polver

Hi all,
Anyone know the current a DA50 ignition draws. I was considering powering the ignition module with a 1500Ma LiPo and regulating with a small 3A 6V Switched Mode BEC of the type the heli guys use. Has anyone tried this?. Gratefull for any help.

Peter.

rctom

My understanding is they draw something like 600ma, maybe 700ma. I have flown for an hour on a 1000mah battery pack, so I know it's less than an amp.

TF

rcbill

My Feedback: (1)

I have a 4.8v battery pack. It's something like a 2/3 A pack it has 1400mah from NoBS Batteries. The weight is maybe 4oz total. I can get 10 flights with a fresh charge and still have juice. I've never seen the reason to go with the voltage regulator etc. I'm not knocking it, I just felt more comfortable without the reg....... I don't see why you can't get the same or similar times..... Bill

rmh

the 1400ma Intellect cells in 4.8 v is in my book -easily the best setup going
they charge fast - are very light -have extremely deep draw characteristics -(ignitions love this part).
To be blunt -I would not trade one of these for a roomful of liIons and a reg .
HINT-why do you think 3W said do NOTuse reg.?
The designer of Vlach ignitions once was adamant about using only NiCad -simply to get full current required to "loadup" each charge of the circuit.
I checked with an old friend who has designed a number of successful ignitions and asked "what's the poop on this?"
The short answer is that tho the battery size -in amperehours need not be high --
the ability to instantly draw power is very desireable.
You won't see the spike on your voltmeter but a scope will show it
It is funny - the best battery setup is the most simple but some guys always think their high tech stuf is an improvement -
Go figure.
Back to original question-- THAT particular reg is a good one --for helis -but was done to allow seperate use of power in case the BIG one dropped out.
On my electric aerobatic models --I use a small switching reg on the 75amp ESC to supply 5v to the four small servos.
It has become a problem with many BEC's in ESC designs -- to easily overheat under load and drop voltage below the rx operating threshold.
This is a problem that took some careful sluething to pinpoint and even then -some guys still play Russian Roulette with their setups.

Josey Wales

My Feedback: (61)

When I had my DA 50's I was using 150mah per 12min flight using the 1400 intellect packs....

rcbill

My Feedback: (1)

Yep to Dick and Josey,
I'm not familiar with the intellect pack. I'm happy with my small battery pack from NoBS Batteries so far. They are low impedance and can be used for ignitions. There is always room for improvement. Where do I find the intellect packs?
I have not used the lipo/reg combination because of reasons stated by Dick Hanson. I would go with the 4.8 and instead of a regulator put the money toward a optical kill switch (option). IMO..... Bill

Josey Wales

My Feedback: (61)

NoBs

mikemcclaydds

Dick--unable to reach you through email and phone: do you have any pink rubber engine mounts that fit into the Run-around for the ys-120?

thanks, mike mcclay

rmh

No--all of that stuff is long gone -

rc bugman

My Feedback: (30)

Hi,

I still use 4 cell or 5 cell nicads on all my research planes which see many hours of full power runs depending on the vintage of the 3w ignition on the engine. Nicads can take a lot of abuse, quick charged in the field and keep on working. They are more tolerant to vibration than NiMH, and they don't weigh that much more.

Elson

rmh

the latest NIMH are awfully good ----
time marches on--

Cajuncharley

My Feedback: (2)

The ignition battery pack on my DA50 went dead today and I had planned to replace it with an 1100 ma Nicad pack. I usually fly 4 to 5 flights per flying session. I notice some of you referred to as Intellect battery packs. Is this a particular brand? If so what is the source (or distributor)?
Thanks,
Cajuncharley

polver

Thanks for the help men, I'm going to go with a good quality 4.8v NiCad pack and no reg.

cheers, peter

ljones5000

My Feedback: (2)

I take a Futaba lead over to Batteries Plus and have them makeup a NIMH 4.8v pack of 2300mah to 2700mah (depends on what he has on hand at the time). Maybe overkill, but I have never had an engine fail for want of battery power. The packs are small and light and they work.

I have them on everything from a 25cc to a DA100.

rcbill

My Feedback: (1)

Polver,
I use the metal nickel. I think Josey and Dick were refering to the nickel metal also. I have several and they are small and light and come with heavy duty leads.
http://www.hangtimes.com/ Bill

lunarhemal

Hello, does anyone know how much current draw in mA does the DA50 ignition consume.
Recently I connected a external power source on bench test and the DA50 ignition consumes only 40mA. however, I was not able to fire the engine with the intensity of spark I used to get.
I doubt this little current consumption.
I would appreciate of any reply.
Regards - Hemal