2 Blade propeller vs 3 Blade propeller

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2 Blade propeller vs 3 Blade propeller

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Viewing 16 posts - 1 through 16 (of 16 total)

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10 September 2022 at 12:03 #101960
Cecil Webb
Participant
@cecilwebb96087
Hi,

Which one is best 2 Blade Propeller or 3 Blade Propeller?

Plz tell from your experience.
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10 September 2022 at 12:03 #4826
Cecil Webb
Participant
@cecilwebb96087
10 September 2022 at 12:40 #101961
Colin Bishop
Moderator
@colinbishop34627
Hi Cecil,

It depends on what type of model you are running! We need a bit more information.

Colin
10 September 2022 at 13:03 #101962
Richard Simpson
Participant
@richardsimpson88330
Cecil, so many other variables need taking into consideration depending on the use or type of model it is powering. Just a couple to think about, there is pitch, diameter and blade shape as well as number of blades. All lend themselves better to a specific use. As Colin says we would need to know more about the type of model you are considering.
10 September 2022 at 19:37 #101965
neil hp
Participant
@neilhp
if you are thinking of a tug or a trawler, then a 4 blade prop with course pitch is the choice for torque and towing power.
10 September 2022 at 21:02 #101966
Chris E
Participant
@chrise
is this for your styrene Sarik Whaleback?
11 September 2022 at 09:05 #101972
ashley needham
Participant
@ashleyneedham69188
….if it is, and you use the 400 motor, a cheap “ordinary” S35 two blade plastic prop would do. Not the X variety (with a very corse pitch).

I find the three blade plastic props have a very poor reverse being very low pitch, although a 35mm one would likely be ok speed wise. Get one of each…they are very inexpensive!

Ashley
11 September 2022 at 09:59 #101975
Chris E
Participant
@chrise
Ashley

I am surprised. What voltage are you expecting would be used? I would have thought that an S35 was overpropped for a 60gm 1667kv Mtronics M400 brushed motor.

Edited By Chris E on 11/09/2022 10:01:14
11 September 2022 at 11:04 #101976
Cecil Webb
Participant
@cecilwebb96087
For considering Pro Boat Recoil 2 26"
11 September 2022 at 11:46 #101977
ashley needham
Participant
@ashleyneedham69188
Chris. 7.2V. this is what I have fitted to all my speed 400 motor/boat combinations really….it the Mtronics one a bit weedy??? i sort of assumed the Mtronics one was on par for a 400 .

In point of fact i dont think you can get 30mm s types now which is a shame.

Googling a pro boat recoil 26 inches comes up with quite and expensive brushless boat type????

Ashle
11 September 2022 at 12:50 #101978
Ray Wood 3
Participant
@raywood3
Hi Cecil,

Forget a 400 brushed motor for the Pro Boat, It would be like Driving with Miss Daisy, go 2 blade prop with a brushless motor & Lipo like the ready to run version is fitted out with is the way to go

Regards Ray
11 September 2022 at 12:57 #101979
Chris E
Participant
@chrise
Ashley

I was not thinking that the Mronics was weedy but rather that is would be overloaded. I don't like my motors to run hot! You obviously know that it will be OK. I have never built a planing model so please ignore me.

I suspect that the reference to the Pro Boat is because it is a similar size and thus could help with motor selection. Unfortunately the Pro Boat is a 35mph high speed model that uses a 4335 brushless 2300kv on 3S and uses a 100A Esc. This is surely way over the top for this model.
11 September 2022 at 13:25 #101980
Chris E
Participant
@chrise
Ashley

I have no specific knowledge of the Mtronics M400 it was just that an S35 prop sounded very large. Now I know that I am wrong. What ampage does a 2S 400 with a S35 prop draw?
11 September 2022 at 15:35 #101982
Ray Wood 3
Participant
@raywood3
Hi Cecil,

This is my Cigarette 26" long with a brushed 600 on 7.2 volts & 35mm 2 blade prop, she gets up and planes in a scale manor but is not ballistic, the hull is fairly light so not a bad comparison to the Pro Boat.

Regards Ray

Edited By Ray Wood 2 on 11/09/2022 15:37:57
11 September 2022 at 15:36 #101983
ashley needham
Participant
@ashleyneedham69188
Er…no idea! However, although they get warm, they don’t get hot and neither does a 15A viper esc.

Strictly speaking it probably is a bit overloaded, but the motor seems to manage ok. I will try and remember to get a wattmeter on one next time…although they are few and far between now.

Ashley
12 September 2022 at 11:23 #101996
Cecil Webb
Participant
@cecilwebb96087
Posted by Ray Wood 2 on 11/09/2022 12:50:10:

Hi Cecil,

Forget a 400 brushed motor for the Pro Boat, It would be like Driving with Miss Daisy, go 2 blade prop with a brushless motor & Lipo like the ready to run version is fitted out with is the way to go

Regards Ray

Thanks Ray for your worthy information. It will help me a lot.
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