Let's talk 4S

[Nelsonisms]

So I got in 8 flights on the 300XL with the Hyperion 2216-2920kv 4S motor this weekend. Uriah, you were right on with the flight times regarding the Nanotech 1000mAh packs. I shouldn't be surprised since the results between it and the Typhoon were so close. But running at 3500-3600 RPM on the 275mm blades I'm getting about 4 minute flights coming down around 3.75V/cell. So I've had to set my timer to 3:30 to be on the safe side. I may pick up some 1300mAh packs eventually, but I'm really liking the extra power so really no complaints. It's one badass little heli now. The only thing left is to ditch the AR7200BX, but that'll have to wait for now. Good times.

[Nelsonisms]

I know this thread is about 4S, but I promised Livian I'd do one more test with the Typhoon 2215-3550kv on 3S for comparison to the Hyperion 2213-3585kv on 3S. So here it is. Both were governed to 3600 RPM which is pushing up against the edge with this setup.

The Typhoon did pretty well. It actually seems as though it was a little more efficient than the Hyperion 3585kv motor on 3S since it didn't take the batteries below 3.7V on this flight. They measured 3.73V/cell resting after the 3 minute flight, so that's good. It put out less wattage, but it still felt OK. And check out the average ripple voltage...pretty low at 0.07V. It had a fair amount of bogging under heavy load just like with the Hyperion on 3S, but it's still fun to fly at this speed if you can live with 3 minute flights.

Typhoon 2215-3550kv 14T 3S



Hyperion 2213-3585kv 14T 3S (same as above, repeated here for comparison)

[DCflyer]

Scorpion 2920 is bolted up to my machine! So much bigger than the 2213-14 wow. Just waiting on these 4S packs to get here from Canada.

[Livan75]

Originally Posted by Nelsonisms

Yeah, until they release a Goblin 280. Ok, maybe that's dreaming.

I'd get that one in a heartbeat...

[Nelsonisms]

I flew the 300 today with the 1300mAh 4S batteries, Hyperion 2920kv motor and 14T pinion governed to 3800 RPM. All I can say is MUCH BETTER. Now it's getting up there on par with my 450. I flew it for 4 minutes and the batteries came down a little over 3.8V per cell, so I'm happy with that. I should be able to get around 4:30 flights which is about what I get on the 450 with 1300mAh 6S packs.

[DCflyer]

Originally Posted by Nelsonisms

I flew the 300 today with the 1300mAh 4S batteries, Hyperion 2920kv motor and 14T pinion governed to 3800 RPM. All I can say is MUCH BETTER. Now it's getting up there on par with my 450. I flew it for 4 minutes and the batteries came down a little over 3.8V per cell, so I'm happy with that. I should be able to get around 4:30 flights which is about what I get on the 450 with 1300mAh 6S packs.

3800rpm!.....whew thats crankin'. How'd it feel at that rpm? I bet it sounds angry up there.....I guess you needed it with the 700+g I suppose.

I ran mine at 3650rpm yesterday for a maiden. Nothing really worth reporting. Just testing everything is working, breaking it all in with simply circuits. It did feel much peppier with this setup though. Like WAY more responsive off center.

How much collective pitch are you running at that rpm?

[Nelsonisms]

I wouldn't say it was too crazy. It actually feels pretty comfortable to me at that speed with 245mm blades. It feels very much on par with my 450X and X5 now. Yeah with the weight of my 300 it really needs at least that to do any kind of smack maneuvers. At 3600 it was kind of weak for doing fast elevator tic-tocs. Doable, but just not as punchy I wanted. I left the pitch at +/- 13 degrees for now. And I think I left the cyclic response on the "increased" setting. The tail is still holding on well. Not even a hint of blowing out.

[Nelsonisms]

I was just browsing AlleRC tonight and happened to notice that they have all their remaining Hyperion motors on clearance. The 2216-2920 and 2216-3350 are only $10.77 each. I just picked up a spare 4020-910 for my X5 for $22 which is normally a $129 motor.

[KiloXray]

Originally Posted by Nelsonisms

I was just browsing AlleRC tonight and happened to notice that they have all their remaining Hyperion motors on clearance. The 2216-2920 and 2216-3350 are only $10.77 each. I just picked up a spare 4020-910 for my X5 for $22 which is normally a $129 motor.

Nice find! Too bad I am not in the market for a motor.

[vtown nick]

Biased on your logs that 2920 should run great on my talon 35 on 4s I'm assuming. I want to try this on my 275mm stretch weighing already 621g on scorpion 2213-14 and pulse 1350 which flys great just is starting to be quite hard on my packs with 3 min flights.

I see you are getting a great amount of flight time on the 1300 4s pack that may be what I look into for size. How's the canopy fitment with it?

[Nelsonisms]

Originally Posted by vtown nick

Biased on your logs that 2920 should run great on my talon 35 on 4s I'm assuming. I want to try this on my 275mm stretch weighing already 621g on scorpion 2213-14 and pulse 1350 which flys great just is starting to be quite hard on my packs with 3 min flights.

I see you are getting a great amount of flight time on the 1300 4s pack that may be what I look into for size. How's the canopy fitment with it?

