How do I convert from a 2 blade to a 3
or 4 blade ?| Prop Chart |
| Engine Manufacturers' Prop Specifications |
How do I convert from a 2 blade to a 3
or 4 blade ?
| A&P Hornet |
| .09 Break-In: 7x4 After Break-In: 6x4, 6x5, 7x3, 7x3.5, 7x4 |
| Wasp .061 Break In: 5.7X3 After Break-In: (4.75X4.75, 5X3, 5.5X2, 5.5X2.5, 5.7X3, 6X2, 6X3, 6X4, 7X3) |
| Cox |
| Texaco .049:7x3.5 |
| Black Widow .049: 6x3, 5x3, or 5x3 three-bladed |
| Baby Bee .049: 6x3, 5x3, also 5x3 3-bladed. |
| Tee Dee .010: 3 x 1.25" |
| Tee Dee .049: 6x3, 5x3, or 5x3 three-bladed |
| Cox Tee Dee .09: 7x3.5 |
| Evolution |
| .36-NT: Bench Mark Prop, 9x6: Prop Rang, 9x5 - 11x4 |
| .40-NT: Bench Mark Prop, 10x6 |
| .46-NT: Bench Mark Prop, 11x6 |
| .61-NT: Bench Mark Prop, 11x7: Prop Range, 11x7 - 12x6 |
| 1.00-NX: Bench Mark Prop, 14x6: Prop Range, 13x6-16x4 |
| 26GT-1.6, Gas: Bench Mark Prop, 18x6: Prop Range, 16x8 - 18x8 |
| 35GT-2.15 Gas: Bench Mark Prop, 19x8: Prop Range, 18x8 - 21x10 |
| 58GX-3.6 Gas: Bench Mark Prop, 24x10: Prop Range, 22 x 10 - 26 x 10 |
| Fox |
| .15C/L: 8x4 |
| .35C/L: 10x6 |
| .40/B: 10x6 |
| .15 BB: 8x4 |
| .25 BB: 9x4 |
| .40 BB: 10x6 |
| .46 BB: 10x6 or 11x7 |
| .74 Eagle: 11x8,11x9,12x6,12x7,13x5,13x6,14x4,or 14x5. |
| GMS |
| .25 ABC-BB Break-In: 8x4 After Break-In 7x6-8x6 |
| .32 ABC-BB Break-In: 8X6 After Break-In 8x6-9x6 |
| .40 ABC-BB Break-In: 10x6 After Break-In, Sport Model: 10x7, 11x6, Racing Model: 9x6, Scale Model: 11x6 |
| .47 ABC-BB Break-In: 10x7 After Break-In, Sport Model: 10x7, 11x6, Racing Model: 9x6, Scale Model: 11x6 |
| .61 BB-Ringed Break-In: 11x7 After Break-In, Sport Model: 11x8, Racing Model: 11x7, Scale Model: 12x6 |
| .76 BB-Ringed Break-In: 11x7 After Break-In, Sport Model: 12x6, Racing Model: 11x8, Scale Model: 13x6 |
| 1.20 BB-Ringed: Sport 16x10, Racing 16x8, Scale 18x5, 18x6 |
| Magnum |
| XL-15A BB-ABC Sport Break-In: 7X6After Break-In, 7x6, 8x4 |
| XL-28A: 9x5, 9x6, or 9x7 |
| XL-25A BB-ABC-FSR Break-In: 9x6 @ Break-In, 9x5, 9x6 |
| XLS-46 BB-ABC-FSR Break-In: 10x5 @ Break-In, 10x5, 10x6 |
| XLS-52 BB-ABC-FSR Break-In: 10x5 @ Break-In, 10x6 |
| XL-30 RFS-4 Stroke Break-In: 9x5 @ Break-In, 9x5, 9x6, 9x7, 9x8, 10x4, 10x5, 10x6, 11x3, 11x4. |
| XL-52 RFS-4 Stroke Break-In: 12x5 @ Break-In, 11x7, 11x8, 11x9, 12x5, 12x6, 12x7, or 13x4 |
| XL-91 RFS-4 Stroke: 13x8, 14x6 |
| XL-70 RFS-4 Stroke: 12x7-8, 13x5-8, 13x6, 14x5, 14x6. |
| XL-120AR-4 stroke Break-In: 15x6 @ Break-In, 15x6, 15x8, 15x10, 16x6, or 16x8. |
| XL-180 RFS-4 Stroke |
| Megatech |
| .15-BB-ABC: 8x4 |
| M-61 ABC: 11x7, 12x6 or 13x5 |
| MDS |
| .48 Pro: 10x6, 10x7 |
| OS |
| 10-LA Break-In: 7x4 After Break-In, 7x4 or 7x5 |
|
