I would like to start preparing a order for some propellors to get ready for spring. I would like some advice. Keep in mind that I have never flown before so I will need suitable sizes that will reflect that fact.

Eflite Park 450 outrunner for Electric J3 cub
GMS2000 .32 for Kadet LT-25
O.S .40 for Tower Trainer 40
Maxnum XL .25 for Kadet Seniorita
ASP .46 for Kadet LT-40
AXI Goldline 2826/12 electric for Lanier ST-40 Super Trainer

As you can see I will have a fine fleet to learn on, and I really like the Kadet kits.

I think, this list might help ya

Starting Prop Engine Size

6x3 .049
7x4 .09
8x4 .15
9x4 .19 - .25
9x6 .20 - .30
10x6 .35 - .36
10x6 .40
10x7 .45
11x6 .50
11x7 .60 - .61
12x6 .70
13x6 .78 - .80
14x6 .90 - .91
16x6 1.08
16x8 1.20
18x6 1.50
18x8 1.80
20x8 2.00

Mody

These are my thoughts for the glow engines. I've never had electric power and have no clue about them.

GMS 32 - 9x6, 10x4 or 10x5 (tower recommends using 8x6 for break-in)

OS 40 - which one is it? LA, FP, FX, other?

Magnum 25 - 9X5, 9X6, 10X4

ASP 46 - 10x6, 10x7, 11x5, 11x6, 12x4. Magnum, similar to ASP (some say identical), recommends a prop the lets the engine turn 13000-16000 rpm on the ground. Magnum recommends using 10x6 for break-in.


For learning, the black nylon props from Master Airscrew seem to be good. They have some flexibility that lets them take abuse that would break a wood prop or a stiff plastic prop like an APC.


Prop selection sometimes seems like black magic. One person will rave about a certain engine/prop combination and the first reply will be about how bad the combination is. You pretty much have to buy a sack of props and try different ones until you find the setup YOU like, no matter what the next guy likes or doesn't like.


On all of the engines, I think you should go for the largest diameter that provides decent ground clearance. Lets assume (a dangerous thing) that the Magnum 25 will turn a 9x6 or 10x4 prop at about 14000 rpm (and the number is pretty close for both props). The 10 inch prop would provide more thrust (pulling power) than the 9 inch prop. Depending on the weiught and aerodynamics of the model, the 9 inch prop (with higher pitch) might make it go faster at full throttle than the 10 inch. Since the planes are trainers, thrust is probably more desireable than speed.

I think I may know what I am going to order but how bout some opinions or recommendations before the order is placed:
Eflite Park 400 outrunner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9x4 electric prop
Eflite Park 450 outrunner for Electric J3 cub . . . . . . . . . . . . . . . . 9x6 electric prop
GMS2000 .32 for Kadet LT-25 . . . . . . . . . . . . . . . . . . . . . . . . . . 10x4
O.S .40 LA for Tower Trainer 40 . . . . . . . . . . . . . . . . . . . . . . . . . 10x6
Maxnum XL .25 for Kadet Seniorita . . . . . . . . . . . . . . . . . . . . . . . 9x4 0R 9x5 (WHICH ONE WOULD BE BEST?)
ASP .46 for Kadet LT-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11x4 OR 11x5 (WHICH ONE WOULD BE BEST?)
AXI Goldline 2826/12 electric for Lanier ST-40 Super Trainer . . . . . 13x10 electric prop (gonna have to get bigger wheels)

I also have 2 1/2A models I need props for:

.065 . . . . . . . . . . . . . . . . . . . . . . 6x3 OR 6x4
.10 . . . . . . . . . . . . . . . . . . . . . . . 7x4 OR 7x5

These are only a guess really of what I should get according to what I have seen in charts. I would really appreciate your thoughts on what your recommendations are.

I need more input, opinions and suggestions please. What are you using for your engines of the same size? Please share your thoughts

Thank you

I have had a SupreTigre Gs40 and an Evo .46 trainer engine on my Lt 40. On both engines I switched from a 10x6 to a 11x5. I found this helps a lot on landings, slows the plane down, and it doesn't float so bad.
The only problem I had running the bigger prop, was prop strikes, the wire gear just gives to much on landings, not to bad on pavement but not so good on grass. To solve the problem I converted mine to a tail dragger.
I agree,Sig kits are my favorite too.

ASP 46 would die with a 10x9, go with a 11x6 or 11x5 for the trainer
2826/12 on 3S would be able to handle up to a 14x8, 13x6 would be good

I have a 13x10 electric prop on hand that I could use for my Lanier ST-40. But then I would need bigger wheels. Would 4" or possibly even 5" be too big for this trainer?
So I am assuming the measurements I gave (see below) are alright. But on the .46 would a 11x4 OR 11x5 be best? On the .25 would a 9x4 0R 9x5 be best? And I am still wondering on the 1/2A planes .065 using 6x3 OR 6x4? and the .10 using 7x4 OR 7x5?

