FLYMIKE

Hah, those guys are right about the 600mah and 1000. The least I would go is 1400mah 5C(6v) nimh. With 600mah your taking a chance with loosing power in the air.

Those servos are 74oz torque on 4.8v and 90oz torque at 6v. 90oz is enough for the fx100 but with oversized controls, your servos only have plastic gears and this is what might-will happen. One tooth on the plastic resin gear is going to break during a rough landing or just from the load, and then youll have flutter that might-will destroy you plane. Dont ask me how I know that! Metal gear. just my 2 cents. Good luck

skorman

My Feedback: (3)

In my X100, I am using a 4.8 volt 2700mAh nickel metal battery and I fly all day. No problems at all. Are you guys with 6 volt batteries using a voltage regulator? Without one, you could fry your servos.

Hibrass

My Feedback: (1)

Reyn,

I think you have plenty... As long as you load test the battery before each flight with a .5 Amp load and it is still above 4.8Volts go fly...!

I don't have my chart at work but I used a inline Amp/Volt meter from Hanger9 to check my servo install on my Funtana and other Aircraft and found that even loaded the 5645 was only pulling .22 amps... With my boys help, grabbing every control surface we they could hold on to, we only created a load of 1.2 total amps... That means my 1950mah battery could support my plane for an easy 40minutes of flight time..... And that is at max flight load which just doesn't happen even doing 3D...

Just make sure your battery will put out above it's rated voltage under load before flying and you should be good... Ok.. I'm off the soapbox.. LOL

Good Luck,

Hibrass

Hibrass

My Feedback: (1)

Oh...

On the JR ST125... I tried 5 on my Funtana when I was first setting it up... I had a lot of weird glitches in mid movement out of 3 of them... One elevator and both Ailerons.. I replace the whole lot with 3305's and it stopped.. I have no idea why it happened but JR was good on the return so I can't ask more than that...

Hibrass

Safety Hawk

My Feedback: (6)

I'm running a Saito 125 with the stock pipe. I thought that the IB 3600 sub-c cells would help with balance, because right now it's tail heavy and I would rather have a bigger battery than sticky weights. Right now I have a 1600mAh 5 cell hump pack that is for rc car use, and wasn't sure that was enough mAhs for the digital servos. I've thought about going the lipo route, since I've been into electric flight for awhile and have the charging equipment, but I'm not fimiliar with the voltage regulators. I just want to make sure I don't lawn dart my plane because of the rx pack.

airborneSGT

My Feedback: (15)

Regulators are cheap and easy to use. Install them after your switch but before your RX. I recommend a 20amp rated heat sink version for 3d flying.

Troybuiltmodels.com
fromeco.org
Duralite

There is no guess work at all to regulators. One 2400-2600 pack should be fine in that plane. I run Lions in my planes from 40 size to 40% and I fly everything in between!

FLYMIKE

Never used a regulator with 5c and never fried a servo. But I remember calling tech support on my radio to see if my reciever will handle a 5c and he said "yep thats what everyone is using now". This was last year or the year before. Been using 5c ever since without a problem.

You bring up a good piont. Call your radio manufacture if you havnt used a 5c before to see if your reciever will support it. Some will only support 4.8 and I probably wouldnt hook-up just one servo to the rx with batt. and play around for awile.

Some servos only support 4.8v too.

aviateur2

Ok I wrote to hobbico tech support about my problem and here is what they say:

If you are using high current draw servos(high torque or digital),what you may be seeing is that the battery voltage drops which is indicated on the Voltwatch.
Depending on the batteries capabilities to discharge the current needed,from time to time,as the battery's current level starts to fall off,it starts to draw off of the voltage.
The Voltwatch sees this voltage drop and indicates this via the LEDs.
Although it is momentary,when to much of a load is placed on the battery the voltage will decrease.
As the load is taken off,the battery voltage comes back up.

The primary thing is to make sure that your battery can handle the demands of the servos being used.

So If I have understand right, the flymike and tsyssa deduction was right about too little battery pack and I remember that guys at local field was working with pack bigger say 2700 mah. I will upgrade my flypack to see if some diffence will be on. tahnk you for your help. it's a good thing to be able to write on this tread.

Planeclothes

My Feedback: (1)

Isn't that what I said? []

aviateur2

Sorry It's my mistake. Sure you were right too. I will try some packs with more mah and I will try to know if I can go with 5 cells pack. thanks to all of you.