15-LA Break-In: 8X4 After Break-In,
Trainer and Sport Models: 7X5-6, 8X4-5, Scale Models: 7X5-6, 8X4-5 |
| CV-15A Break-In:7x5 After Break-In, Sport: 7x5, 7x6, 8x4, 8x6, 9x4, Aerobatic: 8x4, 8x6. |
| 35-LA Break-In: 9x5 After Break-In, Sport Models: 9X5, 9X6, Scale Models: 9X5, 9X6, 10X5 |
| 25-FX:
Pattern Flying: 9X5, 9X6, Pattern Flying if a tuned pipe is used: 9.5X5, Sport Flying: 9X5, 9X6, 9.5X5, 10X4, 10X5 |
| 32-SX: 10x6, 10.5x6, 11x6 |
| 40-LA
Break-In: 11x5 After Break-In, Trainer and Sport Models: 10X6.5, 10.5x6, 11x5, Scale Models: 10.5x6, 11x6 |
|
46-LA Break-In:11x6 After break-In,
Trainer and Sport Models: 11X6, 11x7, Scale Models: 12x5, 12x6 |
| 40-FX
Break-In:11x5 After Break-In, Scale Aircraft: 10.5x6, 10.5x7, 10.5x8, 11x6,
11x7, Trainer and Sport: 10x6, 11x6 |
|
46-FX Break-In:11x6 After Break-In: 11x6,
Pattern/Tuned Pipe: 12x7, 12x8, 12x9, 11x8, 11x9, 11x10, Sport: 10.5x6, 11x6, 11x7, 12x6, 12x7 Fun Fly/Slow Vertical Aerobatics: 12x3.5 12x4 |
| 46-AX Break-In:10x6 After Break-In, 10.5x6, 11x6-8, 12x6-7 |
| 50-SX Ringed: 10x8, 11x7 |
| 65-LA Break-In:12x6 After Break-In, 12x7,12x8,13x6,13x7, or 13x8 |
|
61-FX Break-In:11x7 After Break-In, Tuned
Pipe: 12x9, 12x10, 12x11, Sport: 12x6, 12x7, 12x8, 13x6, 13x7 |
| 1.08 FSR: 14X6, 14X7, 14X8, 15X6, 15X7, 15X8, 16X6, 18X6 |
| 91-FX: 13x6, 13x8, 13x10, 14x6, 14x8, 14x10, 15x6, 15x8, 16x6 |
| BGS-1 3500: 18x8, 18x9, 18x10, 18x11, 18x12, 20x8, 20x9, 20x10 |
| 1.60-FX: Aerobatic: 15x12-14, 16x10-14, and 16.5x10-13, Sport: 17x10-13, 18x10-12 |
| 1.60-FX-FI: 16x12-14, 16.5x12-13, 17x12, 17x10-13, 18x8-10 |
| 1.40-RX Ringed W/Pump: 15X14, 16X14 |
| 1.40-RX-FI: 16x14 (2-blade), 15x12 (4-blade), 15x13.5 (3-blade), 15x14 (3-blade) |
| FS-30 Surpass 4/S: 9x6, 9x7, 10x4, or 10x6 |
| FS-40 Surpass 4/S: 10X7.5, 11X6, 12X5, 12X6 (2-blade), 9X7 (3-blade) |
| FS-52 Surpass 4/S: 10X8, 10X9, 10.5X8, 10.5X9, 11X6, 11X7, 11X7.5, 12X5, 12X6, 12.5X6 |
| FS-70 11
Surpass 4/S: Sport & Stunt models: 11x8, 11x9, 12x7, 12x8, 12.5x6, Scale
models: 13.8x8, 14x7, 15x6, 16x6, 3-Blade: 11x7 |
|
FS-70 Ultimate 4/S W/Pump: 13x7-8
Propeller for sport and stunt aircraft, 13x6 Propeller for aerobatic aircraft |
| FS-FL-70 4/S: Sport & Aerobatic - 12x7, 12.5x7 and 13x6, Trainer & Scale, 12.5x7, 13.6-7 |
|
FS-91- 11 Surpass W/Pump: Stunt planes:
11X10, 11X11, 12X9.5, 12X10, 12X11, Scale models: 13.5X8, 14X7, 15X6, 16X6, (12X8 & 12.5X7-3 blade) |
| FS-91-11
Surpass4/S: 11X11-12, 12X10-12, and 13X9, Scale models: 13.5X8, 14X7, 15X6, 16X6, (12X8 & 12.5X7-3 blade) |
| FS-91 Surpass 11-FI 4/S: 13x9. 13x10, 13x11, 12.5x9, 12x13 and 14x10 |
| FS-1.20-SE-Surpass 4/S: 13X11, 13X12, 14X10, 14X11, 15X8, 16X6, 16X7, 17X6 |
