sillyness

My Feedback: (25)

If I were to run longer servo arms on my 40% ailerons I can easily get blow-back. I friend was getting it with his. He went to 3 servos 'cause he does a lot of 3D. I stuck with 2 and use shorter servo arms (I get the same effective torque to the surface as his plane with 3 servos just due to the shorter arms and less aileron throw).

bart-rennes

Does someone know if the Futaba rx r147 can support 10amp ? you said JR rx can support to 20 amps, great but what's other rx..

Tired Old Man

My Feedback: (1)

Actually the JR receivers were tested up to 60 amps. Since they figured nobody would ever drive that much through the receiver they stopped there. Most of the better receivers can take well over 10 amps and be surprised indeed if the Futaba receivers weren't on a par with JR or even better.

Tony Hallo

I wonder how the test were conducted? It's hard to image 60 amps through a type J connector?

yarom

My Feedback: (82)

RDB, you have more courage than I do. I will not put anything less than 5955s on ALL surfaces of my 88" Yak.

Them surfaces are huge and on wild 3D, they take a lot of abuse.

After reading the TBM article, I started thinking even the 5955s are not strong enough but was afraid to replace them with 4711s as I don't want my beloved Yak to pull a 'Quique' on me... Besides, I had so many issues with the JR servos, they don't look like an option anymore...

Tired Old Man

My Feedback: (1)

They did not test through the connectors. They were testing the capacity of the receiver buss, not the wiring leading up to it. Go back about two years in the Aerobatics column of Model Aviation while Mike Hurley was doing the writing.

Tony Hallo

I do remember his statement in MA and questioned it then and haven't changed my opinion today. It's misleading to state any receiver is good for 60 amps when it's impossible to put 60 amps in. Our receivers are like chains, only as good as the weakest link.
When do you think the radio manufacturers will begin providing receivers that are designed to preform the intended function? Servo outputs continue to rise and we're still using receivers suitable for 40 size trainer!

Richard D Bahmann aka/Wrongway

My Feedback: (42)

Yaom, I observe certain principals. I don't slam the sticks on 3D rates unless I am below a certain velocity. That is the hardest that the servos will see. When I was doing 10+ flights in a row the hottest components were (in decending order....rudder servo, battery (NIMH), receiver, then equal for ail and elevator) If heat is a function of the electric work (Disclaimer: I am not an electrical engineer) then the rudder is the hardest worked and not the wings/tail.

Sadly after 95 aerobatic and 3D flight hours I will be retiring my 5945's as they have developed some slop particularly on the ailerons. I stole the servos from my 85 inch Extra which had 40 flight hours when I pulled them, and put them in the EF which now has 35 flight hours. I think I got my money's worth but, IMO that these 5955's are the way to go if starting from scratch.

I would like to see how many flights/hours it takes to wear out a 5955.

R

Tired Old Man

My Feedback: (1)

It's very easy to power a bus using connections other than a simple J connection. If I wanted to test a connector I would specifically address the connector. If I wanted to test a wire that would be the area checked. If I wanted to see how much current a bus providing power to my product would handle be sure I would flood it with all it would take and not restrict the test to a connector. That applies to any electrical product, including busses on robotic and full scale planes. If you want to run mogambo amps through a receiver invest the time to make up connectors that can handle the load. It's that simple. Nobody is restricting us to using those little 4 amp connectors. That's all self inflicted because we are lazy.

As for the question about when the manufacturers are going to step up with higher rated products, some already do but you have to go to their robotics departments to obtain what you want. Unfortunately most people aren't willing or ready to deal with the price tags that will be attached, and none of the manufacturers will have much sympathy for systems that fail the user for one reason or another. They already know that most failures are user induced so there's not much impetus to go another mile down that road.

The manufacturers will be right there for us when there is enough sales and dollar volume to make their investments to produce and market worthwhile. We have to be willing to pay the price and expand our knowledge levels to meet the higher levels of performance and accept the associated risks, which will be higher. As it stands it seems that the manufacturers are already providing more than many can handle as it is. To verify that statement all you need to do is read some of the questions posted in the Giant Scale Forums. I don't know about you but I find myself all too frequently reading some of that stuff and thinking about the total lack of experience that's illustrated by the questions. Like they went from a simulator or Firebird straight to a 40%.

