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0nemildot · 05-22-2016, 12:07 AM

Hello all,

Recently purchased a complete airframe from the classifieds.

760kv Pmax with Quattro head and 600mm blades.

Coming with Pulse 35c 4500's.

Will be initially doing sport flight as I am coming from a 230s

What packs are you all running for capacity, weight, and fit?

Thanks in advance,

Chris

jbeech · 05-24-2016, 05:34 AM

Chris,

The batteries you have are OK for hovering and flying around but 35C is not really good enough for aggressive flying in my opinion. Not with a bigger bird. Believe me, after a 230S this is going to be an eye opening experience. Just be careful because you're dealing with a lot of horsepower and mass in comparison. Bottom line? This is not a toy. Respect it and you're in for a lot of fun.

As for batteries, think of it this way; if you compare a charged battery to a 5 gallon bucket full of water, the 35C is like draining it through a 1/2" hole. A great stream, but with a 1" hole (50C) you're going to see a significantly stronger stream 'and' it's also going to drain faster. Extend the analogy a little and a 70C is like having a 2" hole. If you're taking a camping shower and have the bucket suspended above you, that 1/2" hole is fine but if you're putting out a fire, you'd rather have the 2" hole.

Same thing with trying to drain electrons from a pack where the higher the C -rating, the better when you're making strong demands. The Quattro in particular loads the rotor head a lot more than a 2-blade rotor head and thus, especially benefits from a higher C-rating pack. Thus, without question, you're going to notice a significant difference between a 35C amd a 70C battery pack.

Note; packs these days are often rated with something like 35-70C where they liken a burst to 70C and the assumption is the 35C is continuous. This is just marketing, it's a 35C pack for everyday purposes. Everything depends on how you're going to drain the pack and even if you're not going to fly aggressive 3D, I bet you'll get a rush from lifting off and climbing like an express elevator and this is exactly the kind of maneuver where the difference between a 35C and a 70C pack is very telling.

All this said, you got an outstanding deal on that machine (I would have bought it back myself for that price had I known). Add to it the fact you received a battery pack makes it more like a gift. My advice? Go fly and count your blessings. Later, if you decide you need more packs, then just measure the space where you want to put the battery and buy accordingly because they always give dimensions.

Last thing, that motor is 720Kv.

helihammer · 05-24-2016, 08:25 AM

I bought myself a pair of Glacier 4S 5000 mAh 45C packs and they have served me well so far. I built the stage II e-conversion with a 630 kV PMax motor using the "high mount" radio tray in the rear and the carbon fiber plate between the skids. I put one battery between the skids and the other underneath the front radio tray (that has been flipped upside down). This makes it easy to adjust the CG. The receiver wrap John sells is a great way to secure the batteries; attach the foam with some 3M 77 adhesive and use the velcro strap to hold the battery in place.

I don't know the all-up weight, but I can get about 8 minutes of gentle flying with the head rotating at 1600 rpm.

You will definitely find this machine to be a different animal if you've only flown a 230S. Even if it's not the most flashy thing out there, (who wants that anyway?) the Pantera is a great machine. Like John suggests, treat it with respect. The rotor doesn't discriminate; it will slice through you the same way it does air!

0nemildot · 05-25-2016, 11:17 AM

John and KB3TUO,

Thanks for the insights. The fact that this is a big bird is not lost on me. I watched a Goblin 700 spool up at a LHS and my first thought was to hide behind something! The second thought was, I HAD to go bigger. Safety first and fun second.

I will take the advice to run higher C rated packs. Coming from planes and single packs, it never really dawned on me to pay close attention to the dimensions of the packs. Great, obvious suggestion.

And yes, I goofed on the motor kv.