| FS-120-111 Surpass W/Pump 4/S: 14X9, 14X10, 14X11, 15X8, 15X9, 15X10, 16X6, |
| FS-FT-160 Twin 4/S: 15X8, 16X6, 18X6, 18X7, 18X8, 20X6 |
| FS-FT-300 Twin 4/S: 18X10,18X11,18X12,18X13,18X14,20X8,20X9,20X10,20X11, 22x8 |
| FS-FR-5-300-5 Cylinder 4/S: 18X12, 18X13, 18X14, 20X8, 20X9, 20X10, 22X8 |
| FF-320-4 Cylinder RC-4/S: 18X10, 18X11, 18X12, 18X13, 18X14, 20X8, 20X9,20x10, 22x8 |
| Saito |
| .30S AAC: MM: Bench Mark Prop, 10x6: Prop Range, 9x6, 10x6 |
| FA-40 A: Bench Mark Prop, 11x7 Prop Range, 10x7 - 11x6 |
| .56-AAC: Bench Mark Prop, 12x6: Prop Range, 11X8 - 12X7 |
| .65-AAC: Bench Mark Prop, 13x6: Prop Range, 12 x 6 - 13 x 6 |
| .72-AAC: Bench Mark Prop, 13x8: Prop Range, 12x8 - 14x8 |
| .82-AAC: Bench Mark Prop, 13x8: Prop range, 12 x 8 - 15 x 4 |
| .90 3-Cylinder Radial: TT: No Data From Horizon Hobby |
| .90TS Flat Twin AAC, LL: Bench Mark Prop: No Info From Horizon Hobby |
| .91 Special AAC: Bench Mark Prop: 14x6: Prop Range, 12x8 - 15x6 |
| 1.00 FA-AAC: Bench Mark Prop: 14x8 APC: Prop Range, 13x9 - 14x10 |
| 1.00 Twin Cylinder ABC w/Muffler: No Data from Horizon Hobby |
| 1.00Ti Inline Twin Cylinder: Bench Mark Prop: 14x6: Prop Range, 14x6 - 15x6 |
| 1.20 Special AAC: Bench Mark Prop: 15x8: Prop Range, 14x8 - 16x10 |
| 1.50 AAC w/Muffler: Bench Mark Prop: 16x8: Prop Range, 16x8 - 18x6 |
| 1.70 3-Cylinder Radial: No Data from Horizon Hobby |
| 1.80 AAC w/Muffler: Bench Mark Prop: 18x6: Prop Range, 15x8 - 18x6 |
| 1.82 Twin Cylinder Dual Plug: No Data from Horizon Hobby |
| 2.00Ti AAC: Bench Mark Prop: 17x8: Prop Range, 16x8 - 18x10 |
| FA-220A AAC: Bench Mark Prop: 19x8: Prop Range, 17x12 - 20x8 |
| 3.00 Twin Cylinder AAC: No Data from Horizon Hobby |
| 3.00 Twin D Plug /W Twin Carbs, Pump: No Data from Horizon Hobby |
| 3.25 5-Cylinder Radial Dual Plug: No Data from Horizon Hobby |
| SuperTigre |
| G-34 Ringed: 9x6, 9x5 |
| GS-40 Ringed: Break-In, 10x6 After Break-In, 9x7, 9x8, 10x5, 10x6, 10x7, 11x4, and 11x5 |
| GS-45-ABC: Break-In, 10x7 After Break-In, 10X6 or 9.5X6 |
| G-51 Ringed: 10x6, 9-1/2x6 |
| G-61 Ringed: Break-In, 11x7After Break-In, Tuned Pipe or Tuned Silencer: 11x7.5, 12x8 |
| G-61 ABC: Break-In, 11x7 After Break-In, Tuned Pipe or Tuned Silencer: 11x7.5 or 12x8 |
| G-75 Ringed: 12x6, 13x6 |
| G-90-Ringed: 12x8, 13x6 |
| G-2300-Ringed: 18x8, 18x10 |
| G-3200: 20x8, 18x8 |
| G-4500: 20x10, 22x8 |
| Thunder Tiger |
| GP 15 ABC:
8x4.5 Break-In, After Break-In, 7x5.5, 8x4.5-5.5 (aerobatic) 7x5.5, 8x4.5-5.5 (sport and scale) |
|
GP 25 ABC: 9x5.5 break-in, After Break-In,
9x5.5 (Aerobatic) 9x5.5, 10x5.5 (Sport and Scale) |
| Pro .36
Ball Bearing ABC: 10x6 break-in, After Break-In, 9x7, 9.5x6, 10x6