The bigger kick is that most of the giant scale planes have far and away more servo torque available than they will ever see a need for.

sillyness

My Feedback: (25)

In my 40% and 35% I use 2 RXs and 2 Regs. Each reg has 3 outputs.

Doing the math, that's 12 Amps/RX and 24 Amps for the plane. That should be plenty.

gooseF22

What are some favorite switches out there with dual or triple plugs on output suitable for giant scale or jets?

opinions please. I think it will help people see an option for those who go direct into the RX versus Power expander type boxes.

bgold

I'm using a Fromeco Wolverine switch with Anderson Power Pole connectors from both the battery and to the regulator. The switch is a double for two batteries and two outputs. Read Fromeco's literature, the switch will take power from the higher charged battery first and then use both batteries equally once the voltage has been equalized. If one battery fails it will take power from the good side and output it to both sides of the switch. I've checked the high low battery thing by starting with one battery lower than the other and after a day of flying they both had equal voltage left. Nice switch, and it has neat blue diodes that light up when the power is on.

Hammbone

My Feedback: (309)

I like the Smart-Fly Super Switch. It has a deans connector on input with either a deans connector, or dual standard connectors on output. 18 gauge wire is used with the deans connector and 22 gauge with the standard connectors.

http://www.smart-fly.com/Products/Switch/switch.htm

Jim

gooseF22

dont count out old trusty JR switch

yarom

My Feedback: (82)

The nice thing about them switches used for SmartFly Power Expanders or SuperRegs is that they are normally open (NO). That is, if you have a failure, they stay on and at most they will run down your batteries...

sillyness

My Feedback: (25)

Do you mean normally closed? Closed means a circuit is powered. On the Fromeco units, when the switch is open, the circuit in the chip is closed.

I still use the Fromeco regs with the switch built it. It's built into all the regs no matter what (normally closed, incorperated in the Motorola regulator chip), you are just paying the extra $7 for the lead and the pin. They drain a little current when off... not a big deal with the 5600 packs on my 40%. I just unplug the smaller 2600 bats on my 35% when not in use.

Using the built in switch is the simplest, safest, cheapest, lightest, and most failsafe way to go. Order the reg with 3 output leads and your power goes DIRECTLY from reg to RX without passing through any other switches or weighty, unreliable, or otherwise cluttering gadgets.

Cheers

yarom

My Feedback: (82)

You are correct - normally closed.

riproarn

My Feedback: (1)

I have checked with Horizon Service dept on the 8611/8711's and they say not to go over 6 volts period. That means you can't use them directly with A123 cells. I also checked with Hitec and they said you could use the 5955's with up to 7.2 volts (A123's or Nicads). Does anybody have any different info?

Ron

yarom

My Feedback: (82)

Quite a few people are using the 5955s with LiPos or Lions direct, no regulator, no issues.

Tired Old Man

My Feedback: (1)

If Horizon has directly stated not to exceed 6 volts and Hitec will let you go up to 7.2v, what other info is there? The manufacturers have spoken. I know of people using higher voltages with some Hitec servos but they are willing and capable of paying the price of failure when it happens. Once you go past the manufacturer's guidelines you're on your own regardless of what anybody says.

Richard D Bahmann aka/Wrongway

My Feedback: (42)

Can you clarify "not to go over 6v?" Does that mean one would have to buy a regulator for these things on a 6 v NIMH where you stop flying at 6.0? Or is the manufacturer saying not to go over a 6v system?

Thanks

Josey Wales

My Feedback: (61)

Ive used 8611''s with 6v packs--voltage started up at 7v and went down to 6.0--no regs
Been using 5955's with A123's at a steady 6.6v so far with no problems

Bob Pastorello

My Feedback: (198)

Just ANOTHER reason **not** to run JR metal-geared servos. After converting to the Hitec 5955's, there won't be another JR servo on a control surface in my shop. This is one of those "you don't believe it until you do it" things, and that was where I was before I actually ran the Hitecs.

And they LOVE the A123 un-regulated voltages.... 6.6v nominal, and working sweet.

riproarn

My Feedback: (1)

Horizon said not to exceed 6volts which leaves out a 6volt pack(5 nicad cells or A123's).

riproarn

My Feedback: (1)

Here is a statement from Hitec on voltage on 5955's.

http://www.rcuniverse.com/forum/m_2554151/tm.htm