I was wondering if anyone out there knows which of these two motors (ARC 28-58-1 or MEGA 16-40-1) would be best suited for a 70mm setup running 6s?

Thank you all for your time!

Or how about just ARC vs MEGA in general? Which is better?

Depends on what criteria you are comparing them on?

If I couldn't afford a Mega, I would buy an ARC

If I wasn't worried about bending or breaking shafts, I would buy an ARC

If I wasn't worried by the end shield coming loose from the casing and eventually having to drill and pin to secure them myself, I would buy an ARC.

If I'm not worried about having a wide range of kV's to choose from, I'd buy an ARC.

Frankly if you can't afford the cost or the wait for a Mega, I would suggest you look at HET's before you consider an ARC.

Hope this helps!

Regards
Peter

Originally Posted by Peter M

Depends on what criteria you are comparing them on?

If I couldn't afford a Mega, I would buy an ARC

If I wasn't worried about bending or breaking shafts, I would buy an ARC

If I wasn't worried by the end shield coming loose from the casing and eventually having to drill and pin to secure them myself, I would buy an ARC.

If I'm not worried about having a wide range of kV's to choose from, I'd buy an ARC.

Frankly if you can't afford the cost or the wait for a Mega, I would suggest you look at HET's before you consider an ARC.

Hope this helps!

Regards
Peter

Helps alot!Thank you! So ARC's aren't very high in overall build quality...I'm new to EDF so I thought ARC and MEGA were on par with each other.

Just to clarify, what I mean by "better" is:

1. Which has higher quality
2. Which will withstand being run harder, and run above their specs
3. Which runs more efficiently
4. If two motors with similar ratings were (such as the 16/40/1 and 28-58-1) were run in identical setups, which would give the most output?
-I understand that the ARC 28-58-1 has a higher kv (3180) than Mega 16/40/1 (3150kv) but when put under load, which would be closer to it's kv rating?

Originally Posted by xTIBSx

Just to clarify, what I mean by "better" is:

1. Which has higher quality
2. Which will withstand being run harder, and run above their specs
3. Which runs more efficiently
4. If two motors with similar ratings were (such as the 16/40/1 and 28-58-1) were run in identical setups, which would give the most output?
-I understand that the ARC 28-58-1 has a higher kv (3180) than Mega 16/40/1 (3150kv) but when put under load, which would be closer to it's kv rating?

1. mega has higher quality, but the arcs are of high qaulity. Mega's generally run 1.5-2times the cost of an equal ARC motor, so not exactly a fair comparison.

2. The mega

3. the mega

4. the mega.


The mega is more efficient, can generally handle more power, and because of it's efficiency, would prolly turn the fan at more RPM than the ARC.

However, the mega costs more money. and i hate to say it, but performance vs price matters, otherwise all of my aircraft would prolly be $5K turbines.

The arc's are outstanding value. A cut above anything else in it's price range. only thing that comes close for the price, IMHO, are HET's. and honestly, I would take an arc over an HET anyday of the week.

I've run the ARC's on 6S in wemo's and DS-30's and HET's. you are looking at 95-110 amps and 2100-2300 watts, depending on fan, batteries, etc.etc. Both motors are burst use only at this level.

I personally, would buy an ARC. There is NOTHING wrong with the 28-58-1 on 6S. I'll gladly give up 2-3% efficiency for 40-50% cost savings ($90 vs $150). I love all my ARC/HET combos.

here's my ARC 28-47-1 with HET fan in an HET super sniper. fun little edf:

HET Super Sniper with ARC 28-47-1 (2 min 20 sec)

Originally Posted by gundamnitpete

1. mega has higher quality, but the arcs are of high qaulity. Mega's generally run 1.5-2times the cost of an equal ARC motor, so not exactly a fair comparison.

2. The mega

3. the mega

4. the mega.


The mega is more efficient, can generally handle more power, and because of it's efficiency, would prolly turn the fan at more RPM than the ARC.

However, the mega costs more money. and i hate to say it, but performance vs price matters, otherwise all of my aircraft would prolly be $5K turbines.

The arc's are outstanding value. A cut above anything else in it's price range. only thing that comes close for the price, IMHO, are HET's. and honestly, I would take an arc over an HET anyday of the week.

I've run the ARC's on 6S in wemo's and DS-30's and HET's. you are looking at 95-110 amps and 2100-2300 watts, depending on fan, batteries, etc.etc. Both motors are burst use only at this level.

I personally, would buy an ARC. There is NOTHING wrong with the 28-58-1 on 6S. I'll gladly give up 2-3% efficiency for 40-50% cost savings ($90 vs $150). I love all my ARC/HET combos.

here's my ARC 28-47-1 with HET fan in an HET super sniper. fun little edf:

http://www.youtube.com/watch?v=aZVQe52KOn0

Thanks for the reply Pete! Yea, I'm kinda leaning toward the ARCs myself. I was just hesitant though, because of all the shaft issues ARC has (or so I've been hearing)

AWESOME VIDEO BTW!!

Originally Posted by xTIBSx

Thanks for the reply Pete! Yea, I'm kinda leaning toward the ARCs myself. I was just hesitant though, because of all the shaft issues ARC has (or so I've been hearing)

AWESOME VIDEO BTW!!

haha thanks!

The shaft issues for the ARC's are with the prop guys. I've grenaded many fans with a 28-58-1 and never had any shaft issues.

Hi,

I have a 28-58-1 in a 6S 70mm set up with about 30+ flights on it. No problems so far and I would buy another in a heartbeat.

Mickydee

Originally Posted by mickydee

Hi,

I have a 28-58-1 in a 6S 70mm set up with about 30+ flights on it. No problems so far and I would buy another in a heartbeat.

Mickydee

Sweet, I'm building a 70mm EDF. What ESC are you running and how many amps are you drawing?

Hi,

Castle 125 amp. 6S Turnigy 5000 40C batteries, (2X3 cell packs.) I have no idea on the amp draw but I set the timer for 4:30 and land with about 15-20% left in the packs.

Mickydee

If I run a 6S/4000 mah/65C LiPo to the 28-58-1/ DS30 Rotor/TJ70 Fan.How many watts will this system be producing?? 2000?? 2100??

Hi Pete... just a pedantic professor taking you (gently) to task.

The mega is more efficient, can generally handle more power, and because of it's efficiency, would prolly turn the fan at more RPM than the ARC.

Your explanations are wonderfully lucid, but the use of "prolly" for "probably" simply drives me up the wall.

And you are by no means the only one to use this term, which surely cannot be found in the Oxford or even Webster's.

Here endeth the lesson.

Cheers, Phil

Then why does effluxrc state that both the Arc and the Mega put out 5.5 lbs of thrust out of the same alloy wemo fan unit? I'll prolly get the arc when it's time to shop .