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Old Sep 22, 2012, 05:01 PM
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None of us are experts at this either. Even in my profession, computer software developer, there are no experts - only specialists. The computer software industry evolves even faster than the hardware industry. It takes two years to become an expert of a particular software framework and by that time some thing new has come out. In software, no one is interested in an expert of something that is considered "old". It is only possible to become an expert if it stops evolving.
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Old Sep 22, 2012, 06:19 PM
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United States, FL, Palm Coast
Joined Mar 2012
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Originally Posted by BenVK View Post
It was meant as a compliment. None of what we talk about here is my area of expertise but I also love to learn new things.
I know, and thank you. But text just could never bring my personality across properly. Not that you would understand me any better in person
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Old Sep 23, 2012, 02:32 PM
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United Kingdom, England, Enfield
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Online forums are always difficult to navigate. I'm actualy a moderator on a military collecting forum, another of my hobbies. If you type BenVK into google, it will be somewhere in the list. I can tell you categorically that all you guys here and on the helifreak forum have been fantastic with your help and guidance and I haven't noticed any bad behaviour or the need for a mod to step in.
The same can't be said on the forum I help moderate, we have to ban people daily for their insulting and bigoted remarks. I suppose it goes with the territory. Nevertheless, history and military history is my first love because it's fascinating and there is no end to the learning curve.

And so back to helicopters. I don't think I'll ever master them. That's the appeal I guess which is the same as collecting I suppose. Both are bloody frustrating sometimes! or should I say most of the time.
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Old Sep 23, 2012, 05:26 PM
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United States, FL, Palm Coast
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Originally Posted by BenVK View Post
Online forums are always difficult to navigate. I'm actualy a moderator on a military collecting forum, another of my hobbies. If you type BenVK into google, it will be somewhere in the list. I can tell you categorically that all you guys here and on the helifreak forum have been fantastic with your help and guidance and I haven't noticed any bad behaviour or the need for a mod to step in.
The same can't be said on the forum I help moderate, we have to ban people daily for their insulting and bigoted remarks. I suppose it goes with the territory. Nevertheless, history and military history is my first love because it's fascinating and there is no end to the learning curve.

And so back to helicopters. I don't think I'll ever master them. That's the appeal I guess which is the same as collecting I suppose. Both are bloody frustrating sometimes! or should I say most of the time.
Yeah, i just hate when i crash! But what are you going to do? Some people have the motor skills, others struggle. Practice makes perfect, and not everyone has the time. But the sim does help with that. Otherwise, i think most of my frustrations in this hobby could have been removed had i just bought a more expensive, better quality helicopter in the first place. The learning curve was higher for a 4f200 maintenance, being my first CP, IMO. So a more expensive heli would have been much less to learn and maintain. But i'm glad it worked out this way. I got to modify and work on a heli while learning and helping others. It gave me the experience to dive into the 5 blade head and maintain any other number of blades on a rotor. It probably couldn't have worked out better. Even though it frustrates the hell out of me too.
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Old Sep 23, 2012, 06:46 PM
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United States, MS, Columbus
Joined May 2011
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Originally Posted by IntegrityHndywrk View Post
It gave me the experience to dive into the 5 blade head and maintain any other number of blades on a rotor. It probably couldn't have worked out better. Even though it frustrates the hell out of me too.
If you don't mind my asking, did you custom build (have it built) the five blade head or buy it somewhere? It has some red anodized parts I haven't seen anywhere else almost as though it was a stock head and swashplate.

All five blade heads I've seen are for Trex 250 and similar. The Trex 250 manual gives a shaft dimension of 3.5 mm. My 4f200 shaft measures 3.9 mm. How do you deal with that?

Thanks! - Jack
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Old Sep 23, 2012, 06:57 PM
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I also would like that info on the 5 blade head.
Jack for your info the CB180 and 4F180 mainshafts are just under 4 mm.
I wonder if your measurement is a bit low? Maybe it is closer to 4 mm?
See this thread on some experiments going on. Maybe you can offer some ideas as well. http://www.rcgroups.com/forums/showthread.php?t=1724648
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Old Sep 23, 2012, 07:13 PM
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Originally Posted by ChopperJack View Post
If you don't mind my asking, did you custom build (have it built) the five blade head or buy it somewhere? It has some red anodized parts I haven't seen anywhere else almost as though it was a stock head and swashplate.

All five blade heads I've seen are for Trex 250 and similar. The Trex 250 manual gives a shaft dimension of 3.5 mm. My 4f200 shaft measures 3.9 mm. How do you deal with that?

Thanks! - Jack
Actually, they are Walkera stock parts for the 200SD5 "Airwolf" and the 200SD3 "Airwolf". Both of which have kind of cheep looking fuses. Which is why i decided to go with the nicely painted fiberglass fuse on a more powerful airframe.
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Old Sep 23, 2012, 10:03 PM
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United States, ND, Bismarck
Joined Mar 2012
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Hey I'm looking for a 4f200 airframe for a 3s rx2702v project I want to do.

Details here:
http://www.rcgroups.com/forums/showthread.php?t=1738645

Thanks,
Flint
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Old Sep 23, 2012, 10:55 PM
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Originally Posted by flint723 View Post
Hey I'm looking for a 4f200 airframe for a 3s rx2702v project I want to do.