Should be good with that ESC. Like you said, the logs show the peaks are under 30A and the norms are around 10A. I would have stuck with the stretch if I could have figured out how to get the tail more locked in. The 4S definitely did make it feel less boggy with the stretch blades, but the tail just couldn't seem to keep up. Fortunately going back to the 245mm blades and increasing the headspeed fixed the tail issues and still has plenty of punch.

I haven't had any issues with space under the canopy with the 1300mAh 4S Nanotechs. Mine has a Lynx "protos" style canopy that I've moved the grommets back on, but that wasn't for these packs. I found it necessary to do that with this canopy using 3S packs on the Lynx frame too.

[vtown nick]

Originally Posted by Nelsonisms

Should be good with that ESC. Like you said, the logs show the peaks are under 30A and the norms are around 10A. I would have stuck with the stretch if I could have figured out how to get the tail more locked in. The 4S definitely did make it feel less boggy with the stretch blades, but the tail just couldn't seem to keep up. Fortunately going back to the 245mm blades and increasing the headspeed fixed the tail issues and still has plenty of punch.

I haven't had any issues with space under the canopy with the 1300mAh 4S Nanotechs. Mine has a Lynx "protos" style canopy that I've moved the grommets back on, but that wasn't for these packs. I found it necessary to do that with this canopy using 3S packs on the Lynx frame too.

That's awesome to hear then. At least I can just push it hard and if I peak it I'll get the beeps on landing. Or worse the dreaded soft cut in flight which this size heli isn't the end of the world.

What's your rtf weight out of curiosity? Current tail servo? Not sure if you mentioned it already forgive me if you did.

[Nelsonisms]

Originally Posted by vtown nick

That's awesome to hear then. At least I can just push it hard and if I peak it I'll get the beeps on landing. Or worse the dreaded soft cut in flight which this size heli isn't the end of the world.

What's your rtf weight out of curiosity? Current tail servo? Not sure if you mentioned it already forgive me if you did.

Mine is definitely on the heavy side. I posted some more details in this thread. But the short answer is 711g all up and 557g without the battery.

I'm running TGY-306G-HV servos all around on this heli. The BEC is putting out 7V with the swashplate servos at 200Hz and the tail at 333Hz. Lynx plastic tail blades and and Lynx 245mm main blades.

[vtown nick]

Originally Posted by Nelsonisms

Mine is definitely on the heavy side. I posted some more details in this thread. But the short answer is 711g all up and 557g without the battery.

I'm running TGY-306G-HV servos all around on this heli. The BEC is putting out 7V with the swashplate servos at 200Hz and the tail at 333Hz. Lynx plastic tail blades and and Lynx 245mm main blades.

That's pretty piggy on 245's mine is 621rtf with a pulse 1350.

Now with all those motors they are listed for 3s max, I have a Scorpion 2213-14 would it let out the magic black smoke if I put 4s to it? I've already placed the order for the Hyperian motor in the link you provided but wasn't sure if it's worth it to risk the scorpion?

[DCflyer]

Originally Posted by vtown nick

That's pretty piggy on 245's mine is 621rtf with a pulse 1350.

Now with all those motors they are listed for 3s max, I have a Scorpion 2213-14 would it let out the magic black smoke if I put 4s to it? I've already placed the order for the Hyperian motor in the link you provided but wasn't sure if it's worth it to risk the scorpion?

I'm running my Scorpion 2216-2920 on 4S no problems at all. After seeing Nelson's findings I was confident it would be fine and it is. Comes down super cool. Running it at 15 degrees timing now. Still have some tail tuning to do, but the motor system itself is tip top. Running governed 13T/136T at 3650rpm and Edge blades. My AUW with 70C 1300mah 4S TP battery and fiberglass canopy is 631g.

The 3585kv should also be able to take 4S just the same (motor winds are pretty much the same) but you're going to be spinning the motor itself at a higher RPM due to it being 600kv more than the 2920kv. And its a bit small honestly for a 600+g machine.

With 275mm blades you should have one heck of a machine on 4S. It feels great on my 253's. Yes the disk loading is a bit heavy, but it tracks perfectly even at 50+mph passes and the 4S makes up for it. I may have to swap in a 14T pinion eventually to try out 3800+rpm, but it runs so well at 3650 that i'm just going to leave it for now.

[jmtyndall]

Oops I got the 1000mah, hope flight time is decent

[Nelsonisms]

Originally Posted by jmtyndall

Oops I got the 1000mah, hope flight time is decent

I got two 1000s to start with and was getting about 4 minutes with those. It's just with all the Lynx parts mine was a bit tail heavy so adding the 1300s helped to balance it out and add a little flight time. I didn't mind because I can use the 1000s for both the 300 and as backup power for my FPV ground station.

[vtown nick]

Just finished my rebuild and installed the 2920 with a 13t pinion. Currently it's on 3s till my 4s packs get here. It's stealth quiet at the current head speed it's pretty cool.

Can't wait to test it out soon!

[Nelsonisms]

Oh yeah...it's on! Hehe that looks sweet.

[jmtyndall]

I got my motors, and esc yesterday. Batts and servos came today. Have a kbar and sat waiting. If only my heli would show up