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Old Dec 09, 2012, 02:51 PM
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Originally Posted by bryansifsof44 View Post
+1
But unless you increase resolution like you are... I think it is highly possible you will experience blowback with the 7235s on high speed rolls.
well, yeah, getting bevel to bevel at 80% was kinda surprise... im just not sure if i will not be to lasy to redo aeleron links before tuesday...

but why would those 7235 servos be... bad? at 7.4v they are rated as 4.40kg-cm, the same as 5245... at a blistering 0.08sec...

but granted, i wouldnt put them at mxs or laser...
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Old Dec 09, 2012, 06:03 PM
aka ECAA3D
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United States, WA, Olympia
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Originally Posted by Aeroplayin View Post
I had three ExceedRC motors... the Monster series. Had a 46, 110, and 160. The 46 and the 110 are still in the airplanes even though we don't fly them anymore... a Sig we use as a camera platform, and a H9 Frenzy that was my first electric conversion from a Saito 125.

The 160 threw magnets from day-one. They were supposed to be the E-flite knock-offs, I guess. I think the Tucon or the Rockets are the second generation of the Monster. A 465Kv with a 16x8 on 6S is certainly a good power setup, so if the motor holds up, it may be an inexpensive option. If not, a second motor means you should have bought the Motrolfly or the Torque from the beginning. This is why I don't do cheap motors anymore. They are never cheap, and you never get over the trust thing. It's like you are always waiting for the time that they go bad. We have been pounding the Motrolfly 480 for a year now.

.

The rocket motors are solid compared to the old monster motors. The motor I learned to 3D on is still as solid as the day I got it. Been nosed in a few times

I would go with this motor on 5s 4000mah with a 16x8 prop.
http://www.hobbypartz.com/86mc451-4120-515kv.html
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Old Dec 09, 2012, 06:08 PM
aka ECAA3D
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Originally Posted by rimaarts View Post
well, yeah, getting bevel to bevel at 80% was kinda surprise... im just not sure if i will not be to lasy to redo aeleron links before tuesday...

but why would those 7235 servos be... bad? at 7.4v they are rated as 4.40kg-cm, the same as 5245... at a blistering 0.08sec...

but granted, i wouldnt put them at mxs or laser...
The 5245s are like 76oz or something like that on 6v. Apparently people are getting blowback on 4.8v at 60oz. This would only be for full speed walls and full speed downlines to blenders. Stay away from those and you should be fine.

Walls are overrated in my opinion anyways.
7245s are solid as a rock and are fast enough. You'll be impressed if you are coming from a 5245.
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Old Dec 09, 2012, 08:12 PM
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United States, AK, Anchorage
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I thought they were something like 61oz/in at 7.4volts compared to 76oz/in with the 5245 @ 6volts. Run them at 8volts with a BEC and they will really be fast and probably stronger then the 5245s.
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Old Dec 09, 2012, 08:21 PM
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The 5245 are rated 76 oz/in. on 6V
7235 are faster but are 61oz/in. on 7.2V
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Old Dec 09, 2012, 10:29 PM
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United States, SC, Pawleys Island
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Originally Posted by Liberty10 View Post
The 5245 are rated 76 oz/in. on 6V
7235 are faster but are 61oz/in. on 7.2V
Not strong enough

Are they rated for HV? If so then they may work for you at 8 volts
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Old Dec 09, 2012, 10:33 PM
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Yes they at HV
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Old Dec 09, 2012, 10:52 PM
aka ECAA3D
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Quote:
Originally Posted by bryansifsof44 View Post
I thought they were something like 61oz/in at 7.4volts compared to 76oz/in with the 5245 @ 6volts. Run them at 8volts with a BEC and they will really be fast and probably stronger then the 5245s.
Yeah but why screw around with chancing it? The 7245s are a LOT faster than the 5245s. Forget the numbers you can see it physically even at 6v. The find their position faster even back to center and should be all you need in terms of speed and resolution without chancing being underpowered.

The Holmans were running 3421s and they are pretty slow.
Extreme Flight 60 Extra 300 EXP.m4v (7 min 31 sec)
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Old Dec 09, 2012, 10:59 PM
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I was replying to a gentleman... I use the 7245s all around at 8.2volts regulated and haven't looked back with we'll over 100 flights
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Old Dec 10, 2012, 07:00 AM
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Is anyone using a separate 2S battery to power the 7245's if so what capacity pack are you using and how many flights do you get on a charge?
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Old Dec 10, 2012, 10:17 AM
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Originally Posted by Ohio AV8TOR View Post
Is anyone using a separate 2S battery to power the 7245's if so what capacity pack are you using and how many flights do you get on a charge?
I run the 7245īs in my 60" extra on a 2S Gens Ace 450mAh. I usually put approx. 100mA back in after one flight (6,5 minutes).

Greetings from Germany

Marcel
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Old Dec 10, 2012, 10:20 AM
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Originally Posted by mp.stumpy View Post
I run the 7245īs in my 60" extra on a 2S Gens Ace 450mAh. I usually put approx. 100mA back in after one flight (6,5 minutes).

Greetings from Germany

Marcel
Thanks Marcell. So do you change it out every flight or squeeze 2 flights with it? Is it un-regulated?
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Old Dec 10, 2012, 11:34 AM
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Originally Posted by Ohio AV8TOR View Post
Is anyone using a separate 2S battery to power the 7245's if so what capacity pack are you using and how many flights do you get on a charge?
I've used a BEC at the moment at but ran it up to 7v. Only about 8 flights so far though.
No issues but I'd feel better with a 750-1000mah pack in there and is what I plan on using as soon as the weather clears up here a bit.
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Old Dec 10, 2012, 12:16 PM
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Originally Posted by Ohio AV8TOR View Post
Thanks Marcell. So do you change it out every flight or squeeze 2 flights with it? Is it un-regulated?
Hey,

since i didnīt knew what the consumption will be i started to swap them with the main batteries... i just stayed with that. I have the same amount of 2S and 6S so i change every flight, itīs not that much work

Yes i run them unregulated.

Marcel

www.stumpy3d.de
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Old Dec 10, 2012, 12:53 PM
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On a bigger plane (50cc size) with higher torque JR servos (380 oz./in) we use an average of just under 30mAh/min on each of two redundant batteries to an AR9100 Rx. This means that one 450mAh battery has a safe capacity of 360mAh, and so I would feel safe flying it about 6 minutes. 360mAh divided by 60mAh per minute equals 6 minutes.

If Marcel is using 100mAh in 6.5 minutes, then he is using 15.4mAh per minute, so using 360mAh of the 450 battery will take about 23.4 minutes, or 3 safe 6.5 minute flights.

I am now using one 2100mAh 2S Lipo in the 78 with five SC-1268SG servos but have no data yet, but will soon. It's 3.51 oz.
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