm., 2-046 in. |
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CYLINDER: | ||
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BORE |
118 mm., 4·646 in. |
118 mm., 4·646 in. |
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STROKE |
140 mm., 5·512 in. |
140 mm., 5·512 in. |
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SWEPT VOLUME |
6,124 litres, 373·7 cu. in. |
6,124 litres, 373·7 cu. in. |
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IDENTIFICATION Commencing from propeller |
1, 2, 3, 4 |
1, 2, 3, 4 |
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FIRING ORDER |
1, 3, 4, 2 |
1, 3, 4, 2 |
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COMPRESSION RATIO |
6 to 1 |
6 to 1 |
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PERFORMANCE |
See page viii |
See page viii |
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NET DRY WEIGHT |
Mk. 1-1. 315 lb. 142,9kg. ±1½ % Mk. 1-1A 319 lb., 144,7 kg. ±1½ % Mk. 1-3, 1-7. 321 lb., 145.6 kg. ±1½% Mk. 1-3A, l-7A. 325 lb., 147,4 kg.±1½% |
325 lb., 147,4 kg. ±2½ % |
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CARBURETTOR |
One Hobson float-chamber type Al.48 NM (Pre-mod.1867),Al.48 PM (Mod. 1867) or Al.48 NM/I (Mod. 2245) with manually operated mixture (altitude) control |
One Hobson float-chamber type AI.48 PM with manually operated mixture (altitude) control |
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FUEL |
Minimum grade: 80 octane Maximum lead content : 4,0 ml. T.E.L. per Imperial gallon |
Minimum grade: 80 octane Maximum lead content: 5,5 ml. T.E.L. per Imperial gallon |
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FUEL CONSUMPTION |
See page viii |
See page viii |
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FUEL PRESSURE |
1,5 to 2,5 lb. per sq. in., 0,105 to 0,176 kg. per cm² |
1,5 to 2,5 lb. per sq. in., 0,105 to 0,176 kg. per cm² |
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OIL TYPE. normal conditions |
D.Eng.R.D. 2472 B O (see page vii) |
D.Eng.R.D. 2472 B O (see page vii) |
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OIL CONSUMPTION, maximum cruising |
1.5 to 4.0 pts/hr or ¼ to 2.0 pts/hr. (MOD.4014) |
1.5 to 4.0 pts/hr or ¼ to 2.0 pts/hr. (MOD.4014) |
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OIL PRESSURE. NORMAL at maximum cruising conditions |
38 to 45 lb. per sq. in., 2.67to 3,16 kg. per cm³ |
38 to 45 lb. per sq. in., 2.67to 3,16 kg. per cm³ |
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OIL PRESSURE. MINIMUM for acceptance at maximum cruising conditions |
381b. per sq. in., 2.67kg. per cm³ |
381b. per sq. in., 2.67kg. per cm³ |
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OIL PRESSURE. MINIMUM in flight |
30 lb. per sq. in., 2.11 kg. per cm³ |
30 lb. per sq. in., 2.11 kg. per cm³ |
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MINIMUM OIL TEMPERATURE FOR OPENING UP (COLD) |
15 deg. C |
15 deg. C |
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MAGNETOS |
Two BTH |
Two BTH |
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TYPE |
Unscreened AG4-6 or AG4-.6/1 (Mod. 2010) Screened AG4-8, AG4-10 (Mod. 1561), AG4-10/I (Mod. 2010), AG4-l2 (Mod. 1916) or AG4-12/I (Mod. 2010) |
Screened AG4-10 or AG4-10/l (Mod. 2010)
AG4-12 (Mod. 1916) or AG4- 12/I (Mod. 2010) |
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SPEED |
Crankshaft |
Crankshaft |
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ROTATION |
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Port Starboard |
Anti-clockwise Clockwise |
Anti-clockwise Clockwise |
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IMPULSE-STARTER |
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Fitted to starboard magneto |
Type Zl-1 |
Type Zl-1 |
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DISTRIBUTORS |
Integral with magnetos |
Integral with magnetos |
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SPARKING PLUGS |
Eight |
Eight |
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Plug Make |
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IGNITION TIMING | ||
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With controls at full throttle, i.e., fully advanced |
30 deg. before Top Dead Centre (T.D.C.)* |
Starboard 30 deg. before T.D.C.* Port 33 deg. before T.D.C.• |
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VALVE TIMING | ||
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Inlet opens Inlet closes Exhaust opens Exhaust closes |
20 deg. before T.D.C. 71 deg. after B.D.C. 62 deg. before B.D.C. 29 deg. after T.D.C. |
20 deg. before T.D.C. 71 deg. after B.D.C. 62 deg. before B.D.C. 29 deg. after T.D.C. |
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TAPPET CLEARANCE (COLD) | ||
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Inlet and exhaust |
0·005 in., 0,127 mm. |
0·005 in., 0,127 mm. |
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FUEL PUMP |
Dual D.H.A.C. |
Dual D.H.A.C. |
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NOTE: "Top Dead Centre" Since this engine is of the inverted type, that is to say, the crankcase is at the top with the cylinders underneath, it should be noted that the term "Top Dead Centre” refers to that position of the piston when it is at that point in its travel farthest from the crankshaft. “Bottom Dead Centre" Likewise "Bottom Dead Centre" is when the piston is at the point in its travel nearest to the crankshaft. | ||
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PROPELLER·SHAFT (integral with crankshaft) |
Mk. 1-1, 1--3, 1-7 only One-in-ten taper single key Mk. I-IA, 1-JA, 1-7A only No. I S.B.A.C. parallel spline |
No. I S.B.A.C. parallel spline |
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PROPELLER |
Approved type of fixed-pitch propeller |
Approved type of fixed-pitch propeller |
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ACCESSORIES FOR WHICH MOUNTINGS ARE PROVIDED | ||
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STARTER |
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With 3-jaw starter dog |
Rotax Type N.3.E.Y. C.0225 (24 volt) or Rotax Type N.3.E.Y. C.0209 (12 volt) |
Rotax Type N.3.E.Y. C.0225 (24 volt) or Rotax Type N.3.E.Y. C.0209 (12 volt) |
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With 12-jaw starter dog (Mod. 1538) |
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Mark 2 only Rotax Type N.3.E.Y. C.0252 (24 volt) or Plessey Type S.7 Mk. 2, Type S.I (15 gm.) Mk. 2 cartridges |
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Note Minimum permissible oil inlet temperature for cartridge starting is minus 20 deg. C. | ||
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GENERATOR |
Mk. 1-3, I-JA, 1-7, 1-7A only Rotax 12v. 150w. Type B.1820, or 24v. 50Jw. Type B.1816 |
Rotax 24v. 500w. Type B.1816 |
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VACUUM PUMP |
Mk. 1-3, I-JA, 1-7, l-7A only Plessey BJX Mk. I |
Plessey BJX Mk. I |
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OVERHAUL LIFE |
1000 hours (unconditional) | ||
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AIRCRAFT INSTALLATIONS | |||
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CHIPMUNK (Gipsy Major 10 Mk. 2) |
1000 hours |
Provided that a top overhaul of exhaust valves, stems and guides for carbon deposition is carried out after completing 500 hours service
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GEMINI (Gipsy Major 10 10 Mk. 2) |
1000 hours * |
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AUSTER {Gipsy Major 10 Mk. 2-1) |
1000 hours |
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DROVER (Gipsy Major 10 Mk. 2) |
650 hours |
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* Provided approval is obtained from The Air Registration Board | |||
