help wit funjet setup

[aerorobby]

I just got a funjet with a turnigy 2700 kv motor, 40 amp ecs, and im using a 3s 11.1 v 2200mAh battery with an APC 5*5E prop, however the a/c seems to hav insufficient thrust on launch and more or less stalls out or mushes into the ground on launch.

i hav now bought a topbrand 3500kv outrunner(as it was cheap) and i hav 2 options of using either a 5*5 prop or a new 6*4 prop however i dont hav a wattmeter to check the amp usage and im scared of burning out my ecs / battery . pls help and advice... thanx

[AP 4 T]

funjet

Bro.. for 2700kv u should used 6x4 prop..

[aerorobby]

k thanx wil give that a try first!!!!

[f22]

HI Bro

I just got a funjet with a turnigy 2700 kv motor, 40 amp ecs, and im using a 3s 11.1 v 2200mAh battery with an APC 5*5E prop, however the a/c seems to hav insufficient thrust on launch and more or less stalls out or mushes into the ground on launch.

i hav now bought a topbrand 3500kv outrunner(as it was cheap) and i hav 2 options of using either a 5*5 prop or a new 6*4 prop however i dont hav a wattmeter to check the amp usage and im scared of burning out my ecs / battery . pls help and advice... thanx

Bro,where you stay/
Feel free come down to PFW n ther r some guys flying funjet can help you to solve your problem.
My setting for ultra funjet
Motor-Het 3w25 1700kv
batt-2200mAh @30c series(6s)
prop-6x4
M draw- 56.123amp
speed- fast

[CJen]

Hey aerorobby,

if you are using the hxt 2835 (380S) 2700kv brushless inrunner from HC, then 5x5 will not produce enough thrust. I have my first funjet setup was using this motor too, but have changed to APC 6x4 pusher prop. Draws abt 29 amps(max). Not a fast setup setup though......but good enough for me as a first timer on these kind of plane

[aerorobby]

hey f22, im new to singapore and wud love to join u guys. Im staying at bedok reservoir and for me tampines is the closest. im not familiar wit PFW (location).

thanx for the advice CJEN will try this setup over the weekend , i hav a strong feeling that the prop i used was incorrect. thanx for all the help, will revert back soon!!!!

[AP 4 T]

hey f22, im new to singapore and wud love to join u guys. Im staying at bedok reservoir and for me tampines is the closest. im not familiar wit PFW (location).

thanx for the advice CJEN will try this setup over the weekend , i hav a strong feeling that the prop i used was incorrect. thanx for all the help, will revert back soon!!!!

Hi aerorobby,

Me a tampines flyer too... mostly i be there on weekend evening...hope to see u there n will help you in ur funjet set up..

[Sunstorm]

5 x 5 should not produce that much thrust compared to 6 x 4 but it should still be quite decent. Have you gotten the prop on backward? The side with the numbers embossed on it should face the front. Common mistake.

[aerorobby]

lol... sunstorm.... dont worry its giving thrust backwards... just not enough

[joe yap]

He is not talking about the rotational and the thrust directions. It is the orientation of the prop. See carefully, there's a convex side and a concave side on each prop blade. The convex side should face the front with respect to the flight direction.

[aerorobby]

hi joe , i got wat he means..... it needs to be a pusher!!! all that is taken care off

[Sunstorm]

Well, 5 x 5 is a square prop which only gives more thrust when it is moving at speed.
Good luck with the 6 x 4 then

Be careful with full throttle = )

[aerorobby]

thanx for the advice sunstorm....

[rt9]

hi joe , i got wat he means..... it needs to be a pusher!!! all that is taken care off

even with the prop put facing wrongly and with the correct direction, the prop will also give a 'pusher' effect.
Just that it is not right, the power will not be there.

i had the same mistake earlier with the funjet, flyable but no power.
until i flip the prop (someone corrected me) and of course need to change the prop rotating direction (by swapping 2 of the ESC cable to the motor).. then i experience the real thrust of the pusher..

btw, i am only using a 5.5x4.5p on a 2700kV inrunner and its power !
i choose a 'p' prop because i want the typical way that the spinner is screw against the rotation of the prop :p so that it works tight again the rotation.

take a picture to show, we will understand if the prop facing is correct or not.. ;)

and here is mine.. hope the picture is visible to show the right facing..
see the numbers on the prop facing the front?

[aerorobby]

thanx alot rt9 that actually made the picture even more clear. just one other question :
when i put a 'p' prop the thrust was totally in the wrong direction so can u plz advice me as to which 2 wires from the esc did u interchange as i dont want to make any wrong connections. thanx