View Full Version : Swift with Scorpion 4020-1100
05-12-2009, 01:29 PM
I just ordered the new motor for my swift, I got the 4020-1100 as it seems similar to the century 600+ and cheaper!
I am only not so sure if running 5 or 6s on it. I dont do any 3d at the moment , I just start learning some mild aerobatics but I would like a set up that can take me to an higher level.
Has anybody tried 6s with 8t pinion?
Also ...any chance to use my 4s 4500mah on this motor?ù
05-12-2009, 03:43 PM
A 4S/4500 pack of 20C or better rating will work fine. But a 9T pinion would give a very low rotor speed. With an 1100KV motor, I would suggest going to at least a 12T pinion and adjusting the ESC settings for the head speed you want. At a good 1700 to 1600 rotor speed you will get good sport flying response and still get 8 minute flights.
If you want hot performance you can go up in pinion gear (up to 14T for a 2150 or so head speed) with that 4S pack, but your flight time will go down to about 4.5 minutes.
Going to higher voltage packs (5S or 6S), with pinions of fewer teeth, will allow you to go to similar head speeds but with longer flight times.
I found the bearings in the Century 600+ were better, so their motors lasted longer under heavy 3D loading.
05-14-2009, 05:46 PM
Thanks! I think i am going to try with the 6s option, to keep the flight time the longest and the amps the lowest
05-15-2009, 11:30 AM
Supposedly the 8T pinion is not very good. You could use the 9T on 6S though. I have the 4020-910 on 10T/6S with good results so far.
05-16-2009, 03:16 PM
8T pinions should not even be made. There isn't enough material to surround a 5mm shaft. I broke 3 in a row. They all broke in the same spot. The metal is paper thin around the shaft.
05-17-2009, 08:55 AM
Thanks! I ll go the for 6S with 9t pinion.
Looking for 6s lipos i have found 4000 and 5000mah option at HobbyCity,
The 5ah is about 750gr ,will it be too havy for the swift? I really want to get the longest flight time possible.
05-17-2009, 10:18 AM
6s4900 at Hobbycity is what I use. 742 g and well worth it.
http://www.helifreak.com/album.php?albumid=1994&pictureid=14410 I had this pipe bender shoved through the skids and tached the head while it was pulling up to get a close hover rpm. I accidently picked it up. 10 ' . Like it wasn't there. Whats a few grams??? I could have done 3 D if it was solidly attached. Don't worry too much about the weight. Larger blades, 530,550,560's will make that heli fly much bigger than it is too.
05-17-2009, 10:42 AM
IMPRESSIVE!!!!! that Swift rocks!!!
I see you didnt upgrade to the metal blade grips, are the plastic ones ok with that size blades?
I just red just plane Chris accident :shock::shock:
Also ...how long can you fly with 5ah pack....lazy flying and 3d?
05-17-2009, 11:23 AM
Surprisingly I haven't had a grip fail. I even had some of the earlier thinner plastic grips on this swift, recently, and no failures to date. Hi revs and they still hold up
05-18-2009, 02:47 PM
I have over 250 flights on my 6S/4500 powered Swift, turning at a hair under 2200 using the stock plastic grips and no problem.
But if you crash at that rotor speed you will probably break the plastic rotor hub of the Swift 16.
05-18-2009, 03:37 PM
I should have added that I am running the metal hub . The blade grips act like a fuse and shatter on a hard strike. A good ground strike, say in an auto and you tip over, will tend to break grips but spare the main shaft. I don't think I'd run the plastic hub that fast myself.
05-19-2009, 06:33 PM
A couple of weeks ago Just Plane Chris was flying his 10S A-123 setup and a blade bolt pulled thru the plastic grip and his headspeed wasnt that high..I dont think.
I have had a metal center hub for a while and
I have just recently upgraded my plastic grips as I have speeded up my headspeed to about 2050 and 2150.
05-19-2009, 07:26 PM
I ran the thinner, original, blade grips that were meant for 3mm bolts at high speed and got away with it. I am NOT recommending this to any others, just my luck. The newer part is thicker through most every section and is now a 4mm bolt. On occasion I have had near 100 flights on such newer grips and not had noticeable wear. The 101st is, of course, not a grip failure but pilot error(s) every time !
05-20-2009, 08:36 AM
I tend to think my blade grip failure was a fluke. They were old grips (2+ years old) with lots of flights. Also, I'd recently switched to Mavrikk G5 Pro 'ultra rigid' blades which are very stiff and quick, so they no doubt put more torsional loading on the grips than stock.
Whatever the cause, it was a spectacular end to the Swift.