ultimate 50cc setup

[kdouglas03]

Alright here it goes go to here http://www.jrradios.com/Products/Gal...RPR922&Index=0
Its basicall the r922 reciever set up from jr.
All i would add to this is a wolverine switch to charger outside the plane....do i convert all to deans connectors or what.............I just want the very best setup for my next gasses money isn't an option i just want redundancy and no problems with amps or voltage under the highest of loads....Any input would greatly be appreciated. I just simply want the best that I can get. Please private mesage me if you want to give your perfect setup for a 50cc gasser. Thanks alot and sorry if I sounded dumb there is just too much out there for sale and don't know what's best.

Thanks, Kirk

Sorry for putting ultimate 500cc meant 50cc!!!

[airborneSGT]

Wow that is waaaay overkill for a 50cc setup. You can run one A123 pack all day long to a dual output switch and be fine. Read up on what people are putting A123 cells through. I have had tons of hard all out 3D flights on 50cc planes with only one Rx and battery pack. My current setup is AR700 with a single A123 pack to a dual output switch. All digital hi torque servos and no problems so far.

[MODE 1]

Well if you want redundancy then 2 bat packs will be needed but as airborne said, one pack of a123's are perfect for that plane size. One is enough for an all day fly sesh easy, 2 is just extra weight but has its pros and cons depending on who you talk to and how safe your trying to make it. Prolly find that 2 packs of 123's weigh less than 2 NiMh packs.

You'll get a million opinions on this subject and end up lost in the fog. Go with the simple approach of less is more.

[phippsj]

The R922 is way overkill. I just run a R921 w/ the 2nd satellite in all my 50, 80 & 100cc planes. I run dual Li-ion 2-cell Fromeco packs on the receiver and a third one for the ignition, with smart-fly regulators on all three. I can fly all day without having to re-charge.

The guys in the previous posts like A123 packs so they don't need regulators. I haven't made that change yet. I agree with them, less is more.

Hint: Mount a female charge port in the wall of your fuse with an extension going to the data port on the R921. This way you can check the drops with the data logger without having to dig into the plane to plug it in.

Good Luck.

[james.l.hill]

I noticed there is a filter/switch for sale(Pilot RC I think) that is supposed to guarantee no ignition noise getting into the rcv, I know many are doing this w/o any extra filtering, it $50 if I remember right. I might do this with my next plane to save weight and simplify setup, I already have been flying 50cc planes and glo for 20 years with no battery backup and not a single issue,(OK, maybe 1) although with only 1 batt for both ign. & rcv might be prudent to check each flight.

[cjcyclesrc]

The 922 is an overkill for a 50cc, but they are great RX's. If you want to use the 922, You don't need any other switches than the one built into the RX.

A 921 and Fromeco Wolverine is a great 50cc setup. You can go with two 1100, or 2300 A123's and be fine. I'm using two 2300 which is an overkill and I still saved 5-6 oz over the 1950mah nimh's that were in the plane when I bought it.

[classclown]

	Quote: Originally Posted by cjcyclesrc
	The 922 is an overkill for a 50cc, but they are great RX's. If you want to use the 922, You don't need any other switches than the one built into the RX. A 921 and Fromeco Wolverine is a great 50cc setup. You can go with two 1100, or 2300 A123's and be fine. I'm using two 2300 which is an overkill and I still saved 5-6 oz over the 1950mah nimh's that were in the plane when I bought it.

I have a Wolverine with the three outputs, no problems with 2 2300 A123's for a Powerexpander and regulator to the ignition box for a 35%? I've never played with the A123's yet. About how many flights would I get with 8 7955's and a fast digital servo on throttle?

[cjcyclesrc]

	Quote: Originally Posted by classclown
	I have a Wolverine with the three outputs, no problems with 2 2300 A123's for a Powerexpander and regulator to the ignition box for a 35%? I've never played with the A123's yet. About how many flights would I get with 8 7955's and a fast digital servo on throttle?

A Safe 4 long flights. It's all relative to your flying and the plane setup.

When I say set-up I'm not only talking about binding. The higher current flow setup you have the more Mah's you are going to use. The Servos that most of us are running on our 3D birds are very power hungry.

