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Propellers
Consider two principles....before you select propellers. Size and Selection.
Size: It refers to two numbers separated by a dash.... such as (10-6, 11-7, etc.)
The first number indicates the exact diameter..... of the prop in inches.
The second number is the "pitch" of the prop in inches.
Selection: Now the prop you select...for your engine... is VERY important.
It is possible to damage your engine..with an improper.. size prop.
To avoid such situations, use the prop size recommended by the engine manufacturer.
Prop Preparation: Before you use a brand new prop..... it will have to be balanced. If a new prop is used...without a proper balance it will cause engine vibration problems. A remedy for this situation is to...lightly sand the front side of the heavy blade until the prop balances. Here is what a prop balancer looks like....
Ok...now..if you have balanced your prop? You will need to enlarge the center hole of the prop.... to fit your engine's crankshaft.
A drill press will work for this procedure.
Use care when preforming this procedure. All you want to do is...Enlarge the prop...just enough to properly to fit your engine's crankshaft. A prop that has been balanced properly...will allow your engine to run much smoother and safer! Wood and Fiberglass Props are the favorites among many rc pilots. I use both. Wood props seem to give a more efficient performance.
But will break in a slightly rough landing.
They are more expensive than fiberglass props.
Now the Fiberglass is the one I fly with constantly. WHY? Because they are more durable and affordable.
Prop Safety Tips: * Do not use a prop that has been damaged!
* Do not use a prop if one tip is shorter than the other!
* Do not reach over a running prop!
REMEMBER never use your bare hands to start an rc engine use an electric starter or a (Chicken Stick). Take a look at my stick...leaning next to the airplane...
2-stroke engine chart ENGINE SIZE PROPELLERS .049 ---------6-3, 6-4, 7-3 .15 -------- 8-5, 8-6, 9-4 .19 - .25 --- 9-4, 8-6, 9-5 .29 - .30 --- 9-6, 9-7, 10-5 .35 - .36 ----10-5, 10-6 .40 --------- 10-6, 11-5 .46 --------- 10-6, 10-7, 11-5 .50 --------- 10-8, 11-7, 12-5 .61 --------- 11-7, 11-8, 12-6 .90 --------- 13-8, 14-6, 15-6 1.08 ---------16-6, 18-5 1.2-----------16-8, 16-10, 18-5 1.5-----------18-6, 18-8, 20-6 4-stroke engine chart ENGINE SIZE - PROPELLERS .40--------11-5, 11-6, 11-7 .48--------11-6, 11-7, 12-4 .60 -.65---12-6, 12-8, 13-5 .80--------13-6, 13-8, 14-4 .90--------14-6, 14-8, 15-6 1.20-------16-8, 17-6, 18-6 1.60-------18-6, 18-8, 20-6 Return to homepage from propellers
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