Disney1

I have never seen a short in a servo.
What brand are they?
Why don't you pull it open and ohm the wire ad see where the short is?
May be fixable, unless it is on the PCB.

Ron Sr

phmurphy

The bad servo was an original that came with the V2. Ihave some generics that Ihave to make fit, but they work just fine. Iam still testing,

Disney1

Ichanged all my servos to HItec HS55's really like them.
http://www.helidirect.com/hitec-hs55...ervo-p-427.hdx
Like all non OEMservos they need a little help to fit in but a single Zip-Tie on eawch one as a safety is all you need.

phmurphy

I just disemboweled the servo and could see nothing wrong. Ihave to just guess that perhaps it was locked in a bad position that caused a short. It also has a tiny circuit board so something could have gone wrong in there. No burn areas or wires, and no electrical smell. When Iconnected the bad servo, the RX would immediately heat up. Ihave the old RX that Ithought was dead hooked up and Ihave all controls and throttle, but it is too windy outside to see if the gyro still works.

I use a paperclip held in with hotglue to make the servos Ihave fit. Ialso have to reverse the servo on the TX to get it to work right.

Pat</p>

Disney1

For the price it is trash.
As for how you hold the servos in place
What ever works is great.

dknovick

Could also be a burned out motor in the servo causing the problem.

-Dave

stalledout

Hello,

I am running my Falcon 40 V1 with the stock battery and a replacement main motor (I forget where I got the main motor from). Anyway, I started flying it again after not flying for quite a while, and it seems that at the start, there is not a lot of power, but after about 30 sec - 1 min of flying there is more, like when I first got the heli. So is this a symptom of a motor or battery problem? The replacement main motor has been used for quite some time, it is not new

Also,
- where can I get good replacements for both the main motor and the NiMH battery pack?
- What parts do I need to upgrade to the new V2 rotor head/rotor head core? I have a lot of spare parts, but when that Y shaped rotor head core breaks, it is a pain in the but.
- I know that this is an old heli, probably not worth spending much on upgrading, but is there one or two of the CNC upgrade parts that are really worth it. (Just so you know, I do not want to upgrade to Lipo)

Thanks.

dknovick

Hey!

That's weird. Almost like something is warming up...Not that it should do that. Batteries don't tend to do that sort of thing, but I could see a brushed motor getting better performance as it heats up and possible makes better contact. So, I would guess the motor is going.


We recommend using ushobbysupply (and looks like 1/2 off sale) for all your replacements. But, from my looking, it doesn't help you with a NiMH battery. If I remember correctly, you'll have to replace most of the head to upgrade to a v2 heli (it's mentioned somewhere in this thread). A pain to replace the rotor head core, or to find? There are CNC replacement parts (if you can find them).

Why not lipo?

-Dave

stalledout

Thanks, I will look into ushobbysupply. Do you know what motor by chance? Or is it clear?

Why not lipo? - I live in a multi unit building with very young, very old, and very disabled residents. I know the chance of a serious problem with lipos is very, very unlikely, I do not want to take the chance and affect other people, probably severely if there was a problem.

dknovick

It's clear. If you click on "Parts and Upgrades", you can then click on your heli, and get a list of parts that will fit. Michael is also very good about answering any questions you might have (as well as us).

Good enough reason for not using Lipos. There are LiFePO4 (aka A123) batteries which have the high power density, but are safer. I usually just use Lipos, so I wouldn't have a recommended place to point you toward. You might have better luck on the Battery thread of this site.

-Dave

stalledout

Thanks for the response. I did find the original NiMH batteries at Nitroplanes, I guess I will see how long they have been setting around when I get them. I also got two replacement main motors from USHobbySupply

Also, I have a 4in1 I replaced, I forget what the exact problem was, I think it just did not respond. What are the steps to try and diagnose the problem. I don't need it right now, but don't want to end up buying another new one if the current one I am using (the replacement) goes bad.

Thanks.

dknovick

Depends on the symptoms...

For a V1 Falcon 40 (72MHz):
If the receiver doesn't see the TX, (the light doesn't blink like it should)
check the crystal

If the main motor doesn't turn, but the tail does
the MOSFET for the main is probably burned out (but can be replaced)

If both motors don't run, but the servos respond
then both MOSFETs are probably burned out



Let us know what the symptoms are.

-Dave

stalledout

Boy, this is embarrassing, I figured out the reason I was having trouble with that Rx, was because the crystal was loose!! Need to pay more attention.

Thanks for the tips on what to look for anyway, I will keep them in mind if I have trouble in the future.


To anybody,

If you have a V1 Falcon you are not using, and have any of the CNC upgrades, let me know, we can make a deal perhaps.

Thanks.

dknovick

No worries, at least you found the problem!

-Dave

stalledout

FYI, Before swapping in one of the new motors, I tried one of new battery packs I got from Nitroplanes. Works great, no 'warm up' needed. Full power from the start. I did do a forming charge on the pack before I used it the first time. BTW, the two new battery packs I got from Nitroplanes were only 2 months newer than my old pack. Both dated early 2009.


I will post something if the other new pack does not perform the same.

Yellow Crow

My Feedback: (1)

For all the "old timers" on this forum, just thought I'd check in and let you know I'm still lurking in the background. Hope everything is going well for everyone. Jim

Disney1

Lurk, Lurk.

I am still hiding out here too

Ron Sr

chevypower1930

Alright yall... I've had my falcon forever haha, just took it out to fly around in the house and smacked a table trying to trim it after about a year of it sitting on the shelf... anyways, cracked the main blade and I can NOT find another one. The only ones I see are from japan and I'm not paying 10 dollars shipping for a 6 dollar blade [:@]

Anyways, I tried searching the thread but is there any upgrade blades you all recommend? If so, got a link?

Disney1

I highly reccommend Super Blades bu Super Skids

http://www.super-skids.com/superblades.htm

chevypower1930

Alright awesome just ordered the XP versions...

chevypower1930

Alright fellas... got the blades on, now the tail seems like it doesn't want to keep up..... It's very slight when I add full right trim, but still, it wanders to the side. I honestly don't really need the falcon, haha I have way too much stuff in the hangar and I never fly this thing. If anybody wants a Falcon basically brand new with MAYBE 10 flights on it, shoot me a PM or just post it in here... I'll send it your way for a very low price with the superblades included

It is the newer Falcon V2 version.

phmurphy

I am interested, is it V2 of the Falcon? What price? I have two broken Falcons and Ican probably canabalize to get one that works.

Pat

chevypower1930

Yes it is the V2... everything looks brand new. Idk 40/50 bucks whatever, it'd be more to make room in the hangar then to make money out of the deal

phmurphy

Thanks for the great offer. I realize that the Falcons Ihave, all have tail lock issues and if I get one more with a tail lock issue Iwill not have any that work. I just installed a new 4in1 with the same problem so perhaps this winter I can figure this out and decide if I just got a faulty new 4in 1. I replaced the main and tail motors, so who knows what is going on.

Thanks,
Pat

Disney1

Morning All:
The gyro in the 4in1 of the F-40 is not that great.
You will always have some drift. you can turn up the gain on teh gyro a bit but that will not help a lot.

Ron Sr