I like to compare it to Plumbing. Voltage is like water pressure and Amps is like the Flow Rate. A 2" pipe at 100psi will flow much more water than a 1/2" pipe at 100psi. Now what happens when you put a restrictor with a 1/2" opening in that 2" pipe. It will flow the same amount of water as the 1/2" pipe. The Pressure will drop after the Restrictor. The same thing will happen with your power system. When the servos draw current it will be limited to the flow(amps) of the smallest Restrictor. When the power is Restricted the voltage will drop down line. The drop in Voltage will turn into heat. Ever notice the Heat sinks on Regulators. Things that act as Restrictors- Wire, Connectors, Regulators, Expanders, Matchboxes, Mah counters, RX's, and Switches. First of all you have to consider how much Flow (amps) the battery is capable of producing. With 2300 A123's that are capable of producing over 120 amps bursts and 70 amps continuous we are only limited to the Restrictors. Now compare that to a 2600 LiIon that is capable of 4-8 amps.

Servo's run off of Voltage. The more Voltage Stability you have at the Servo the better they are going to perform. If you want to test your setup just hook up a load at the servo connection. What do you think will happen when you put a load of 2 amps on the elevator plugs in the tail. Most of the servo's we use can draw 2 amps. Now that's only testing for one servo. Now do that on all the leads at the same time and watch what happens to the voltage.

What Happens to the servo's when the voltage drops? Look at the specs on your servo and compare the 4.8v ratings to the 6v ratings. You loose torque and speed. With the loss of Torque and Speed the Servo's use less power(Mah's). If you upgrade your restrictive setup to a high current one you will feel a difference similar to lowering your expo. That is because the servo's are acting quicker. You may or may not notice a difference in the torque depending on if you had any blow back before.

[kdouglas03]

Alright so i guess i go to the a123's.........here is what I want to know
1. what 3 batteries to get (2rx 1ignition)
2. Switch (charge port)
3. The best charger
4. Best battery checker
5. Which Reciever (r921)

And anything else I might need?

[kdouglas03]

Also it might be easier just to give me run through from batteries to switch to receiver including any extension or wiring accessories I may need.

[classclown]

cjcyclesrc, thanks for the reply. Completely understand your analogy. Captain Kirk, sorry for the hijack.

[kdouglas03]

It's cool. Just trying to figure this stuff out.

[MODE 1]

	Quote: Originally Posted by kdouglas03
	Alright so i guess i go to the a123's.........here is what I want to know 1. what 3 batteries to get (2rx 1ignition) 2. Switch (charge port) 3. The best charger 4. Best battery checker 5. Which Reciever (r921) And anything else I might need?

A123 2300 2 packs if you insist these for the Rx
1 x 6v or 4.8v 1100 NiMh for ignition is plenty
2 x HD switches with deans in and out if it fits your Rx if not make it 2 out per switch with standard leads.
Cellpro charger for your 123's
I use the futaba 3 amp checker but there are many out there pick one thats at least 1.5 amps more is better

Rx depends on your personal setup. If going with dual leads from the HD switches best to get a Rx with more channels to plug the leads into.

[askforplanes]

I would use 2 batteries on the reciever, I had one plane where the battery came off the velcro and unplugged and the plane went straight down to the ground with no control.

JP

[cjcyclesrc]

	Quote: Originally Posted by kdouglas03
	Also it might be easier just to give me run through from batteries to switch to receiver including any extension or wiring accessories I may need.

A good 50cc setup-

Batteries-

1100mah's if you want to save the weight for the RX (2.5oz less per pack)
2) 2300mah's for the RX and 1100 for the Ign if you want to get a lot of flights before recharging.
I build my own packs. You can buy them from several manf. I've been pleased with the NoBs ones. www.hangtimes.com

Switch-

Fromeco Wolverine is a great option
Smart-Fly optic kill for the Ignition

RX-

JR 921

Extensions-

I prefer Hitec HD twisted wire extensions.

Charger-

Cell Pro 4 (you need to be able to balance charge the batteries).

Tester-

If in doubt recharge. I only takes a few minutes to recharge. There is not a good way to load test an A123 to establish the charge state.