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05-06-2006, 04:03 PM | #21 (permalink) |
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Join Date: Aug 2005
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LiIons - 5.1V - 5.3V - Gearsets
Thanks for all that information David, I've just spent the last hour or two absorbing it and going around the Duralite site (for the first time).
From the Servo info you posted above would I be right in saying that if I were thinking of a Duralite 4000mah LiIon 7.4V batt with a 5.1V regulator then I should only be looking at the S9451 (i.e. the others are for 4.8V)? I notice theres a 5.3V regulator for serious Heli 3D. I've checked my GY611 spec and think its rated up to 6.0 Volts. Would 3 off S9451's on Cyclic combined with GY611 and a 5.3V regulator all work in harmony or would the 5.1V be a better idea? I'm used to NiMh's, but have no experience of LiIon's. How many flights would you normally safely achieve at the field with LiIon's before considering charging & how long would it take to recharge the battery to full approximately? Its been brought to my attention that the S9252 does have plastic gears where as the S9451 and S9255 have metal. Obviously the replacement plastic set are much much cheaper than metal gear sets. Are pilots favouring metal or plastic, or doesn't it really matter (until you mash them)?
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John 2 x Synergy N9's, Mini Titan 3D. |
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05-07-2006, 07:22 AM | #22 (permalink) |
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Thanks for everyones help through this post.
Reference the battery/Regulator/Servo situation, I think I'm going to use the Duralite 4000mah 7.4V LiIon with Fromeco Arizona Regulator and put 6.0 Volts to the Cyclic (S9451's) and 5.2 Volts to the Gyro. Should work. Trying to double check with JR that the JR DS10 synthesised Rx and 8700G servo can be operated at 6Volts though. Want to put an 8700G (currently just sitting on the bench) on the throttle.
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John 2 x Synergy N9's, Mini Titan 3D. |
05-21-2006, 11:24 AM | #23 (permalink) |
Join Date: Oct 2005
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I don't think the 8700G will take 6 volts, is rated at 4.8 in line with the JR 7000T Gyro I think.
I run my Stratus on a 5.3V HD Duralite Regulator for all servos and my Gyro. A 4.8v system will operate fine on this voltage as an ordinary 4.8v Ni-Cd or Ni-Mh pack will produce more voltage than 5.3v when fully charged. I run Futaba 9252s on the cyclic, 9254 on the throttle and a JR 7000T and 8700G on the tail. My model humps on this configuration, cyclic rates are more than enough on 9252s, especially if you dial in your bell/hiller mixing as you like it on the Fury or Stratus. I had one of the Arizona regulators in my Stratus and promptly removed it before flying, those things are physically huge in size, and I had trouble finding a decent spot for it with the Duralite pack, Gyro amp and Rev max. Bought another duralite Regulator instead! I have heard good things about the 6V setups though. That said, 6.5kg of torque from the 9252s on a 90 size CCPM system are more than enough and at 0.14secs too. Remember all 3 servos are going to be your collective and any two at least will be your cyclic control. The big servos 9.0kg and above are required when you fly the single servo pitch systems such as the Freyas and Raptors. You'll find the heavier torque Futaba servos thirsty on the battery pack but a 4000 duralite will more than last the day out!! On the subject of your Raptor, being honest, and not slating the Raptor guys because I have had the lot at some point, but when you fly a Fury or Stratus, you won't really do much with your Raptor. As suggested above, best thing to do is sell it and use the money for spares and fuel. I tend to buy a spare or two each month and build them up ahead of any little mishaps! Most of the Raptor guys don't know just how bad those models fly, even blinged out to the max, as they have tried nothing else. I couldn't stand mine anymore after I got my first Fury. You'll see what I mean when you fly your MA for the first time, trust me!! |
05-21-2006, 05:19 PM | #24 (permalink) | |
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Join Date: Aug 2005
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Quote:
I'd really like to have the two models just incase one goes unservicable and I miss a good flying day, but I take your point about how much better the MA machines fly - and that I might not 'want' to fly the Rappy anymore. One of my friends who now has a 70 Fury Expert, occasionally has a go on my Raptor 50 and comments (diplomatically) that it flys 'differently' to his machine. He thinks certain moves are harder on my machine than his and that it gets very small very quickly. Larger MA machines just look so solid in the air. I think the S9451's running at 6v will be a bit over the top but I have a habit of doing that. I'd rather have too much grunt than not enough... Can't wait to see what it's like!
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John 2 x Synergy N9's, Mini Titan 3D. |
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05-22-2006, 04:30 PM | #26 (permalink) |
Join Date: Apr 2005
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Hi,
I'm contemplating (spelling ?) getting a Stratus already have an Ion. Was very tempted to get one at Sandown but managed to keep the Credit card firmly in the wallet :mrgreen: I see they do 3 different gear ratio's I presume these are for certain engines. Can anyone tell me which motor is for which gear ratio ? I need to sell one or two heli's to fund it though, not the Ion though. but I'm in 'Aviation addict' situation not sure if I'm ready ? Simon. |
05-23-2006, 08:08 AM | #27 (permalink) |
Join Date: Oct 2005
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I am the other way round, I am desperate for an Ion-X, but the battery prices are a killer!!!
I would sell my Stratus for an Ion-X, but it would barely scratch the surface on the price of a Kit, Motor, Speed Controller and sufficient Battery Packs for a day of flying! Those things are just awesome though!! The Stratus is also awesome, I love the Fury too!! |
05-25-2006, 10:23 AM | #28 (permalink) | |
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Join Date: Aug 2005
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Quote:
I was interested in the new OS91 SZ-H (with Pump and Regulator) and was advised to go for the 8:18 :1 Ratio. You'd then run a headspeed of between 1850 and 1950 if trying to get max power out of the engine. I think this would be the same for the standard OS91 SZ-H too (same power output). [The other chaps will know more about all of this than me though!]
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John 2 x Synergy N9's, Mini Titan 3D. |
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05-25-2006, 12:56 PM | #29 (permalink) |
Join Date: Apr 2005
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I'm still deciding if i should sell the MP may regret not keeping it to fund the Stratus :?
Simon. |
05-25-2006, 03:10 PM | #30 (permalink) |
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Join Date: Apr 2004
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Simon
I would try to have a flight with the Stratus first, before contemplating selling the MP. From what I have seen, the MP has got a lot lower CG and frame height. Just on this consideration, you wouldn't be seeing any improved roll rate. I love my Stratus even that I am just in the final building stages. I have just seen it fly at a Funfly we had. The Main advantage is it's improved weight over the other Fury's. |
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