O.S. Engines 
									SUGGESTED PROPELLER SIZES  | 
						 
					 
				 
				  
					  
				
					
						 
							
								
									| Suggested 
										propeller sizes are given in the table. Note that your ideal 
										propeller diameter, pitch, and blade area should be chosen 
										by trial and error depending on your particular engine type, 
										model size, and usage. Even if propellers have the same size, 
										their properties vary considerably depending on the manufacturer. 
										Please select blades for proper balance on the left and right.  | 
									  | 
									  
											Never touch, or allow any object to come into contact 
											with, the rotating propeller and do not crouch over engine 
											when it is running. | 
								 
							  | 
					 
				 
				 
				 
				
					
						TWO-STROKE 
								ENGINES  | 
						DIA X 
							PITCH | 
					 
				 
				
					
						|   | 
						Running-in  | 
						Trainer / Sport  | 
					 
					
						| 10LA | 
						7x4  | 
						7x3-5,8x4 | 
					 
					
					
						| 25LA | 
						9x5  | 
						9x5-6 | 
					 
					
						| 46LA | 
						11x6  | 
						11x6-7 | 
					 
					
						| 65LA | 
						12x6  | 
						12x7-8,13x6-8 | 
					 
					
						|   | 
						Running-in | 
						Aerobatic / Sport  | 
					 
					
					
						| 25LA-S | 
						9x6  | 
						9x6,10x5 | 
					 
					
						| 40LA-S | 
						11x5  | 
						11x5-6 | 
					 
					
						| 46LA-S | 
						11x6  | 
						11x6-7,12x5-6 | 
					 
					
						|   | 
						Sport  | 
						Aerobatic  | 
					 
					
						| 15CV-A | 
						7x5-6,8x4-6,9x4 | 
						8x4-6 | 
					 
					
						| 25AX | 
						9x5-6,9.5x5,10x5 | 
						----- | 
					 
					
					
						| 35AX BE | 
						10x6-7,10.5x6,11x6 | 
						----- | 
					 
					
						| 46AX | 
						10.5x6,11x6-8,12x6-7 | 
						----- | 
					 
					
					
						| 55AX-BE | 
						12×7-8,13×6-7 | 
						----- | 
					 
					
						| 61FX | 
						12x6-8,13x6-7 | 
						----- | 
					 
					
					
						| 75AX | 
						13x8-10,14x6-8 | 
						----- | 
					 
					
						| 75AX-BE | 
						13x9-10,14x6-8,15x6 | 
						----- | 
					 
					
					
						| 120AX RING  | 
						15x10-12,16x8-10 | 
						----- | 
					 
					
						| 120AX RING-BE | 
						15x10-12,16x8-10 | 
						----- | 
					 
					
						| 140RX | 
						----- | 
						16x14,17x13 | 
					 
					
						| 160FX RING | 
						15x13-14,16x12-14, 
							17x12-13,18x8-10,20x8 | 
						----- | 
					 
					
						| BGX-1 RING(RN) | 
						18x10-12,20x8-10 | 
						18x10-12,20x8-10 | 
					 
					
						|   | 
						Running-in  | 
						Sport/Acro/Scale  | 
					 
					
					
						| GT33 | 
						18x8 | 
						18x10,18x12,19x10,20x8,20x10 | 
					 
							
								| GT22 | 
								15x10 | 
								16x8,16x10,17x6,17x8 | 
							 
						 
				 
				 
				
				
					
						Single-cylinder  | 
						Sport & Stant  | 
						Scale  | 
					 
					
						| FS-30S | 
						9x6-7,10x4 | 
						10x5-6 
						 | 
					 
					
						| FS-40S | 
						10x7-7.5,11x6 | 
						10x7,10.5x6,11x7, 
							12x5-6 
						 | 
					 
					
					
						| FSα-56 | 
						12x6-8,13x6 | 
						12x6-8,13x6-7 | 
					 
					
						| FL-70 | 
						12x7,12.5x6,13x6 | 
						12.5x6,13x6-7 
						 | 
					 
					
						| FSα-72 | 
						12x7-8,13x6-8,14x6-7 | 
						12x7-8,13x6-8,14x6-7 | 
					 
					
						| FSα-81 | 
						13x7-9,14x6-7 | 
						13x7-9,14x6-7 | 
					 
					
						| FSα-81-P | 
						13x7-8,14x6-8 | 
						13x7-8,14x6-8 | 
					 
					
						FS-91S II 
							FS-91S II-P | 
						11x11-12,12x10-12,13x9 | 
						13x9,14x7,15x6,16x6 | 
					 
					
					
						| FSα-110 | 
						13x9-11,14x8-10 | 
						15x8,16x8 | 
					 
					
						| FSα-110-P | 
						13x9-11,14x8-10, 
							15x8,16x8 | 
						13x9-11,14x8-10,15x8,16x8 | 
					 
					
						| FSα-155-P | 
						16x8-12,17x8-12 | 
						16x8-12,17x8-12 | 
					 
					
						| FS-120S-E | 
						13x11-12,14x10-11, 
							15x8,16x6-7 | 
						15x8,16x6-7,18x5-6 
						 | 
					 
					
					
						| FS-200S-P | 
						16x12N-15,16.5x12-14, 
							17x10N-13,18x6W-12, 
							20x8 | 
						16x12N-15,16.5x12-14, 
							17x10N-13,18x6W-12, 
							20x8 | 
					 
					
						| FS-200S | 
						15x12-14,16x12-14, 
							17x10-13,17x12-13, 
							18x6-10,18x8-12,20x8 | 
						15x12-14,16x12-14, 
							17x10-13,17x12-13, 
							18x6-10,18x8-12,20x8 | 
					 
					
						Twin & Multi-cylinder  | 
						Sport & Scale  | 
					 
					
					
						| IL-300 | 
						18x10-12,20x8-10,22x8  | 
					 
					
					
						| FT-300 (Super Gemini-300) | 
						 18x10-12,20x8-10,22x8  | 
					 
				
					
						| FR5-300 (Sirius) | 
						 18x10-12,20x8-10,22x8  | 
					 
				 
				 
				 
				
				
					
						ROTARY ENGINE  | 
						Sport & Scale | 
					 
					
						| ROTARY ENGINE 49PI TypeII | 
						9x6-7,10x4-6,11x4-5  | 
					 
				  |