prop ? for bj26

[Diesel6401]

ok.. i found the markings on the prop. it is a 44x66 grim racer
man.. motor sizing is difficult.

i'll keep an eye out for a 1518.

Thanks for the help.

Regardless of whether or not its the perfect choice, that boat should absolutely fly on 4s with that 1512/2650kv. Its probably going to be too much current draw for a 120A esc, but it should be WAY faster than the stock motor. You have something dead wrong. Either the esc is incorrectly programmed, the throttle is not properly calibrated, or you have faulty parts. It should haul but with that motor.

You are correct something is dead wrong and his prop selection is it (besides motor choice not being best of course). The grim 44x66 is a lifter designed for hydros and riggers and shouldn't be used on cats. Change that prop and I bet things happen.

[JMSCARD]

You are correct something is dead wrong and his prop selection is it (besides motor choice not being best of course). The grim 44x66 is a lifter designed for hydros and riggers and shouldn't be used on cats. Change that prop and I bet things happen.

yeh... no question, also have you calibrated the esc to the tx?

[bagedtaco]

ok.. i order a couple of new props.

a m440 and what other prop should i get.

also. is there a large selection of props for a 4mm that is on the apparition?

[JackBlack26]

Throw in 2, 3S packs in parallel(total of 11V) and hang on!! I would do 2, 3200 mah packs for a total of 6400 mah. At 20C each that's 40C too so that's an advantage. Might have to try that on the one I'm building!

If the cheap, stock, 2900kv motor in my Widowmaker rips on 2S, I can't imagine how fast that 2650kv 4 pole motor would be on 3S in a tad bigger boat

[Diesel6401]

ok.. i order a couple of new props.

a m440 and what other prop should i get.

also. is there a large selection of props for a 4mm that is on the apparition?

Really depends what motor your going to go with. If you are going to use the ul1 motor then a grim 42x55 is would be a nice fit or maybe even a prather 215 (I have personnally not tried the prather on that motor), if you are going to use the 1512 cc 1800kv motor then a m445 would be a nice fit maybe even a x645 if the cc 1800 handles the m445 ok and the temps are good then you can move up. I think a m445 will work nicely though.

For the apparition 4mm issue use a shim http://www.offshoreelectrics.com/pro...?prod=ose-1030 and use 3/16 drive props. Will give you more of a selection. I have the same hull coming in the mail and I'm dumping the 4mm system for some .150 3/16 flexcables.

[bagedtaco]

let me know which .150 shaft you order. I'm gonna change mine out too. I'll order 3-4 of the listed props and try them.

[jamin]

?????????

whats the diff between a lifter prop and a standard prop?

[jamin]

got any ideas

[Diesel6401]

whats the diff between a lifter prop and a standard prop?

Lifter prop does exactly what the name says, "Lifts". They have a lot of pitch and lift the transom out of the water. 3 point hydros and riggers run on the very edge of the sponsons and pretty much the prop, the transom is normally out of the water, that's one way how the achieve such high speeds less of the boat in the water = less friction.

[Diesel6401]

let me know which .150 shaft you order. I'm gonna change mine out too. I'll order 3-4 of the listed props and try them.

I already have the shafts. They are the Miss Geico shafts. When the MG's first shipped they had the wrong direction flex cable installed from the factory, Horizon corrected this by sending everyone the proper direction flex shaft so I have 2 new flex shafts, one CW and one CCW remember you need 1 of each direction. If you are going to change out the 4mm shafts you will have to replace the bushings in the strut, you have to drill out the old 4mm bushings and replace them with 3/16 bushings.

All the props I have listed require to be sharpened and balanced before use on the boats (especially the octuras), the grim props come close, but still require attention. If you don't know how to sharpen and balance yourself Chuck here on the forum does a great job and is a pleasure to do business with. If you want to start with some CF props that don't require S&B the CF42 is just like a x442, CF45 is like a x445 and the CF48 is like a x448. The CF42 can be used with the UL1 motor and the CF45 can be used with the CC1512 1800kv motor, and if the temps check good you can very carefully try the CF48. This is until you get the other props S&B'd, metal props are going to provide better performance because the don't flex under load.

[bagedtaco]

ok.. i have the sigle motor apparition. so just need 1 flex shaft. i have a few flex shaft i can try before i order a new MG flex shaft.

[Diesel6401]

ok.. i have the sigle motor apparition. so just need 1 flex shaft. i have a few flex shaft i can try before i order a new MG flex shaft.

You don't have to buy the MG flexshaft. Buy a hugey or a octura shaft or even a wire drive. Im just using what I have for twins, it worked out better that way for me. If your using a CC 1518 or 1520, buy a bigger shaft to handle the torque like a .187 3/16 shaft

[lectriglide]

Throw in 2, 3S packs in parallel(total of 11V) and hang on!! I would do 2, 3200 mah packs for a total of 6400 mah. At 20C each that's 40C too so that's an advantage.

Not exactly correct, but it does double the available amp draw. this is taken from another thread about parallel vs series.

keithbradley-Senior Member

"Just to make sure this is clear because people ALWAYS get confused on this...
Simply put, when parallel connecting two batteries, dishcharge rate doubles, but c rating does not.
They are not the same thing, and thats what causes a lot of confusion. Discharge rate is the amount of current a pack (or packs) is capable of safely discharging. C rating is a number given to packs to help you determine what the discharge rate is. C rating never doubles. If your pack is 40C/5000mah and you run another pack of the same rating in parallel, you will have double the discharge rate (400A), but the C rating is still 40C."