Wich Props for my 41" Zonda/Carbon Cat ? (from Horracing)

[Mecka1990]

Hi guys ,

someone of you twinbuild speedfreaks know wich size prop i need for my zonda cat?

Informations about the Boat:

Length: 41" or 1050mm (excludes rudder and strut)
Width: 11 3/4" or 300mm
Motor: 2 unit x water cooled 2075KV 3674 brush-less in-runner with motor mount (no idea of the name, think is one of the TP)
Esc: 2x Swordfish 200Amps PLUS Esc. (connected them with y plug into channel 2 of the receiver, one esc is without bec cable)
Lipos: 2x 5s (one for each motor) 5000 Mah 40/80C.
Drive system: stainless steel collets, 3/16" flexi cable, brass tube, teflon lining, teflon washers, prop nut, drive dog (installed) Other accessories: antenna mount, water tubings, rudder, stinger drive
Radio: Spektrum DX2
Servo: Traxxas 2056 Servo

Both Esc´s set on:
LVC: 5 Cells
Cutoff Voltage/Cell: 2.8V
Brake Type: no brake
Timing Adance: middle
Cutoff Type: hard cutoff
Startup Type: standart
PWM Rate: 8 Khz
(optional) Trottle Range: coming if i set the throttle on the radio and receivar with failsave.


because i have no idea what size props are coming with it (getting it in the next 2 weeks i hope) i need some informations or ideas of you what i shoud mount on it for max speed and no overheating problems.
by the way, if i set the ESC´s wrong just tell me, 1st try in twincats :-(
and sorry for my english, coming from Austria, its not the yellow of the egg.

[srislash]

If I had to guess not knowing exactly which motors they are I would say start with 442's,642's and then maybe 445's. I have a Shocker 37" with TP 4082 1820kv's and it likes the 447's and 648's. BTW,most of the props mentioned are from Fightercat.Though I think HOR has them as well.

[Make-a-Wake]

x442's L + R

[Mecka1990]

from small to big, gonna do hehehe, i think the stock props that comign with it are 43mm.

ill start with 442´s, if it runs without overheating i go for the cnc copy of prather s220, and then 445´s, Horracing said the boat runs with my setup about 120km/h, im not sure with that, seeems a little bit much for this low setup, maybe with 3balded props 45mm -.-

[Mecka1990]

x442's L + R

42? not more? -.- and what a speed you give him?

[Make-a-Wake]

42? not more? -.- and what a speed you give him?

Well, you are missing one piece of information that I would like to know............motor brand, motor wind and number of poles. Until then I stand behind my 442's

[Mecka1990]

Well, you are missing one piece of information that I would like to know............motor brand, motor wind and number of poles. Until then I stand behind my 442's

thats the problem i got, i bet i get suprised if i get it -.- like a 2pole -.- (cry)

[srislash]

Are they the stock motors?Unmarked I take it.I agree with M-A-W.Just start with the 442's.That is what I did.And speaking of,if you need any,I have a full compliment from FC.I probably have no need for them so I could sell a few.Just sayin'.

Also bear in mind that a 3 blade will use more amps.

[Mecka1990]

will do but hor say stock 115km/h, thats a little bit much for a 200 amp and 2 blade 43 -.-

[srislash]

I've been running 70mph and pulling peak amps of 120 per motor.I doubt you will pull more than 80 with 443's.

Twins work together to get the speed.One motor helps the other.They will collectively pull less amps than a single setup.

Another note is that the larger the prop the worse it will turn.FYI

Any chance you have a RTR weight to go with?

[Make-a-Wake]

Remember he is wanting to run 5s Shawn................I think 442's are on the "big" end for 5s.

[Mecka1990]

i will run 8s if i get the money for the mtoros and esc´s hahaha, but this takes time :-)

lets see when i will get the boat, ordered last week friday, is not send, they must build it first :-(

[srislash]

Not knowing what the motors are,442's would be the start.Carl is right,those motors could get a little peaky amp wise at 5s.
You could play with the speed calc.It will give you some idea.Not truly accurate but an idea of speed.

[Alfa Spirit]

Make test with Graupner K42 L+R , K45 L+R , etc.. They are not expensive that will help you to find the right metal prop

[Mecka1990]

someone knows the exactly name of the stock motors of the zonda cat by horracing?

a link will be nice.