Problems with capacitors

[fred]

Thank you Fred....cool stuff! So where in line wiring would I put resisters in?
George, I have ordered a few 10f from amazon, won't be here for a month tho,,,,
The sopwith needs finishing anyways.....

 
Not resistors .. but  Diodes. cheap easy each one drops (memory tho) 0.4 volts so a couple? in series with the battery outs. 
My 2.6 gm  10F caps from:
https://usa.banggood.com/5pcs-2_7V-10F-Cylindrical-Ultra-Super-Farad-Capacitor-High-Power-Capacitance-Supercap-10-x-26mm-p-1218354.html?rmmds=myorder&cur_warehouse=CN 
took about 2.5 weeks

[kaintuck]

Thanks George, next payday, I'll get some like you got...
Fred, thank you....I'm just now learning electric parts....diodes!
Marc

[ghcrash]

[/quote] 
 
My 2.6 gm  10F caps from:
https://usa.banggood.com/5pcs-2_7V-10F-Cylindrical-Ultra-Super-Farad-Capacitor-High-Power-Capacitance-Supercap-10-x-26mm-p-1218354.html?rmmds=myorder&cur_warehouse=CN 
took about 2.5 weeks

[/quote]

Those sound pretty good too.   Order you capacitor from wherever you want   But check the voltage, capacitance, weight and ESR to find the right one for you.

 

[kaintuck]

Geaorge,
I received my super capacitors today. so at lunchtime I charged one up with my small 2 AA cell charger...then connect the wires to the china geared motor...it works!...I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors? And will I still use a 3v power source for charging?
marc

[OZPAF]

I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors?

Why?

Providing you keep your wiring short with soldered joints(keep resistance to a minimum) 3V will work well. They will in general be ok to 3.5V (but check with a test first) Using 3V on my arrangement of a 720 coreless motor direct drive to a 65mm(about 2.25") gave 36gms of thrust initially dropping to around 24 g. more than enough to give my 20g model a good climb.

John

[ghcrash]

I  think that John and I may have read your question differently.

Yes you can wire the 3v capacitors in series then charge the series pair to 6v.  That will take a 6v charging source, a 3v charge is just going to give you 3 v.   But, like John was implying, why would you want to if you can get 30+ grams of thrust form a 7mm motor on 3 volts.  What might make more sense is to wire the capacitors in parallel for a longer run time.

Did John of I answer your question?

    George

[kaintuck]

thanks ya'll..........I weighed them, yellow 15F was 4.8gm, blue 15F was 4.7,black 10F 3.08gm....
geared motor switch and prop 9.7gm.....
marc

[kaintuck]

take a look at #JUWT1105MCD on digikey site......tiny?
marc

[TimWescott]

Geaorge,
I received my super capacitors today. so at lunchtime I charged one up with my small 2 AA cell charger...then connect the wires to the china geared motor...it works!...I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors? And will I still use a 3v power source for charging?
marc

If you take a motor/gear/prop assembly that's designed for 3V and put 6V to it you will overload the components.  If you have a motor &c. designed for 6V -- sure, go for it.  Or use a cap rated for 6V.

If the motor's designed for 3V -- put two caps in parallel, or use one higher capacity cap.

[ghcrash]

take a look at #JUWT1105MCD on digikey site......tiny?
marc

Please note that is 1F capacitor, not a 10F cap.

[kaintuck]

I saw that George ...but it looks tiny...I have one geared motor, I think a 4/7......just thinking...
Marc

[kaintuck]

  here's my 10f super capacitor in the nose of sopwith comic. The chinee geared motor runs with this prop with good power. The whole unit is pulled, charged, then replaced...small slide switch to turn her on....

My mechanics aren't very good at sheet work....the gun positions are eliminated and a Lewis gun will be mounted on the upper wing...night flash from a machine gun blinds you....them dirigibles have to be downed fast, before they reach their drop points!!!

Marc

Problems with capacitors

Problems with capacitors

[ghcrash]

Looks good!   Keep us posted as you finish the build, and then when you fly it.

    George

[OZPAF]

Looking forward to the maiden of this model. Neat work.

John