LANNYBOB

6v 2700 mah is the best. it can last me all weekend long flying at 10 minutes each for four hours a day.

reyn3545

Quick question.... where does everybody have their CG? Well, not everybody... I'm not a 3D flyer, I guess you'd say I'm a sport flyer. I have the CG set on the forward end of the H9 recommended range (don't remember exactly what it is), and the plane is still very "neutural".. just the slightest elevator movement causes a dramatic change. I don't want to set it so far forward that is unmanagable, but I've already moved the battery/receiver bar about 1 inch forward of where it originally sat. My receiver and batteries are fairly light, so that's not making a tremendous difference. Frankly, I thought with a 120 sized engine, I'd expect to put weight on the tail for balance, but I've actually wound up moving everything as far forward as possible and its still too responsive for my (unskilled) taste.

I love to fly it, but those first few stick movements scare the s&*t out of me!!

LANNYBOB

i have my cg exactly in the middle of what's printed on the manual. im running a thunder tiger 2 stroke which is just the perfect weight for it.
i'll i did was put the 6v 2700 5c cell battery behind the throttle servo on a piece of hard wood i found in the shed. mine's fine. i also have standard high torque's in the tail. nothing special. i can tell you that my plane balances in the neutral position. its not tail heavy nor does it nose down when balanced. it stays level.

reyn3545

Oh, mine seems to be balanced fine, will fly slow and level with no stick input, flies inverted with slight pressure. But, even on low rates (which are 30% right now), a little elevator goes a long way. I guess I'll get used to it eventually.

Planeclothes

My Feedback: (1)

How much expo you're using on low and high rates?

reyn3545

I took the plane out again this weekend... winds were gusting over 20MPH, but I had to get some stick time...

I had moved the CG forward, moving the battery and receiver almost 2 inches forward of thier standard location.... On low rates, it flew like a trainer.. very stable, predictable, no sharp movements from control input. I also dialed the middle and high rates down a bit and increased the expo.. now the travel is at 15% on low, 35% for medium and 60% for high rates, with 30, 50 and 70% expo.

Middle and high rates were much better after the adjustments. I gave the sticks to one of my buddies that does fly 3D. He flew a few rounds to get familiar with the plane, then popped into a hover.. said there was almost no rudder correction needed, even with the wind gusting like it was... the plane was standing still on its tail, but blowing away from us rapidly.

Its amazing how much difference the balance can make, even on a plane this light and long.

Scooterpilot

My Feedback: (5)

reyn3545

Where did you end up with your CG?

THanks

Chuck

reyn3545

I haven't measured how far back it is from the LE... I was just moving weight forward to see if it got more comfortable... I'll put it on the stand tonight and get a better idea.

I guess I should clarify my earlier statement... I didn't move the CG 2 inches forward... I moved the weight (battery/receiver) 2 inches forward... it may have moved the CG a half inch or so. Sometimes my fingers get typing before my brain gets in gear!

Jimeni

Anyone have tips and pics for sealing the aileron hinge gaps?

Safety Hawk

My Feedback: (6)

I'm glad you asked this, because I would like to know as well. I had planed on using Blenderm tape, but I'm not sure if it will come off when oily residue gets on it.

aviateur2

Hi Jimeni! to answer to your question, I did them on both my X50 and my X100. first on my X50 I did the bottom with clear monokote and the side up with the smae color as the wing is (white) What i did is to cut a pieces of film of 1ΒΌ" on the cross side of the roll, with that piece I fold it in two on the long side so I got a pieces of 24" X 5/8". I fold it the way the finish side was inside the folded pieces. Peel the back off and place it in the aileron hinges lines and fix it as usual. After that I only trim the excess with a brand new blade to make a good finish. on the X100, I did it with the same color of the joint (so yellow on bottom and white on top that's it.Hope it will help !!!!

aviateur2

I think you would be better to seal them with the same material the wing is cover. Does it make sense???

foxfoto

Just curious, since this is a gap seal which I am assuming is to keep any air flow from being allowed to pass through why is it necessary to do both the top and the bottom. Wouldn't just sealing one side serve the purpose or am I missing something?

Charlie

aviateur2

Here is some photo of mine. And for the pic of the eagle with flame tail, I did a printout of the picture the size that fit the whelepants with word cut it along and glue it to pants with gluestick like PRITT and cover it with scotchtape 3" wide that I cut little larger than the design. I don't know what it will gives after several flight but I try it anyway.

aviateur2

Well foxfoto, you don't have to do both side, It's just my preference that's all.In my mind, the air passing trought the hinge line couldn't peel of the seal as both side are gaps But of course you can do only one side