SF Prop Question

[TexasTeacher]

OK so the props that come with the FT power pack is a 10X4.7SF by APC
my local hobby store not have that one

They have a 10X3.8 and like a 10X5 will either of those work or do i just need to order props online?

 

[Snarls]

Are the ones at the shop also slow fly? They should work but the 10X5 risks overpropping and the 10X38 will just give you a little less power. The 10X5 is just a hair over 10X4.7 though so I would try that out for the closest match.

I did just read your post about your power pack C motor overheating and wonder if you can get something in the 9" range to test out instead. If a 1047 overheats the motor a 1050 will be worse.

Edit: Just realized that that thread was by member TexasPilot71 not you TexasTeacher. But if his motor threatens to overheat I would still be cautious with yours.

 

[PhenomPilot]

The 10x3.7 will lower the amps and keep the motor cooler at the cost of a little speed. The 10x5 will probably over heat the motor unless you trim it down a little to make it closer to a 9x5.

 

[TexasTeacher]

Are the ones at the shop also slow fly? They should work but the 10X5 risks overpropping and the 10X38 will just give you a little less power. The 10X5 is just a hair over 10X4.7 though so I would try that out for the closest match.

I did just read your post about your power pack C motor overheating and wonder if you can get something in the 9" range to test out instead. If a 1047 overheats the motor a 1050 will be worse.

I am not having over heating issues

 

[endfim72]

Texasteacher,
When did you order your power pack? I just received mine last month. Another member and myself can't swing a 10" prop without quickly overheating.

 

[jamboree1]

Is it my imagination or does FT always include the biggest prop the motor can swing? Bigger is not always better, anyways you can easily go down to a 9" prop, choose a 9x4.7 SF prop to go slow and have low speed thrust, or a 9x6 if you want to go faster but loose that low end thrust

 

[Craftydan]

Is it my imagination or does FT always include the biggest prop the motor can swing? Bigger is not always better, anyways you can easily go down to a 9" prop, choose a 9x4.7 SF prop to go slow and have low speed thrust, or a 9x6 if you want to go faster but loose that low end thrust

Not your imagination and bigger isn't always better . . . but underpropping also means your motor is heavier than it needs to be -- you could have gone with a lighter motor for that power, but that means buying another/different motor. Tradeoffs.

That being said, the power draw from a 10x4.7 will be nearly the same as a 9x6 . . . and by "nearly", I mean the 9x6 will draw slightly *more* power.

 

[TexasTeacher]

Texasteacher,
When did you order your power pack? I just received mine last month. Another member and myself can't swing a 10" prop without quickly overheating.

endfim72,

I ordered mine on March 6th, 2015 from altitude hobbies. It would be the B Power pack, but it is not available yet thru FT.


http://bit.ly/1EdVYVm

 

[TexasTeacher]

OK all i am officially an idiot, well i was before but this just makes it worse, i failed to read, i assumed it was a 10X4.7 sf prop.

According to the order i placed and the broken props here next to my desk that are 9X4.7 Props.

yeah you know reading, who needs it..... yeah:black_eyed: