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Century Radikal E640 - Swift 16 NX
› Swift16 4s1p 3700mAh 3D?
01-18-2009 04:36 AM  9 years agoPost 1
nrad2000

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USA

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I've been flying my Swift 16 (stock) for the last 2 years or so. It has the old Century 550 plus motor, Century 55/70A ESC, 2 X AirThunder 4s1p 25C 2200 mAh (parallel), 9 tooth, and stock woodies. Batteries are a bit tired (over 300 charges).

I watched Adam Turner (century web site) with a 4s1p 3700 600A motor setup. I'm not getting anywhere near that kind of head speed. is it because of my motor and pinion? If I get a 600A without the pinion change would that increase my RPM? Would the larger motor draw too much amps from my ESC to handle? How about temperature?

I've been using these batteries since the day I was learning to hover - So, I don't remember if it had more pop.

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01-18-2009 06:16 AM  9 years agoPost 2
nrad2000

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USA

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I've been playing around with some numbers.

i have 2 battery packs running parallel = 1.06lbs

I have weights in the front to balance heli = 0.26lbs

total weight = 1.32lbs

The Evo 3700 4s1p = 0.84lbs

The differance would be almost 1/2 pound. Would that make a big differance in performance? Would my current 2200mAh 4s1p 25C warm up more if I run the heli with one pack instead of parallel?

Since my battery is getting tired (over 300 charges) and I'm thinking of replacing the battery anyway - maybe it wouldn't hurt to try flying it with one pack.

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01-18-2009 03:11 PM  9 years agoPost 3
westcoastchoper

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Denton, Tx

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With the 550 motor, you might be getting 1700 rpm head speed, with new batteries.
The 600 will give you less rpm unless you change pinion. You would need a 12t or 13t like Adam Turner in the vid.

There are a lot of things that could change performance. CF blades, fast digital servos, even gear mesh.

I think yours is a combo of well used batteries and wrong pinion size. Try a 10t pinion. The 1 2200mah pack will only give you 2-3 mins of flight and might hurt the battery. I think about 3500 mah is the lowest you will want to go.

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01-18-2009 03:13 PM  9 years agoPost 4
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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I would go to 6s since you have to replace the battery anyway. Then go with the 600+ motor, 9 or 10 tooth pinion (depending on how you want the HS to be) and let 'er rip!

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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02-07-2009 10:24 AM  9 years agoPost 5
red3

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herts uk

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hi i have a swift 16 that was set up by ian contessa he uesd to fly for century uk. my set up is as follows 4s with 550+ motor stock 60amp esc and a 10t pinion with 5.15 blades this set up will 3d no problem as flown by him ! i have allso flown this with 530 blades with no problems at all

hope this helps you

red3

http://www.swift-tuning.com have a look on this web site there is allso a head speed calc on there

Trex600nsp Dragonus Elite

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02-07-2009 06:18 PM  9 years agoPost 6
cutty01

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Bay Area, CA

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www.swift-tuning.com
I have seen this link posted a number of times in other forums and in Goolge search but I cant seem to get to the right site. When I click it, it goes to some search site but doesnt mention anything about Century Swift. Can you confirm this is the right link and it still works. It may just be me :-)

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02-07-2009 06:34 PM  9 years agoPost 7
red3

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herts uk

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hi there i am sorry this seems to be a dead link at the moment i dont know it there is a problem with it or not: if you serch in google photos swift tuning you will still see some cool pics

Trex600nsp Dragonus Elite

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02-07-2009 11:46 PM  9 years agoPost 8
oldfart

rrProfessor

Vancouver, Canada

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For hot 3D you will want to turn up at a 2100 or so head speed....this takes a LOT more power then turning the same rotor at only 1700. An easy rule of thumb is that a 10% increase in head speed, will require a 30% increase in power!

These higher head speeds are required to deliver the quick cyclic and collective response needed to fly the demanding type of 3D seen in the Adam Turner videos.

Depending on the blades you use, that will require an average of 730 watts, with very short (fractions of a second) peaks in at a bit over 1285 (e.g as when you pop out of a death spiral).

So for a 4S pack to do so, you will have to gear your motor differently and then be sure that you are using quality high C rated packs (at least 20/25's) that can comfortably be drained at the high a rate that will be required.

Look at the amperage required for the average 750 watts. A good 4S pack that can deliver 14.7V under heavy load, would work out to (730/14.7) 49.65 amps.

So with a 55 amp speed contoller you are pushing it pretty fine.

With a 5S (18.4V) pack and gearing for a 2100 HS, you would only use an average of 39.6 amps and with a 6S (22.1) pack and proper gearing for the 2100 HS, you would use an average of only 33.0 amps.

As your 55A speed controler is good up to 22.2 Volts and your motor is not, I would also suggest you go to the 600+ motor and gear it for 5S or 6S use.

With 4S packs, I would feel better using the 80A ESC.

But the big advantage with the 600+ motor, is that it can be geared for use with all three packs - 4S, 5S or 6S. So it is much more versatile.

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02-08-2009 02:38 AM  9 years agoPost 9
nrad2000

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USA

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I have new plans for my swift. I decided on putting the swift into the Century 30size Long Ranger fuselage. I should start a new post on this but since I'm already here -

Is my Century 550+ motor enough to do scale flying w/ fuselage? I ordered a 4s 5000mAh 40C battery pack - originally for the pod and boom form. The battery should be here in a couple of days - I'm hoping that would work for my scale project.

Anybody with wood work experience - what kind of plywood should I use? and how thick? (to lift the mechanics to proper height for scale install) Birch Plywood?

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02-09-2009 07:03 AM  9 years agoPost 10
cutty01

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Bay Area, CA

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plywood
I can't say what thickness to use, but I would suggest baltic birch plywood. It doesnt have the voids that some of the domestic plywood you buy from the "big named" hardware stores. It also has more layers thus increasing strength. If you go to a Woodcraft or similar store you can buy it in smaller pieces than a 4' x 8'.

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02-10-2009 02:10 PM  9 years agoPost 11
Pistol Pete

rrProfessor

Seffner, FL

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local cabinet maker has more scraps than you would know what to do with them...i would use at least 5mm minimun.

post link when you start new post...thanks for sharing.

~~Enjoying the hobby one flight at a time~~

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