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HomeAircraftHelicopterMain Discussion › Longer flight time model and setup choices
08-20-2014 03:32 PM  3 years agoPost 41
Rudy

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Houston TX/Bend OR

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Generally speaking, the lower C packs work for many of us, if not most of us, and they're lighter and sometimes smaller. they have higher energy density
Yep the Pulse battery/Goblin pilots will tell you the same thing. Most are more then happy to fly on a 45c pack vs a 65C pack. Shoot I am happy with a 35C pack.

For the question about fitting a 6S 5000 pack in a Goblin 500. I running the Pulse 35C 6S 5000 packs with the stock battery trays. They fit just fine.

Rudy Ackerman Houston TX/Bend OR

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08-22-2014 01:26 PM  3 years agoPost 42
HeliNutAndy

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worcester, MA USA

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I have a 16 tooth pinion coming today. It was the smallest one I could find on the HD site. I am currently using an 18 or the default that comes with the Goblin 500. I also have a DX9 coming because the single flight mode isn't cutting it on the DX7s and I'd like to have a couple different head speeds to test a bit. Hopefully I will enjoy the lower speed on the 500. I'm still not sure due to its small size. I also noticed that my main gear has a crack in it so I need to add the heavy duty gear which I also purchased. I hope this works out because I'd rather have a few extra minutes of flight time rather than the fast head speed.

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08-22-2014 03:15 PM  3 years agoPost 43
gwright

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Champaign Il

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Strive to find the headspeed that gives the right balance rather than just running really slow for flight time. In other words,.. if you're struggling to do things you want to do due to the low rpm, then you need to raise it and give up a bit of flight time. You'll be much happier.

For example, my 700 flies very well with 1350 and 1750 modes and does what I want, 12 to 14 minutes is normal duration. I can drop it a couple hundred rpms lower on the bottom rpm and flight times go up substantially but it doesn't feel good to me,.. so I sacrifice some flight time to have it fly well for my tastes. Others have mentioned they love that machine at 1550 but not lower. You have to determine what's appropriate for you, which may require multiple gear changes for experimentation. I fly everything far slower than most people but one of my machines (a 550 ) simply doesn't feel the way I want it when it's below 1900~2000 so it's normally flown there and I just live with short flight times(7 to 8 minutes).

Gary Wright

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08-22-2014 03:49 PM  3 years agoPost 44
Four Stroker

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Atlanta

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Hey Gary;

What would a low head speed 600 setup look like ? For say a 10 minute flight.

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08-22-2014 03:57 PM  3 years agoPost 45
HeliNutAndy

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worcester, MA USA

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Strive to find the headspeed that gives the right balance rather than just running really slow for flight time. In other words,.. if you're struggling to do things you want to do due to the low rpm, then you need to raise it and give up a bit of flight time. You'll be much happier.
I have the Spektrum telemetry module that I need to install so I can determine the head speed. I am just worried that I wont be happy with the lower head speed but time will tell

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08-22-2014 04:53 PM  3 years agoPost 46
gwright

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Champaign Il

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What would a low head speed 600 setup look like ? For say a 10 minute flight.
Just what I have now, with a couple teeth less pinion,..but I didn't like it there. Something with the combination of disk loading and rpm. I actually have a 1600 flight mode on that machine (it's a 550 stretched so 605 mains and 95 tails, 6S). I can fly it at 1700 with a smaller pinion and higher pitch and go over 10 minutes easily, I just don't like it there.
It's a raptor E550 with R50 boom/belt/boom supports, hacker 850KV "short can" turnado, 12/111 gearing on 6S. Was Ok with a 10 tooth and 1800 but not the way I wanted so I sacrificed over 3 minutes of flight time to increase it to 2000. 850KV*22.2v*12 pinion, divided by 111 main,.. equates to 2040 possible , and it doesn't get hot and doesn't really load when flown at 2000, so it's appropriately setup for that rpm and the way I want to fly. Even when running ballistic rpms like that I try to get the system setup with as little headroom as possible .

Gary Wright

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09-22-2014 12:38 AM  3 years agoPost 47
BobOD

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New York- USA

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By the time you get the electric to fly anywhere near Nitro times, it'll fly like a slug.
Not that this doesn't offer challenges or fun times but that pretty much is what you get.

Team POP Secret

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09-22-2014 02:48 AM  3 years agoPost 48
gwright

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Champaign Il

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can't make a generalization like that. It isn't true either

Gary Wright

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09-22-2014 04:00 AM  3 years agoPost 49
turboomni

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East of the Equator

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By the time you get the electric to fly anywhere near Nitro times, it'll fly like a slug.
May I ask what this statement is based on,,your past experience or suspicions? I absolutely disagree. I have been happy with my present setup ,,a 560 kv motor on an older Align 700 ,,112 main and 12t pinion on 6 cell. BUT another guy had basically the same machine and motor,, main gear but with a 13t pinion. I think head speeds went to the 1400's instead of the 1300's for me. I got an adjustable motor mount and will try a 13t pinion tomorrow. As Gary said you need to find what works for your tastes and flying style. The advantage here is you can find the perfect setup without going full bore and getting the highest flight times for your flying style and machine. I think the trick is to not be too greedy as power does corrupt and maybe delay or stop your heli piloting progress.

