Propeller Drawing (Holst Method)
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Holst Method for drawing marine propeller
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Propeller Drawing (Holst Method)
- 1. HOW TO DRAW PROPELLER Holst Method ?? REPRESENTED BY : Ahmed Taha
- 2. r1 =0.2 R r2 =0.3 R r3 =0.4 R r4 =0.5 R r5 =0.6 R r6 =0.7 R r7 =0.8 R r8 =0.9 R r9 = R 3.000 o I G1 c1 E1 F1 E’1 E’’1 F’’1 F’1 P/ 2pi D1 B1 D’’ B’’ Direction Of Rotation G3 c3 E3 E’’3 E’3 F’’3 F’3 B3 D3 B3’’ D3’’ G5 c5 E5 F1 E’5 E’’5 F’’5 B5’’ Developed Outline Projected Outline Transverse ViewExpanded blade C - FC – E line of max. thickness Expanded blade outline Side elevation 15 ̊ Root thickness Directrix Tip thickness Generator line F – F’E – E’ B–B’ D–D’ Longitudinal projected line Rake CE CF PMT to LE
- 3. Back – Trailing Edge Back – leading Edge Face – leading EdgeFace – Trailing Edge PMT 100 % 80 % 60 % 40 % 20 % 20 % 40 % 60 % 80 % 90 % 95 % 100 %
- 4. REPRESENTED BY : Ahmed Taha