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07-09-2008 10:55 PM  9 years agoPost 1
Forced_Inductio

rrApprentice

Camrose, AB

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I am kind of at a dilema as to how i want to power my electronics on my Spectra. At firt i was planning on getting a Duralite 6.0V, but now im considering just using a 5 cell NiMH pack instead. I have a peak charger for NiMH packs, so i can charge in about an hour, same a LiPo. Is the power load going to be too much and cause a significant voltage drop, or should it be ok?

The other reason i later I want to get a Jewel charger for it, and it would be a waste of money to get a regulator Ill only use for a short period of time.

Thanks, Matt

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07-10-2008 01:59 AM  9 years agoPost 2
rbort

rrProfessor

Franklin, MA - USA

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Regulator

Sending you a PM about the regulator.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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07-10-2008 05:37 AM  9 years agoPost 3
Excalibur

rrKey Veteran

Destination: Earth

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A standard size (2400maH) pack and a Jewel generator are really all you need. The Jewel has a built in regulator to set the output voltage at 5.4VDC, so you are killing two birds with one stone. The Jewel provides all flight power for the electronics AND charges the pack while flying.

Trust me, a generator is the only way to go (plus a back-up pack).

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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07-10-2008 07:46 PM  9 years agoPost 4
j.8

rrVeteran

Denmark

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You will not regret buying a Jewel generator,
your gonna love it
When I first saw it, I thought, well that`s smart but...
I can live/fly without,
but after a crash due to low power on my battery, I got one,
and I will never fly a gasser witout.

Regards Bo

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07-10-2008 08:34 PM  9 years agoPost 5
bcook01

rrApprentice

treasure cay​Bahamas/ ont canada

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JR 3300 packs are great. 3300mah or better. Be sure to use "C" cell packs and not "AAA". SANYO make the best NICADS.

Generator is great but can be added later. Lipo not recommended. Lots of life in NIMH or NICAD packs especially if you are using analogue servos such as 9202 or similiar. Digitals suck more power. Run two switches in parrellel or a DPDT switch as these can fail with time.

Bob

It's cheaper to learn from others.

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07-11-2008 03:44 AM  9 years agoPost 6
Forced_Inductio

rrApprentice

Camrose, AB

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im running digital servos on everything, and 8717s on the swash. so i want to make sure the power system can handle it. ive got a 2100mAh 5 cell pack coming, so that should work with Rajas regulator for right now. at least until i get the gen.

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07-11-2008 04:09 AM  9 years agoPost 7
bcook01

rrApprentice

treasure cay​Bahamas/ ont canada

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2100 mah pack is a little light under the circumstances (dig servos) unless you are going to use a generator.

depends on how active you are going to be on the sticks.

IMO

Bob

It's cheaper to learn from others.

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07-11-2008 04:24 AM  9 years agoPost 8
TooBizzy

rrApprentice

Georgetown, Ohio USA

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Have you considered A123 cells? No need for a regulator especially if you get a gyro and tail servo rated for 6.0v. I'm running a 2s2p on my Predator and only regulating the tail since I'm runing a 401/9254 combination.

Your 8717 will be happy on A123's....

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

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07-11-2008 05:35 AM  9 years agoPost 9
Excalibur

rrKey Veteran

Destination: Earth

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If you are going to run a 5-cell pack as you indicate, just remember that when you add the generator you will need a different output voltage from the generator's on-board regulator.

The standard generator puts out a regulated 5.4VDC and will charge a 4-cell pack. This voltage won't work with a 5-cell (6VDC) pack. Check with Raja when you get to that point.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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07-11-2008 01:01 PM  9 years agoPost 10
TooBizzy

rrApprentice

Georgetown, Ohio USA

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The generator will still work on a 5 cell or A123 setup, but will need a special regulator made up to get the volts you require.

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

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07-11-2008 03:16 PM  9 years agoPost 11
rbort

rrProfessor

Franklin, MA - USA

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4 cell packs

5.4v with the generator are most popular with gassers. People who run higher servo voltages are most interested in hard 3d with pop equal to glow machine crazy szabo flying.

Gassers are more graceful in flight and I don't really see much benefit in running higher voltages. You can do it, but can you really tell a difference with the way you fly it?

On the other side, higher voltages may very well cause shortened life spans for electronics. Its like a flashlight bulb, run it on one extra battery it will be brighter, but will burn out sooner.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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07-11-2008 03:32 PM  9 years agoPost 12
jschenck

rrProfessor

La Vista, NE.

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I can tell you that converting from the Fromeco Arizona/5200 to the Jewel with 4 cell NiCD I was concerned about giving up the performance of 6V to the swash servos.

After 3 gallons of flying with the Jewel I can tell you that I have not really noticed a "real world" performance difference from the 6V setup. The only time I really see the difference flying is when I'm trying out the 'shakey stick' crack style flying, which is kind of silly and very hard on the equipment. My opinion is the 9351's I'm flying work just fine on the 5.3-5.4V that I'm feeding them from the Jewel and the NiCD 'capacitor'.

BTW - the Fromeco Arizona + 5200 battery is also a great setup. You could fly *a lot* on a single charge. but I do like the additional security of the generator running, it's basically two power sources for your radio gear - battery and the generator.

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07-11-2008 03:38 PM  9 years agoPost 13
rbort

rrProfessor

Franklin, MA - USA

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EXACTLY!

The only time I really see the difference flying is when I'm trying out the 'shakey stick' crack style flying, which is kind of silly and very hard on the equipment.
I'm also in agreement that the "shaky stick" is very hard on the equipment and causes premature failures. When you're a sponsored pilot it doesn't matter if it crashes every so often - I've even seen some of those guys crash on purpose to impress the crowd, but when you're not its more fun to log more and more flights rather than get frustrated with unnecessary rebuilds.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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07-11-2008 06:18 PM  9 years agoPost 14
TooBizzy

rrApprentice

Georgetown, Ohio USA

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I think that the generator IS the best way to go. But there are alternatives.

Another view-point:

I didn't go the A123 route for the "POP" and for the 3d banging of the sticks. I went with A123's because of how fast you can charge them. For about $40 I put together a 2s2p 4600ma battery that will last more than I want to fly in an evening. It only takes about 5 minutes to charge before I go to the field. My Predator is still just as graceful as I want it to be, even on the higher voltage.

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

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