450 Head speed/pitch help

[fran11784]

Hi all, we have been playing with the mechanics on the S64 before he puts them into his fuselage. It almost seems like there's just not enough power for the 5 blade/ 4 blade tail. I'm not familiar with anything smaller then a 600 so sort of scratching my head here. Not using the governor, just a linier pitch curve and several different throttle curves. The model will not lift off. The RPM slowly bogs down. The ratio is a 11.69:1 with a 3700kv motor on 3s. I thought about less pitch and more RPM but we haven't tried that yet. Can't find any specs on the FW2835, 3700kv he has in there now. Maybe just needs a more powerful motor. Thoughts??

 

[D.O.G.]

You should try setting up the gov. How many teeth are on the motor pinion? You might have to change it.

 

[fran11784]

152-13 on the gearing. Yes, we can try the governor I guess. Originally, we were going to use the governor, but we don't know the pole count so decided not to. RPM starts at around 2200 with the governor

 

[Rackman]

could it makea differince if you reduced Battery capacity to just the one for say a 2 1/2 minute flight ?? or would that mess with the CA to much,, to still level things out ?

 

[fran11784]

We are only using one 3s for testing. The other battery is only to get the CG right while one that testing rig...

 

[Rackman]

oh..ok.. Man I gotha be Honest if it wasn't for the wieght factor. I believe you guys would have it in the bag ..

 

[D.O.G.]

We are only using one 3s for testing.

You might want to look into a 6s setup like a Goblin 380 or my Gaui X3.

 

[fran11784]

Yeah for sure a 6s setup would be nice.

 

[James M. Lewis]

We're close I can feel it

 

[buel williams]

We're close I can feel it

just a thought align 470 uses a small 6s batt. that could help with weight.

 

[James M. Lewis]

Good thought bro

 

[D.O.G.]

Good thought bro

Here are my 2 different 6s batteries. One on the left is 1250mAh that I use on my Gaui X3 and the one on the right is 3000 mAh for my 500 There's a weight difference of 268g. Just an example

 

[James M. Lewis]

Hi everyone, when D.O.G. aired Hulk Jr. on his web site was running a (2) 3 cell 2200mAh 50c setup. It had a 40amp ESC at the time. When we switch over to a Talon 60 ESC with (1) 1800mAh lipo battery, the results were not good. First of all I failed to have a fully charged battery ready and when that happen both fran and I noticed Hulk losing RPM during spooling up. Plus the governor wasn't even on. Thank you all for the advice shared on this forum, still learning. Next test will be with the two fully charged (3) cell 2200 batteries with the governor engaged. And thanks to Fran who did an awesome job on the setup, the slow spooling up is more realistic. It's been a slow process but feel the results will speak for themselves soon. Best regards, Jim