|
|
Post by Jerrymac on May 4, 2011 1:02:24 GMT -5
Jerry, Ask away! I'm here to help everyone, even staff! LOL!!!  Scott Hehe, very funny. Good on you Scott.... I don't mind asking questions, after all, there is always a lot to learn in this hobby. Anyhow, thanks bro. Can't wait to spool it up for the first time, and track blades and trim it out if need be. Of course, I am so good that the blades won't need any tracking adjustment and it will hover hands off without any trimming needed, LMAO..... Probably left a screw loose somewhere and maiden will end in a crash.  Anyhow, in case anybody is wondering, as equipped in the above photos, with all electronics, 6s 2500mah and 3s 1000mah batteries, and Fusuno fiberglass canopy installed, the RFT weight comes in at 2302 grams. One of these days I will have to weigh my plastic framed 425 and 550 to see what they weigh in comparison. Although my 425 only uses a single 6s 2500mah battery and no rx battery, and the 550 uses 3300mah batteries and a 2s 2500 rx battery, I am curious of what they all weigh. Now it's time to go 'fizz-can' a little paint on the white parts. |
|
|
|
Post by Jerrymac on May 8, 2011 23:26:12 GMT -5
I finally made it out to the field today after the long winter and flew some basic flights with 4 of my helis. I also spooled up the new HeadHunter '500' for the first time. Blade tracking was spot-on. I need to make some changes with the tail though. The tail was crazy out of control. I put 84mm tail blades on it, but, I can see that they are too big for the head speed I am running. The tail wagged very hard with gear end point at only 30%. At 20% it was still wagging violently. Even at 10% it still wagged. A very light touch of the rudder stick and it piro'd so fast it made 2 complete piros before I could release the stick. I am talking "blazing" piro's!!! I have a spare set of 70mm KBDD tail blades that I will put on to try to tame the tail down. Because of the tail wag issue, I didn't really get to fly it around, so, will update when I get to try it out with some smaller tail blades. |
|
|
|
Post by dunkonu23 on May 9, 2011 3:42:59 GMT -5
It's good you got out and flew some, bro!! I'm sorry about the tail. I think once you get it sorted you'll find the tail to be one of the best you've ever had. I know on my 550's I'm running KBDD 92mm tail blades and they work so darn good, it's scary. Rock solid tails! Keep up the good work, bro. You're gonna have to... I'll be out of action for at least six weeks starting Thursday.  Scott |
|
|
|
Post by Jerrymac on May 23, 2011 3:44:02 GMT -5
Thought I would post an update on my HeadHunter heli build. I put some 70mm tail blades on it and took it out Saturday for another test flight. It only lasted about 10 seconds. I spooled it up to a hover about 20 feet up and the tail started wagging violently. Before I could try to get it down, it started to piro out of control. I hit TH and tried to get it down safely, but when I flared near the ground it spun hard and tipped over. Snapped one of the blades off at the grip, bent the flybar, and the tail boom and sheared the plastic bolts off holding the landing skids on. After looking it over, it seems that I forgot to loctite the grub screws that hold the tail hub onto the tail shaft. The whole hub and grip assembly slid off of the tail shaft. Sunday, I replaced the tail boom, flybar, and main blades, and bolted the skids back on, then took it out to the field along with 3 other helis. It flew great, although I need to play with the gyro gain just a little as it had a very small bounce after a piro. Cyclic response is very crisp with the direct to swash servo set-up, even for a 500mm bladed heli. It practically hovered by itself too, although the wind gusts made it climb a little, it stayed real steady. I had some woodies on it 'just in case', and it made some awesome "blade farts" when pulling out of a big loop. ;D Overall, I am very happy with the first real flight. I will be upgrading my plastic framed 425 to a HeadHunter frame as soon as Scott has them available.  |
|
9sec240
Full Member
naturalasperiphobic
Posts: 261
|
Post by 9sec240 on May 23, 2011 7:28:46 GMT -5
Jerry, it looks like you are running a Hyperion servo on the tail? I tried looking around to find which cyclics and tail you were running but only came up with pictures.
|
|
|
|
Post by Jerrymac on May 24, 2011 0:15:25 GMT -5
Yea Ivan, I am using a DS20-GMD on the tail coupled to a JR G770 gyro. The cyclic servos are Spektrum DS821's.
|
|
|
|
Post by Jerrymac on Jun 11, 2011 22:43:20 GMT -5
Time for another update on my HeadHunter build. I got my 3 new 6s 2650mah batteries this week for the HH 500. Had to move the battery around a little to get the CG right as the stated weight on the website for the battery was 450 grams, but in fact they only weighed 405 grams. Had to slide it forward about an inch or so to get the CG right.
The piro rate is still blazing fast even with the 70mm tail blades and rudder end points at 80%. Gyro gain is at 26% on the gear channel and holds like a rock with just a tiny bit of occasional wag, so I might have to lower the gain a few clicks.
With the Z-30 1100kv motor and 15-50-20-61 gearing, and +- 12 degrees pitch, the collective response is scary in idle 2 with 100% straight throttle curve. The cyclic response on this thing is even faster than on my BH 450SE. It will do stand-still stationary back flips like you were holding it in your hand flipping it over.
It is hands-down the fastest and most responsive helicopter in my fleet. It is even more responsive than my 425 that is running a head speed of close to 3000rpm.
