Built my Swift - now some Q's

[broke-again]

Hi all, I just finished building the swift kit tonight and must admit it all went pretty smooth. However, i did notice 3 things that bother me a little.

(1). I find that the swash & washout feel "tight" on the main shaft. (is this normal or will it loosen with use)

(2). The tail rotor control arms are held by pins, which to me seemed very loose (i applied some CA to both pin ends to play safe). Has anyone ever had a problem with the pins falling out during flight?

(3). Another "tight" issue - tail pitch slider feels a little stiff - should i add some oil or leave alone?

I still have to add electrics, but heres what i am considering.

Servos - JR 821's
Tail Servo - S9254 - i have one, never used it ( worried it may not like 6v?) If not, should i get a step down regulator like the rex 600 uses or use another servo?
Power - was hoping to Y harness 2 of my existing rex batteries (2100mah PQ (very light) 11.1v to give 22.2 - 4200mah - will this be ok?
Gyro - 401
Motor - Century 600+ or Align 600L (any other suggestions)
ESC - looking at Electron 80a
Pinion 11T

Thanks guys and any feedback is welcomed... :D

[frankos72]

2. I did't glue these and they seem fine. I only have about 15 flights now though.

On your electronics

depending on the connector you use for you batteries(S or P) you will get either 22.2 V 2100 Ah, or 11.1V 4200Ah. For this heli you should connect them in series so you can get the higher voltage(see below)

With the 600+ Motor you'll need a 9t pinion for the 22.2V batt. I don't think you can run the 600+ with 3s batts (11.1v) at least not according to my calculations. You'd need an 16t pinion to get decent headspeed on the swift and I don't know if that's even possible. (it might not mesh right with the main gear).

I'm running my tail with 401/9254 and I have a 6v rx batt so that's no problem for ya.

As for your cyclic servos, it's whatever you can afford. I'm just ruinning futaba 3004 standard BB servos. I'm also just hovering and doing some ff and figure eights. I hear when your ready for 3d that faster digial servos make the heli respond much better.

Also, if you decide to go with the 600+ I have one I'd sell you with the 9t pinion. It's only got about 12 flights on it as I changed to an 800 kv motor so I could lower my headspeed. (I don't have a meter or CF blades and I don't want to see what happens when you spin woodies too fast)

I know a guy running the standard Century 600 motor with 7s emoli and he is using the CC Phonex 80 ESC with no problems. So one might assume that the Electron 80 ESC will work too..??? I'm only drawing a logical conclusion here though as I have no expierence with the Electron 80 ESC.

[trevorz]

Hi, The CC80 and Electron 80 are 6S ESC only. I would not recommend using them with 7S, and likely you will blow them up.

You need to get an HV speed controller if you want to use the 7S packs.

If you are using 6S they will be fine. You will need to use 4 of your Trex packs to get 6S 4200. If you do that, yes that will be an ok pack. You cannot use 3S 4200 (11.1V), it would not be enough.

Regards,
Trevor.

[frankos72]

I'm guessing what trevorz is sayin is that if you used 4 trex packs, you'd first make two 6s packs by combining them in series(this doubles the voltage to 22.2). Then you'd get antother connector to connect the two 6s in parallel so you'd up the ah to 4200. What you would have would be known as a 6s2p 4200ah 22.2 lipo.

You could get by with a 6s1p (two packs parallel) but at 2100mah, your flight times would be around 4-5 min for basic hovering and ff. Even less like 3-3 1/2 minutes if your doing 3d.

[trevorz]

Hi,

Thanks frankos for clarifying. Yes that is what I was saying. I would say though a 2100 6S pack would be stressed too much (i.e. the currents would be too high for the pack). At a minimum I say you need 3500 mAh or more.

The Century 600+ motor is looking to be a good one. Give that a try, but you need the batts to go with it.

As for your other questions, the washout, swash, and tail slider, should be as free as you can. They will loosen up a bit when you run it as you 'polish' the shafts smoother. So you have 2 choices,

1. Polish the shafts now to free it up a little. Then oil and run it.

2. Oil it, and run it to see if it loosens up in a couple of flights.

I would go with number 2 as you got it built already. You need to oil these in any case.

I have not seen or heard of an issue with the pins on the tail control arms.

As for the 9254, it does not like 6V from the majority of users. You are best to step it down to 5.3 or less. Some have reported no issues at 6V, but I think it will prematurely fail on you (i.e. not right away, but will sometime).

If you are running the 600+ on 6S you will need a 9T pinion.

Hope that helps.

Regards,
Trevor.

[broke-again]

Many thanks guys, made things a lot clearer for me. For whatever reason i had figured that by simply Y harnessing two 3 cell 11.1v would give me 22.2 4200mah :arggg:

back to the drawing board!

[frankos72]

Good thing that I'm following this thread. I guess I'll take a cell out of my 6v rx pack so that I don't kill my 9254!

The batt is way cheaper than the servo, I'll mess it up before I take a chance on the servo.

[broke-again]

Align sell a step down voltage regulator. http://www.readyheli.com/K10336A_RCE_B3X_External_BEC_p/k10336a.htm

I may actually get one of these myself!

[broke-again]

Just a follow up. I did my maiden flight with the swift today and it flew really well. Strong winds too, but the swift took it all in its stride..I like this bird! :D

Im using the Electron 80, 550+motor, 10t, 4 cell, 4350mah and the align bec

[Finless]

CONGRATS on the maiden!

Bob

[broke-again]

Thanks Bob, :D you taught me all i know...... :noteworthy