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Search: Posts Made By: DaveFlynn
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05-19-2011, 06:11 PM
Replies: 3
Views: 794
Posted By DaveFlynn

RE: modular lipo cells

No, but the 3 cell 2200 mAhr packs work great for that.
03-27-2011, 08:08 AM
Replies: 2
Views: 757
Posted By DaveFlynn

RE: Eflite Bonanza motor question

The stock system does work well. However, if you have some money and want to try something different, go for a lower Kv slightly larger frame motor. Mostly I use only 2200mAh 3s1p 16C packs in...
03-23-2011, 01:45 PM
Replies: 2
Views: 612
Posted By DaveFlynn

RE: need expert advice

Castle ICE HV-30, 6S1P 2200mAh (2x 3S1P), 12x6 standard prop.
Replies: 9
Views: 1,430
Posted By DaveFlynn

RE: APC props

12x8 sport w/ 4S should be nice. I fly a 12x6 w/ 6S, a bit over current on the ground, about 20 amps in level flight. Get a watt meter ASAP, if you a going to stay with electrics it's essential.
01-26-2011, 03:39 PM
Replies: 6
Views: 762
Posted By DaveFlynn

RE: Electric Conversion for a scale aircraft (Scratch Built)

The eflite power 60 is the size that will give you performance like a .46 glow engine. It's about a 4030-400. I use it with a 9S battery and 13x6 prop on an 8 pound plane.
01-25-2011, 08:38 PM
Replies: 6
Views: 762
Posted By DaveFlynn

RE: Electric Conversion for a scale aircraft (Scratch Built)

Try a 4130-380 with 12 cells. Works good with 11x4, 11x6 or 12x4. I like the Castle HV-45 and 2100mAhr LiPos. It's about the same weight as a .46 with a big muff and 12oz fuel tank when full. ...
01-13-2011, 02:52 PM
Replies: 4
Views: 599
Posted By DaveFlynn

RE: Will this work?

Should work. Try an 8x4E prop.
Replies: 3
Views: 615
Posted By DaveFlynn

RE: lipo C rate help

Lower C rated packs are lighter and cost less, so don't use a 40C pack if you only need 8C.
Replies: 5
Views: 955
Posted By DaveFlynn

RE: Castle Thunderbird 18 esc Q?

The TB 18 only works with 2 or 3 cells.
12-30-2010, 12:19 PM
Replies: 4
Views: 653
Posted By DaveFlynn

RE: EDF+motor: prolonged operation capability?

if by powerful you mean high volume look at a squirrel cage. For pressure a lobe pump (roots blower) is hard to beat, they're built to run 24/7 for years. There are also 2 stage blowers.
12-02-2010, 02:43 PM
Replies: 5
Views: 906
Posted By DaveFlynn

RE: Cold weather question..

LiPo's don't work well, or at all, below 40F. Motors work better cold.
12-02-2010, 02:35 PM
Replies: 3
Views: 663
Posted By DaveFlynn

RE: Propeller selection for Electrics

I assume that when you say two types you're ignoring slo-fly props, a third type. The heavier props are to handle the high torque of a engine's power stroke and provide flywheel to keep it going. ...
Replies: 1
Views: 622
Posted By DaveFlynn

RE: Idle Current?? Long duration glider flight.

I've not seen one that draws a whole amp, but yes some do draw some power when the throttle is off. I believe this to be an error in the firmware in some ESC's, the ESC should allow the prop to spin...
08-23-2010, 04:37 PM
Replies: 170
Views: 24,015
Posted By DaveFlynn

RE: A10 Warthog IMAA legal size from Wowplanes

Nice plane. I really enjoyed following this build thread.

Thanks,
Dave
08-15-2010, 11:32 AM
Replies: 5
Views: 4,188
Posted By DaveFlynn

RE: BEC and Receiver Battery in Parallel

Some BEC's can be connected in parallel some can't. Contact the manufacturer to be sure, but usually the switching type can be paralleled. Some linear voltage regulators will oscillate if hook to...
08-14-2010, 11:05 AM
Replies: 23
Views: 2,116
Posted By DaveFlynn

RE: not sure what i am doing wrong, but the plane will barely fly!

No 3D, just sport. My biggest single motor plane is a 10lbs P-40 with a 16x10 3-blade prop and a 250Kv motor on 12S1P 2200mAh. 24 amps (1000watts) static thrust is 10lbs.
08-13-2010, 06:22 PM
Replies: 23
Views: 2,116
Posted By DaveFlynn

RE: not sure what i am doing wrong, but the plane will barely fly!

Limiting the amps limits the torque, but having the higher voltage will allow a higher rpm as the prop unloads. I don't trust the C rating on batteries and try to stay below 60% of the rating. The...
08-13-2010, 08:50 AM
Replies: 23
Views: 2,116
Posted By DaveFlynn

RE: not sure what i am doing wrong, but the plane will barely fly!

That's the setup I use: 4 2200mAh 3-cell packs is series. Works great. I limit the amps to 24. Static amps would be high without the current limit. For more duration double up and use 8 packs.
...
08-12-2010, 04:30 PM
Replies: 23
Views: 2,116
Posted By DaveFlynn

RE: not sure what i am doing wrong, but the plane will barely fly!

Not enough volts.

22v x 180rpm/v x 80% efficiency = 3168rpm

You should be running 10 or 12 cells not 6.
07-13-2010, 04:17 PM
Replies: 4
Views: 832
Posted By DaveFlynn

RE: Twin motors and Motocalc

What is the prop you wish to use?
Replies: 4
Views: 1,052
Posted By DaveFlynn

RE: 2 outrunners on same shaft

They would be wired in parallel, unless all six wires were brought out. Getting them phased correctly is not as easy as it looks. Two ESC's is easier.
Replies: 4
Views: 1,052
Posted By DaveFlynn

RE: 2 outrunners on same shaft

Works fine. Gives 2x the torque for 2x the watts. Need 2 ESC's.
06-16-2010, 04:39 PM
Replies: 4
Views: 1,208
Posted By DaveFlynn

RE: How to determine safe watts for unknown motor?

Plot a graph of watts vs temp. The wattage at which it is stable at 80C above ambient is you continuous limit.
Replies: 4
Views: 718
Posted By DaveFlynn

RE: Thinking about starting a motor line

One motor I would like to see is a 4030-250. Stater 40mm Dia x 30mm long. Kv=220 to 250 RPM/Volt. Series wound "Y" to run 20 to 30 amps.

My biggest complaint with the available motors if that...
Showing results 1 to 25 of 450
 


 
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