Details here:
http://www.rcgroups.com/forums/showthread.php?t=1738645

Thanks,
Flint
You could look for a V200D03 airframe too being that they're largely the same. Depends on whether you want a TT 2 blade tail or a 3 blade belt tail. Of course you can put V200 drivetrain in a 4F200 and vice versa.
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Old Sep 24, 2012, 08:14 AM
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I do want the 3 blade tail. It looks cooler ;o Although i wonder about the tail drive ratio. I need to research that more, unless somebody knows if the tt has a higher tail drive ratio than the belt drive tail.

Edit: I have found that the tail drive ratio is the same on both as far as I can tell (from counting gear teeth on google images since there seems to be no information out there about it). Both have 172t main gear and 36t tail drive gears; assuming everything after the first gear is 1:1, both have a ratio of 4.78:1. And I would rather have a belt given the reputation of the v200d03's tt gears stripping.
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Old Sep 24, 2012, 01:31 PM
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United Kingdom, England, Enfield
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I prefer the tail assembly of the V200 because it's stronger than the 4F200 which is quite fiddly to work on with it's tiny steering hub/links and smaller diameter shaft which can bend easily in crash.

You're right though, the cone gears on the V200 are rubbish. They're made of such soft plastic that they strip if you breath on them. I've never had that problem since installing a slip clutch though . My first designs which were based on the clutch you can get for the V120 which worked ok for awhile hovering around but the rubber tube that grips the shaft and provides the "clutch" can wear out pretty quickly and would actualy start to melt the cone gear where they both touched, that's how soft the cone gear is. I also had to make a new tail shaft and add a collar on the end.

This is my latest design. The nylon tube is a modified main gear of a stripped servo (amazing what you can do with a dremel and a file!) and is CA'd onto the gear. There is also a rubber O ring and metal washer to stop the O ring touching the bearing. I've not tested it exhaustively yet but it's a lot more robust and should last for a lot longer.
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Old Sep 24, 2012, 01:43 PM
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Here's the clutch I made for the 4F200. This was a lot easier to design.
Again, you need to make a new shaft and thread it on the opposite end to the rotors. It's then just a case of filing a slot in the side of the pulley gear and then filing the opposite profile in a nylon spacer. Stripped servo gears are a constant source of inspiration for me, what else can you use them for anyway!?

The rest is self explanatory really, assemble everything and if you've got your measurements right, just a few turns on the nut will tighten the whole assembly together and in turn, tighten the pulley gear also so you can adjust the amount of slip.
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Old Sep 24, 2012, 01:53 PM
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Originally Posted by IntegrityHndywrk View Post
The learning curve was higher for a 4f200 maintenance, being my first CP, IMO. So a more expensive heli would have been much less to learn and maintain. But i'm glad it worked out this way. I got to modify and work on a heli while learning and helping others.
I feel the same way completely. I do enjoy working on and modifying helis, probably more than I do flying them which is pretty stressful if I'm honest!

It's just the annoying things with Walkera that are so frustrating. Screws shear off, gears and servos strip, RX's start acting up etc. A few extra Yuan spent on slightly better quality parts would make Walkeras much more enjoyable to own. If I ever buy another one, the first thing I'll do is strip it down completely and re-build it from the ground up with some quality hardware.
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Old Sep 24, 2012, 02:54 PM
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United Kingdom, England, Enfield
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Other frustrations include:

1. Charging all the batteries and it starts to rain.
2. Ready to go to the park and the car won't start.
3. Getting to the park and there are 5 football teams playing there.
4. Getting to the park and the TX battery is dead.
5. Forgetting to turn off the adj. pot on the Rx and the heli spins into the ground.
6. Getting up at 6am and it's dead calm, by 7am it's blowing a gale.
7. Cutting the top off my thumb with a scalpel whilst making clutches.
8. A foam blade explodes and rips everything off the heli.
9. V200 piros on take off and shears the main blade of the V120 in half which was sat nearby.
10. Kids coming up to me and asking "can I have a go mister?"


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Old Sep 24, 2012, 03:16 PM
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United States, FL, Palm Coast
Joined Mar 2012
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Originally Posted by BenVK View Post
I feel the same way completely. I do enjoy working on and modifying helis, probably more than I do flying them which is pretty stressful if I'm honest!

It's just the annoying things with Walkera that are so frustrating. Screws shear off, gears and servos strip, RX's start acting up etc. A few extra Yuan spent on slightly better quality parts would make Walkeras much more enjoyable to own. If I ever buy another one, the first thing I'll do is strip it down completely and re-build it from the ground up with some quality hardware.
Yeah, I'm pretty much only going to build them from parts from now on. Especially the little micro ones. Hell i can put one of those together in like 20 minutes and the parts are WAY cheaper then the whole heli in a box. You can cut out some of the retail overhead sometimes. Especially if you can find cheap parts, or already have compatible spare parts. Plus the added value of knowing its put together correctly. Or at least thread locked. I added my build pictures for the 4f200 to my build log here


Quote:
Originally Posted by BenVK View Post
Other frustrations include:

10. Kids coming up to me and asking "can I have a go mister?"


That is my all time fav. I had a pack of 6-10 year olds come running out of an apartment complex, RIGHT UNDER my heli and stand right in front of me begging. Lucky they still have their heads. Needless to say, i no longer fly at that field.
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