(Aerobatic) 9x6.5, 9x7, 9.5x6, 10x6 (sport and scale) |
|
Pro .40 Ball Bearing ABC: 10x6 break-In
After Break-In, 10x6 (Aerobatic) 11x5, 10x6 (Sport and Scale) |
| GP 42 ABC: 10x6 Break-In After Break-In, 10x6 (Aerobatic) 10x6, 10.5x7 (Sport and Scale) |
|
Pro .46 Ball Bearing ABC: Break-In: 11x5
After Break-In, Sport and Scale: 10.5x6, 11x6 Aerobatic: 10x6.5, 10.5x6, 11x5 |
| GP .61 ABC: 11x7 break-in, After Break-In, 11x7 (Aerobatic); 11x7 (Sport and Scale) |
|
Pro .61 Ball Bearing ABC: 11x7 Break-In,
After Break-In, 11x9, 11x10, 10x11 (Aerobatic) 11x8, 12x7, 12.5x6 (Sport and Scale) |
| F-54S 4-Stroke: Break in / 11x5, Flying / 10x9 - 11x8 |
| F-91S 4-Stroke: Break in / 11x10, Flying / 11x10 - 13x9 |
| Tower Hobbies |
| .46-BB-ABC:
Break-In 10x7 @ Break-In, Trainer and Sport Models: 10X6, 10x7, 10x8, and
11x6. Scale Models: 10X6, 10x7, 11x6, 11x7 |
| .61-BB-ABC: 11X7 or 12x6 |
| .75-BB-ABC: 12X6 or 13x6 |
| Webra |
| Speed .25 GT: 9 x 6 - 10 x 6 |
| Speed 32GT: 10x5 - 11x4 |
| Speed .36GT Aero: 9x4 - 11x5 |
| Speed 50GT: 11x4 - 11x7 |
| Speed 61F Aero: 11x7 - 12x8 |
| Speed .55GT Aero: 10x7 - 12x6 |
| Speed 120 w/Pump: 16x8 - 18x6 |
| Speed 120: 16x8 - 18x6 |
| Racing 1.60 AAR Aero w/p: 16x14 - 18x10 |
| YS |
| .63-S-4 Stroke: 11x7, 11x9, 12x6, 12x8 |
| 1.10-FZ-4-Stroke: 13x11, 13x13, 13.5x10, 14x10, 14x12 |
| 1.40-DZ-4-Stroke: 15x14 to 17x12, or any prop which allows the engine to run in the 8000 to 8500 rpm range |
| 1.40-L-4-Strokes: 14x14, (15x12 through 14), (16x11 through 14) |
| 1.40 Sport-4-Stroke: 14x14 to 16x11, or any prop which allows the engine to run in the 8000 to 8500 rpm range |
| 1.60-DZ-4-Stroke: 16x13 to 17x12 |
| Zenoah |
| G26 Air Engine (25.4cc): 16x8 |
| G38 Engine (2.3 cu in): 16 x 8 - 18 x 6 |
| G45 Engine (2.8 cu in): 18 x 8 - 20 x 7 |
| G62 Engine (3.8 cu in): 20x8 - 22x10 |
| GT-80 Twin Cylinder (4.88 cu in): 22x12 - 24x10 |
The conversion for a three and four bladed propeller is a simple tasked if you
know what two bladed propeller you use on a given Engine.
For example, on a
three bladed propeller you would
drop the diameter and keep the pitch.
On a four bladed, you would
drop the diameter and the pitch.
For instance if you had a two
bladed 24-10 propeller and you wanted a three bladed you would use a 22-10 and
so on.
| Two Bladed | Three Bladed | Four Bladed |
| 10-6 | 9-6 | |
| 11-8 | 10-8 | 10-6 |
| 12-8 | 11-8 | 11-6 |
| 12-10 | 11-10 | 11-8 |
| 13-10 | 12-10 | 12-8 |
| 14-10 | 13-10 | 13-8 |
| 14-8 | 13-8 | 13-6 |
| 15-8 | 14-8 | 14-6 |
| 15-10 | 14-10 | 14-8 |
| 16-10 | 15-10 | 15-8 |
| 18-10 | 16-10 | 16-8 |
| 20-10 | 18-10 | 18-8 |
| 22-10 | 20-10 | 20-8 |