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06-04-2009 11:01 PM  9 years agoPost 1
Heli_KV

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Ottawa, Canada

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Ok now boom for HBK2. Does anybody know of options to have 10mm boom on HBK2? What if having short piece of 8mm boom going into Xtreme frame, on it to put 10mm and use tail from HBK3? Then no rubbing of belt inside a boom at least at tail end and possibly inside a boom.

Or it would be easier just to get new heli? I like this heli size and what I got performance/weight for my current HBK2.

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06-05-2009 12:48 AM  9 years agoPost 2
Gregor99

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Western Wa

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I contacted Xtreme productions last winter about an update the Extreme CF frame to work with the larger V3 boom. They said that they were working on it. Might be worth them some mail. The guruz frame has the option for a larger diameter boom block. Don't remember the size.

I've also seen the trick like you are describing, where you cut the 8mm boom and attach a 10mm boom onto it. It looks kind of ghetto and you add lots of weight to the already tail heavy HBK2.

So what's the reason? I'm still running the 8mm and have no issues. I have over 200 flights on my current belt and it still looks healthy. I've successfully retrofited the v3 tail slider. But I do wish it was a tad longer so I could run longer tail blades.
Or it would be easier just to get new heli?
Can't have too many helis. But, yes, I think about this alot as well. The HBK2 is my project heli and gets most of my flight and tinker time. Its not difficult or expensive to experiment. Something never do on a nicer heli. Not that you would need to either. Which is the point. Its trainer in more ways than one. It doensn't fly like a TrexPro but I still learn alot from it. Both mechanically and flyingwise.

Revolectrix Beta Team

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06-05-2009 02:03 AM  9 years agoPost 3
DougsRC

rrProfessor

Mass.

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It's alot of Fun experimenting with the King but I'll tell ya Heli KV, I found the belt is like the last thing that wears out on the King. But what the Hell, try it out and let us know

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06-05-2009 03:14 AM  9 years agoPost 4
DougsRC

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Mass.

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Can't have too many helis. But, yes, I think about this alot as well. The HBK2 is my project heli and gets most of my flight and tinker time. Its not difficult or expensive to experiment. Something never do on a nicer heli. Not that you would need to either. Which is the point. Its trainer in more ways than one. It doensn't fly like a TrexPro but I still learn alot from it. Both mechanically and flyingwise.
Agree Greg, the King is FAR from the best heli on the market but its a Great "beater heli" throw it around, don't expect optimum performance, use it , abuse it, flying the hell out of this thing and it will make you a better pilot in the long run. Greg, I flew a Trexpro today My flying Bud Ken got the ultimate combo- WOW !! Nice machine, tracking "Dead nuts" ---But he's afraid of crashing it I'll stick with the King for now !

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06-05-2009 05:19 AM  9 years agoPost 5
zaw

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Lebanon, NH - USA

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More heli more problem. just stick with one until you get better.

I have 3 but only fly the king2, easiest one to work with and i know it well.

ಠ_ಠ HBK2 built with inexpensive parts! ٩๏̯͡๏)۶ Gaui425

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06-05-2009 12:33 PM  9 years agoPost 6
Heli_KV

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Ottawa, Canada

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Oh Doug! Belt was my last and the only mechanical failure on HBK...Broke in flight.

Actually about belt: I see that if I rotate head CW slowly by hand there are irregularities in tension. Irregularity does not relate to head or to tail rotors. It is random from what I see. It seems, that rubbing belt creates irregular tension and irregular resistance. That's why I started thinking about boom diameter.

I have other better helis and I fly them, but King the most. I cannot complain that it flyes way worse. In it's current configuration it is pretty nice machine. Other helis being tuned aggressive are just more demanding in flight. And require more space. For example - I use 6% expo in King and 20-25% on other helis on cyclic - to get proper for me feeling.

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06-05-2009 12:55 PM  9 years agoPost 7
DougsRC

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Mass.

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Oh Doug! Belt was my last and the only mechanical failure on HBK...Broke in flight.

Actually about belt: I see that if I rotate head CW slowly by hand there are irregularities in tension. Irregularity does not relate to head or to tail rotors. It is random from what I see. It seems, that rubbing belt creates irregular tension and irregular resistance. That's why I started thinking about boom diameter.
I'm suprised to hear that, but I believe you, anything can go wrong with these mechanical wonders Its possible you had one extra twist in the belt---it will still work but it will catch on itself even more. I'm all for the bigger boom -- just in case When I spin my head by hand - there is no irregular tension at all. I also squirt silicone down the boom once and awhile, seems to help.

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06-05-2009 01:23 PM  9 years agoPost 8
Heli_KV

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Ottawa, Canada

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Yeah, broke in flight - unfortunately. I believe it happened because of idlers, when belt rubbed unmoving part of them. I hope that with what Greg suggested it should be fine now.

Extra twist - that's posiibility. I will double check this. Actually reinstall. Though I use following procedure: I align belt on mounted tail, put another end of belt on a split carbon rod like a fork and insert it into the boom, so it cannot rotate inside voluntary. Then I pin belt by some other rod and mount front pulley. Mistakes are still possible though. Spraying silicon definitely helps, but it cures consequences, not the reason.

In any case, larger boom is not in a nearest future. Just bought two more Zippys.

Let King fly!

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06-06-2009 02:54 AM  9 years agoPost 9
Heli_KV

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Ottawa, Canada

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Storey continues. I found the reason of irregular belt tension. Tail pulley was weared out. Teeth almost gone and it was a bit conical. It lasted for the whole week!

Almost new pulley is installed. We'll see it's life duration.

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06-06-2009 03:32 AM  9 years agoPost 10
Gregor99

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Western Wa

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Man that is rough. What do you think about something like this?

http://www.helidirect.com/extreme-m...king-p-8402.hdx

Revolectrix Beta Team

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06-06-2009 04:26 AM  9 years agoPost 11
Heli_KV

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Ottawa, Canada

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Been there. Tried this. Teeth are gone as well. And it requires 43T front pulley, otherwise tail speed too much. And it is a bit thiker then 9T - belt rubbing.

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06-06-2009 04:51 AM  9 years agoPost 12
Gregor99

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Western Wa

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Dang!

Revolectrix Beta Team

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06-07-2009 08:52 PM  9 years agoPost 13
Gregor99

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Western Wa

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Just heard back from Xtreme. The 10mm boom block is production now. Expected soon. How soon? I have no idea.

Revolectrix Beta Team

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06-07-2009 09:08 PM  9 years agoPost 14
Heli_KV

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Ottawa, Canada

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Wow! Great news! I hope it will not require new 10mm frame.

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