I still need more opinions and suggestions, what do you use on yours of similar sizes? Are any of my sizes listed off or are they OK?
Eflite Park 400 outrunner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9x4 electric prop
Eflite Park 450 outrunner for Electric J3 cub . . . . . . . . . . . . . . . . 9x6 electric prop
GMS2000 .32 for Kadet LT-25 . . . . . . . . . . . . . . . . . . . . . . . . . . 10x4
O.S .40 LA for Tower Trainer 40 . . . . . . . . . . . . . . . . . . . . . . . . . 10x6
Maxnum XL .25 for Kadet Seniorita . . . . . . . . . . . . . . . . . . . . . . . 9x4 0R 9x5 (WHICH ONE WOULD BE BEST?)
ASP .46 for Kadet LT-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11x4 OR 11x5 (WHICH ONE WOULD BE BEST?)
AXI Goldline 2826/12 electric for Lanier ST-40 Super Trainer . . . . . 13x10 electric prop (gonna have to get bigger wheels)

I also have 2 1/2A models I need props for:

.065 . . . . . . . . . . . . . . . . . . . . . . 6x3 OR 6x4 (WHICH ONE WOULD BE BEST?)
.10 . . . . . . . . . . . . . . . . . . . . . . . 7x4 OR 7x5 (WHICH ONE WOULD BE BEST?)

Remember that you must go about prop selection very differently when it comes to electric engines.

The prop size on an electric, will determine how much effective power you'll get out of the engine, how much flight time you get, and how your plane will fly.

Balancing all of this out, is the cause for numerous discussions in the electric forums.

There are on-line calculators available that permit you to come up with appropriate combos.

Too large a prop can burn out your ESC or motor. Too small a prop may result in an unflyable plane, etc.

Can someone answer this:

What would my .32 size come out to be? The charts I found state the following:

Alternate Propellers Starting Prop Engine Size
9x7,9.5x6,10x5 9x6 .20 - .30
9x7,10x5,11x4 10x6 .35 - .36

With the .32 being in the dead-center of these sizes which should I choose? 9x6 OR 10x6. Is this the case where the higher size prevails the same way shoe and clothes sizes are determined?

If you look in the "comments" area of this site:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDXL3
you will see their recommendation.

I would like to place my order tomorrow so this is what I have down so far, from what towerhobbies recommends:

GMS2000 .32 . . . . . . . . . . . . . . . . . . . . . . . . . . 8x6 propeller for break-in
O.S .40 LA . . . . . . . . . . . . . . . . . . . . . . . . . 11X5 propeller for break-in
Maxnum XL .25 . . . . . . . . . . . . . . . . . . . . . . . 8x4 propeller for break-in
ASP .46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11X6 propeller for break-in
.065 (WASP) . . . . . . . . . . . . . . . . . . . . . . 5.7x3 propeller for break-in
.10 . . . . . . . . . . . . . . . . . . . . . . . 7x4 propeller for break-in

Still not sure about these electric motors. This is a guess only. PLEASE HELP:
Eflite Park 400 outrunner & Eflite Park 450 outrunner . . . . . . . . . . . I have two 10x7 electric propellers on hand. Would they work for these motors?
AXI Goldline 2826/12 electric for Lanier ST-40 Super Trainer . . . . . 13x10 electric prop

Unless I hear otherwise from you all this is what I will be ordering tomorrow, so PLEASE I am still asking for suggestions so please help.

Thank you.

You need to state the weights of each plane, the battery capacity, and what you want your power ratio to be.

e.g. do you want "scale" like flight? etc.

That helps determine what prop size to use in each case.

BTW: I use an 10x6E prop on an Ultimate 3D FX using the same E-flite 400 Outrunner.

For the OS 40 LA in the Tower Trainer I would use 11x4 or 11x5. I've used both those props on my OS 40 FP, which is about the same as the LA, and they were good for trainers--kept the speed down but gave good climb-out. I've used a 10x5 on smaller faster planes with that engine, but it would also be worth trying on your trainer.

For the GMS 32 on an LT-25 I would try a 10x4 or 10x5. Even an 11x4 might work well. It will fly fine with the 9x6 because it is a very strong engine for that plane, so anything the engine will turn comfortably will work, but more diameter and less pitch will probably be more efficient. Same story with the LT-40 and the .46--anything will fly the plane, but a 12x4 might be good.

You will have slower landings and steeper climb-outs with the larger, lower pitch props. A small, high pitched prop on a big slow plane wastes energy because fuselage drag absorbs a lot of the power.

For the Magnum, I'd try a 10x4 and a 9x5 and see which you like best.