Setup is everything, All my heli's can fly far better than I can pilot them

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09-22-2014 05:27 AM  3 years agoPost 50
BobOD

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New York- USA

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OK, that wasn't the nicest way to describe. I'll have to think of a better word to use there.
Don't get me wrong...I totally agree it takes skill and finesse to manage your power to fly well for long duration. More than to fly something with abundant power in fact. But, as for how it flies, it is power limited...by definition in fact.
I do it all the time and have done so for years. Have used different techniques. It's challenging and it's fun and I enjoy it for what it is...an exorcise in power management. It's all good...just not sugar coated is all.

Team POP Secret

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09-22-2014 05:27 AM  3 years agoPost 51
Dr.Ben

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Richmond, VA, USA

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I agree. The statement in question has minimal basis in fact. My E820 was at Triple Tree this weekend. I flew it some and then I had a friend fly it. His comments were along the lines of "just how much vertical does this thing have? (as we watched it break our neck on uplines)" . Another current US F3C team member thought it pulled like a small block Chevy. It does all that for a good 8:30 at 1550. And on 12S no less. The vast majority of electric models are geared to provide far more power than many people need or even want, and all that does is waste flight time and make a bunch of noise. It is absurd to think that the moment you tune a model to your own needs at anything less than 7500-10,000 watts of peak power that that equates to a model with no performance. Power is not a black or white discussion. While a center stage oo-ah demo is one thing, the vast majority of sport pilots with whom I spoke this weekend have far less need for 2400rpm for 4 min and way more for 2/3 to 3/4 of that rpm for over twice that time while still doing 95-99% and the same manuevers. The knowledge base for these set ups is out there, and more and more people are tapping it.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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09-22-2014 05:45 AM  3 years agoPost 52
BobOD

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New York- USA

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Well, slugs don't fly so yeah...the basis is pretty minimal.
It flies with "controlled" power usage. My point was that Nitros can be flown as long without the need for such limiting. Not knocking electrics, I love them...just not sugar coating. I'm a meat and potatoes kind of guy...usually too full for desert.

Team POP Secret

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09-22-2014 10:42 AM  3 years agoPost 53
Richardmid1

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Leeds, England

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By the time you get the electric to fly anywhere near Nitro times, it'll fly like a slug.
I can agree with this from experience.

IF you want longer flight times fly more gently at a lower HS. It's so much fun and you won't get bored of it at all!

60% of the time, it works every time!

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09-22-2014 10:49 AM  3 years agoPost 54
Richardmid1

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Leeds, England

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The knowledge base for these set ups is out there, and more and more people are tapping it.
Basically drop 2 pinion sizes (cheap option), buy a lower KV motor (dearer option), drop pack cell count (most expensive option unless you are removing a pack and halving the voltage (way too sluggish!)).

60% of the time, it works every time!

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09-22-2014 12:12 PM  3 years agoPost 55
Ronald Thomas

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Gainesville, Fl, USA

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You have to post a vid to prove the skeptics, otherwise they continue to spread untruths...

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

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09-22-2014 12:42 PM  3 years agoPost 56
Ace Dude

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USA

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By the time you get the electric to fly anywhere near Nitro times, it'll fly like a slug.
Not that this doesn't offer challenges or fun times but that pretty much is what you get.
The OP was asking about model and setup choices. Try to stay on topic. We don't need another nitro vs. electric thread.

  

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09-22-2014 01:37 PM  3 years agoPost 57
rexxigpilot

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Florida

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A lightweight model with a reasonable head speed will get you about 7 minutes (±30 seconds) depending on how hard you fly.

I have a Logo 600 that can get 7 minutes at 2000 RPM head speed. Flight time will reduce to about 6.5 minutes if I push it hard at that head speed. A 1900 RPM head speed makes the model feel sluggish IMO even though flight time is over 7 minutes.

I think the OP's Goblin 500 will get good flight time (7+ minutes) too after the reduction in head speed via the pinion change the OP is planning.

If the OP wants to get 10+ minutes of flight out of an electric he will need to go to a much slower head speed than for what the model was designed. I know some of you like to fly these ultra low head speeds on an electric, but to me it doesn't provide the performance of a good nitro model due to the higher weight of an electric model. If you reduce battery size to reduce weight you simply get shorter flights. So, IMO a 7 minute flight is all you can reasonably get out of a typical electric model and still have decent flight performance.

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09-22-2014 01:52 PM  3 years agoPost 58
Richardmid1

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Leeds, England

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I have a Logo 600 that can get 7 minutes at 2000 RPM head speed. Flight time will reduce to about 6.5 minutes if I push it hard at that head speed. A 1900 RPM head speed makes the model feel sluggish IMO even though flight time is over 7 minutes.
I used to fly my Logo 600SX at these head speeds and only got 5.5 mins at best but that was with 3300's, maybe 3700's would have got me 6.5 but performance would start lacking with the extra weight.

I could get 8 mins with my 700 using a single 6s 5000 pack but it was hard work and boring!

60% of the time, it works every time!

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09-22-2014 02:36 PM  3 years agoPost 59
turboomni

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East of the Equator

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I could get 8 mins with my 700 using a single 6s 5000 pack but it was hard work and boring!
What was the head speed you were working with with this set up?

Setup is everything, All my heli's can fly far better than I can pilot them

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09-22-2014 02:45 PM  3 years agoPost 60
Richardmid1

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Leeds, England

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1200 max but ungoverned so anything between about 900 and 1200 at a guess.

60% of the time, it works every time!

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