Scott, if you can hear me, I am waiting on another HH frame upgrade for my 425. ;D
|
|
|
|
Post by dunkonu23 on Jun 12, 2011 10:38:25 GMT -5
LOL! That's great to hear, Jerry. I told my metal guy to hold off while I was recouperating from surgery because there would be no way I could test parts. Time to get going on it again. Gotta get you a 425! I've got my 550 for FBL geared at 14/42/20/61 and it's insane in the collective. I had surgery just after I finished it so I have yet to take it to the field to fly. I'm certain cyclic is rocket fast, too... with the proper FBL setup. I have collective set for +-14 and cyclic at 8 degrees. I'll probably lower collective somewhat, but who knows... maybe I'll love it. Scott |
|
|
|
Post by Jerrymac on Jun 12, 2011 12:11:56 GMT -5
Well Scott, I hope your shoulder heals up soon before you miss out on too much of our short flying season up here around the lakes.
It is very windy right now, but if it calms down later this evening I will probably go back out to the field again today.
Saturday afternoon I took 4 helicopters and 22 batteries with me but it started getting dark after 14 flights. I still have 8 batteries charged that I would like to 'fly out'. I hate wasting a cycle by having to discharge them on the charger, and weekends is the only time I can get out to fly.
|
|
|
|
Post by dunkonu23 on Jun 12, 2011 13:38:15 GMT -5
Well, that's stick time for you, bro... 22 batteries? I don't HAVE 22 anything. Good luck today with the wind. I'm watching the Canadian Grand Prix and they're in a downpour. I think they've got what we had here yesterday. Sometimes, it didn't even show up on radar... it's showing up there, though. Scott |
|
|
|
Post by Jerrymac on Jul 1, 2011 3:03:56 GMT -5
Ha, well the HeadHunter 500 is now PERFECT. With a 3s 1000mah rx battery mounted under the battery tray, and the 6s 2650 on top, the helicopter is perfectly balanced. Wind was dead calm today so before leaving for work I took it out in the back yard for a hover flight only. (very small yard). I think it may have set a GHT record for hands-off hovering with a flybarred helicopter. I took it up about 10ft then got it into a nice stable hover and let go of the sticks, then did the one-thousand-one, one-thousand-two, one-thousand-three, etc, thing. Zero trim on elevator, aileron, and rudder. It was an amazing 14 seconds before the entire rotor disc appeared to move out of the original area of the rotor disc. Maybe not a complete stand-still hover but certainly no need to touch the sticks for a drift the distance of the rotor disc. I still didn't touch the sticks for a few more seconds, but once it started to drift a few feet away I corrected it so it would not get out of the fenced in area of the yard where I keep my beagle. I have already flown it many times at the field and it flys great, but I never had perfectly calm winds to see how well it hovered on it's own. It hovers like a coax. ;D BTW, just to compare, my plastic framed 550 will only hover hands free for about 5 to 6 seconds before moving out of it's original rotor disc area and the disc is bigger.  I know that Scott is currently recovering from shoulder surgery and it may be a while before he has HH upgrade kits available again, but when he does, I would highly recommend them to anybody that has a plastic framed Hurri and wants to upgrade it. You won't be disappointed. I have first "dibbs" though, lol, as I am waiting to upgrade my 425. ;D Jerry |
|
|
|
Post by dunkonu23 on Jul 1, 2011 9:29:59 GMT -5
Jerry, That's a long time!! 14 seconds? Wow! That's not the frames, though... that's your setup, bro. It must be perfect. I hope to have parts soon, but with the way things have been going, you never know. Being on short term disability sucks. Regardless, I'm going back to my day job on July 18. The first set is yours, the next one is Robs. Scott |
|
|
|
Post by Jerrymac on Jul 1, 2011 23:37:28 GMT -5
Yeah Scott,
I am sure the set up has a lot to do with it, but none of my plastic framed Hurri's even comes close. I was amazed. It just sat there hovering away on it's own.
I think the direct-to-swash servo set up might have a lot to do with it too, as there are less moving parts, so less chance of any slop between the servos and the swash.
|
|
|
|
Post by dunkonu23 on Jul 2, 2011 0:38:45 GMT -5
Good deal. Scott |
|
|
|
Post by Jerrymac on Oct 12, 2011 2:55:30 GMT -5
I just thought I would update this thread since Scott recently posted that he is beginning to get the needed metal parts to hopefully make HH frames available again soon.
I usually take 4 or 5 helicopters to the field with me, so none of them get flown exclusively each weekend. I have about 40 or 50 flights on the HeadHunter and it still flys just as perfect as it did when I built it. The only thing I have done to it, is to re-tension the tail belt, and oil all of the bearings after about 20 or so flights.
Although there are lots of upgrades available for the Hurri 425/550, this is THE BEST upgrade you will ever make to your Gaui Hurricane.
Just a note, since I have been questioned about this numerous times. I personally have nothing to do with the manufacture or sale of HeadHunter frame kits. They are offered by HeadHunter Helicopters, which is solely owned and operated by Scott , better known on the many forums as dunkonu23.
If you have build questions, I may be able to help as I have built one. If you have questions about availability and pricing, please contact Scott as I cannot answer those questions for you.
Buy one, build one, fly one, then grin. ;D
Jerry
|
|