You should get a range of props because you can only guess how they will suit your engine/plane combination in the air. If you get these and do some experimenting you will find what you like:

9x5
10x4
10x5
11x4
11x5
12x4

For the .10, again, it depends on the use. I've run up to 8x4s on .10s, but a 7x4 will work in lots of applications, but so will an 8x3. Spend some money on a bunch of props--they are cheap compared to the rest of the stuff.

Jim

From what you state maybe I should try this:
O.S .40 LA . . . . . . . . . . . . . . . . . . . . . . . . . 11X5
GMS2000 .32 . . . . . . . . . . . . . . . . . . . . . . . 10x5
ASP .46 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11X6
Maxnum XL .25 . . . . . . . . . . . . . . . . . . . . . . 10x4
.065 (WASP) . . . . . . . . . . . . . . . . . . . . . . . . 5.7x3
.10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7x4

And I guess I will pick up some of the 9x5, 10x4, 10x5, 11x4 as well. But how will I know what is best? Does the pitch tell me what size is best suited? Or does the flying? I have never flown before so I don't wanna find out the hard way the prop was too small or big. Is there a way for me to determine the correct size before flying?

And for the electric I will try the props I have:
Eflite Park 400 outrunner & Eflite Park 450 outrunner . . . . . . . . . . . 10x7 electric props
AXI Goldline 2826/12 electric for Lanier ST-40 Super Trainer . . . . . 13x10 electric prop

And I would like to get some wooden props as well. What would be best, beechwood or maple?

And I will be getting some nylon/glass as well. I will need to do alot of experimenting to see what I like best and what does best for me and my trainers.

"But how will I know what is best? Does the pitch tell me what size is best suited? Or does the flying? I have never flown before so I don't wanna find out the hard way the prop was too small or big. Is there a way for me to determine the correct size before flying?"

Experience as well as trial and error is the best way. As long as you start with something that is within an "acceptable range" that won't hurt the engine or hit the ground you'll be OK. As to the "perfect" prop, this depends on the plane, the pilot and the way you want the plane to perform.
For instance, (example only, don't use these numbers) for your trainer you may wish to start with an 11x4 prop because it will accelerate the plane well, have good vertical performance, not a very high top speed and will help slow the plane for landing.
As you progress with the trainer and want more speed you could switch to a 11x5 or 11x6 which would not accelerate quite as well, vertical perf would suffer somewhat, top speed would be higher and landings would be harder to slow down and require more skill.

Wood props break VERY easy, I suggest avoiding them until more experienced.

I recommend Master Air Screw MAS

APC also not very forgiving.

OK, so experimentation is the only way to go. The decisions are near endless, what I am comfortable with basically then. As stated above props are pretty inexpensive so I will order some from the range of 9x5 thru 11X6 and just experiment with'em. And as I understand it I won't know until I fly.
And what I don't use I am sure will end up on some plane as time goes.

OK, will do. Thank you, recommendation taken - I have some Master Airscrew and they are very nice products. I do have some props on the engines now but the numbers are worn off and I have no knowledge of what they are.

Tiger, I just went to the LHS today for props. I have a high wing PT 40 with an older tower .40, CG tiger 2 with ASP .46
I want to do some prop experimenting tomorrow, both tach and flying. I bought 2 of each
10x5 apc
10x6 apc
10x7 apc
10.5x5 bolle
10.5x6 bolle
11x5 apc
11x6 apc
11x7 apc
11.5x5 bolle
11.5x6 bolle
Hopefully I will get some good results, both planes come home in one piece and all my fingers are still attached.

Here is my order I just placed with towerhobbies

Master Airscrew 10x5 G/F G3 Nylon Propeller QTY: 2 @2.29EA
Master Airscrew 6x3 1/2A G/F Nylon Propeller (2) QTY: 1 @3.09
Master Airscrew 7x4 G/F G3 Nylon Propeller QTY: 1 @1.59
Master Airscrew 9x5 G/F G3 Nylon Propeller QTY: 2 @1.99EA
Master Airscrew 11x4 G/F G3 Nylon Propeller QTY: 2 @2.49EA
Master Airscrew 11x5 G/F G3 Nylon Propeller QTY: 2 @2.49EA
Master Airscrew 11x6 G/F G3 Nylon Propeller QTY: 2 @2.49EA
Master Airscrew 9x6 G/F Nylon Electric Only Propeller QTY: 2 @2.39EA
APC 13x6.5 Electric Propeller QTY: 1 @4.69

AND SOME EXTRAS
Great Planes Pro CA+ Glue Medium 2 oz QTY: 1 @6.49
Great Planes Pro CA Glue Thin 2 oz QTY: 1 @6.49
Great Planes Pro CA Foam Safe Activator w/Pump 2 oz QTY: 1 @4.49
Great Planes LiPo 11.1V 1500mAh 3S 8C Discharge Deans
Note: "Price Each" reflects price for each quantity of 2 @86.98
$20 Promotional Discount 1 -20.00


Will that be enough to start with? When I am sure they are what I want I will be ordering in bulk to stock up.