05-22-2016, 12:07 AM	#1 (permalink)
0nemildot Registered Users Join Date: May 2016	P6e 8s Battery sizes Hello all, Recently purchased a complete airframe from the classifieds. 760kv Pmax with Quattro head and 600mm blades. Coming with Pulse 35c 4500's. Will be initially doing sport flight as I am coming from a 230s What packs are you all running for capacity, weight, and fit? Thanks in advance, Chris

05-24-2016, 05:34 AM	#2 (permalink)
jbeech Registered Users Join Date: Jul 2005	Chris, The batteries you have are OK for hovering and flying around but 35C is not really good enough for aggressive flying in my opinion. Not with a bigger bird. Believe me, after a 230S this is going to be an eye opening experience. Just be careful because you're dealing with a lot of horsepower and mass in comparison. Bottom line? This is not a toy. Respect it and you're in for a lot of fun. As for batteries, think of it this way; if you compare a charged battery to a 5 gallon bucket full of water, the 35C is like draining it through a 1/2" hole. A great stream, but with a 1" hole (50C) you're going to see a significantly stronger stream 'and' it's also going to drain faster. Extend the analogy a little and a 70C is like having a 2" hole. If you're taking a camping shower and have the bucket suspended above you, that 1/2" hole is fine but if you're putting out a fire, you'd rather have the 2" hole. Same thing with trying to drain electrons from a pack where the higher the C -rating, the better when you're making strong demands. The Quattro in particular loads the rotor head a lot more than a 2-blade rotor head and thus, especially benefits from a higher C-rating pack. Thus, without question, you're going to notice a significant difference between a 35C amd a 70C battery pack. Note; packs these days are often rated with something like 35-70C where they liken a burst to 70C and the assumption is the 35C is continuous. This is just marketing, it's a 35C pack for everyday purposes. Everything depends on how you're going to drain the pack and even if you're not going to fly aggressive 3D, I bet you'll get a rush from lifting off and climbing like an express elevator and this is exactly the kind of maneuver where the difference between a 35C and a 70C pack is very telling. All this said, you got an outstanding deal on that machine (I would have bought it back myself for that price had I known). Add to it the fact you received a battery pack makes it more like a gift. My advice? Go fly and count your blessings. Later, if you decide you need more packs, then just measure the space where you want to put the battery and buy accordingly because they always give dimensions. Last thing, that motor is 720Kv. __________________ John Beech - GM (and janitor) www.promodeler.com 407-302-3361 AMA # 47381, IRCHA #745

05-24-2016, 08:25 AM	#3 (permalink)
helihammer Registered Users Join Date: Apr 2014	2 Glacier 4S 5000 mAh I bought myself a pair of Glacier 4S 5000 mAh 45C packs and they have served me well so far. I built the stage II e-conversion with a 630 kV PMax motor using the "high mount" radio tray in the rear and the carbon fiber plate between the skids. I put one battery between the skids and the other underneath the front radio tray (that has been flipped upside down). This makes it easy to adjust the CG. The receiver wrap John sells is a great way to secure the batteries; attach the foam with some 3M 77 adhesive and use the velcro strap to hold the battery in place. I don't know the all-up weight, but I can get about 8 minutes of gentle flying with the head rotating at 1600 rpm. You will definitely find this machine to be a different animal if you've only flown a 230S. Even if it's not the most flashy thing out there, (who wants that anyway?) the Pantera is a great machine. Like John suggests, treat it with respect. The rotor doesn't discriminate; it will slice through you the same way it does air!

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05-25-2016, 11:17 AM	#4 (permalink)
0nemildot Registered Users Thread Starter Join Date: May 2016	John and KB3TUO, Thanks for the insights. The fact that this is a big bird is not lost on me. I watched a Goblin 700 spool up at a LHS and my first thought was to hide behind something! The second thought was, I HAD to go bigger. Safety first and fun second. I will take the advice to run higher C rated packs. Coming from planes and single packs, it never really dawned on me to pay close attention to the dimensions of the packs. Great, obvious suggestion. And yes, I goofed on the motor kv.

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