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Posted by Flying Pitcher | Jan 24, 2015 @ 06:13 PM | 3,298 Views
low headspeed hover 600 size heli (3 min 4 sec)

pretty stable hover
Posted by Flying Pitcher | Jan 20, 2015 @ 05:34 PM | 3,191 Views
alright!! did a little mod today. As most people know, RJX stock head dampers are VEERY stiff and if you drop the headspeed, then you get this wobble or shake.

I grabbed orange material that i had, it's a rubber tube that i had in my garage forever, so i cut it down to size and fitted into the head instead of regular dampers. I actually had to cut a little linger length, cos it was a little small on diameter and would play in the head, but once it was longer and i squished it with feathering shaft bolts, it was all good. Actually fairly rigid compared to what i thought it would be.

They feel like a sausage in the fingers if you squeeze, compared to regular dampers the stock RJX head has, which are like rubber tires in comparison

anyways, here's the specs and vid i did.

600mmblades (RJX600)
800kv motor running 6s regularly(3s for the low headspeed test this time)
10t pinion | 100t maingear helical
5000mah 6s 25Cbatt regularly (3s 4000mah 30C for this headspeed test in vids)
Headspeed ~1700 regularly (870 this time)


P1080620 (1 min 27 sec)
P1080621 (1 min 5 sec)
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Posted by Flying Pitcher | Jan 19, 2015 @ 02:54 PM | 2,678 Views
have a look!

450 heli
P1080612 (0 min 58 sec)

P1080611 (1 min 1 sec)
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Posted by Flying Pitcher | Jan 18, 2015 @ 08:49 PM | 2,597 Views
Decided to add a coat of automotive paint to my blades. I usually crash 'em shortly afterwards though

anyways, I paint blades so they look kewl when rotating. effect especially visible when on camera. I painted them opposite angles and slightly offset to maximize flicker when flying. maybe will do vid of what it looks like. they need to dry for some time, but to be honest, i've flown next day without probs but tomorrow work, so meh..

Posted by Flying Pitcher | Jan 10, 2015 @ 09:13 PM | 3,173 Views
decided to snap a shot before leaving today and it came out nice. added little text here and there to make it "pop"

Posted by Flying Pitcher | Jan 03, 2015 @ 05:30 PM | 2,472 Views
Well, my heli survived 100 flights and lived long enough to tell about it

101 technically. And quite ironically, it flies better today than on the day it was built largely due to dedicated tail servo..

Posted by Flying Pitcher | Jan 02, 2015 @ 03:04 PM | 2,691 Views
Hey everyone! So exxcited. It's a very long story, but anyways, thx to John(owner) @ audacity/promodeler for a very generous upgrade above and beyond!!

he also added a mint candy to the ordersorry no pic, i ate it already

anyways, this thing goes straight into my RJX600 tail!! Drivetrain inside the servo is so smooth

here's how it holds. This is at low rpm too i'm running 800kv instead of 1100kv.

Result for calculation:
Estimated lowest voltage during flight: 20,04
Lowest RPM (due to voltage and efficiency) : 1362

(calculated for 100% throttle curve)
Hover RPM at beginning of flight: 1885
Hover RPM at middle of flight: 1736
Hover RPM at end of flight: 1676
I reset my tail settings to defaults and didn't tweak anything in my tail! I was even able to get my tail gain up high!! this is almost scary!!

solid tail!! (1 min 50 sec)

Posted by Flying Pitcher | Dec 30, 2014 @ 11:06 AM | 3,273 Views
Well, it's a long story(i'll make it short) and started off when I was getting ready to build a 600 size helicopter. RJX 600.

I was going to do "economy" servos on the sticks, but was convinced by some people here that it's not worth it to have cheap servos, because if they fail, the heli to repair will cost much more than money saved on servos, so I was recommended to use promodeler servos instead from They've been excellent! They center well and survive crashes well as well. Ask me how i know.

But the main reason I feel that I need to write this thread is because of the recent experience I had with customer service.

I started having little twitching on tail from the servo, so before "trying things", I decided to contact audacity, because their servos are warranted for 1 year, which is awesome! you usually buy stuff and then you have to go through 50 million videos to prove it's broken or have to bug the seller 'til death to have issue fixed! many times, you're often left with nothing else to do, but buy new because seller would not respond. seen that? i have.

Anyways, this is not the case with Audacity! I sent them e-mail and received a reply less than 1 hour later. 50 minutes to be exact!! it was Friday, 26-th, I didn't expect anyone to reply to me because I thought everyone was still in the "after Christmas rest" Get this, fellas, I actually got a reply from the owner himself. here's the quote:
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Posted by Flying Pitcher | Dec 29, 2014 @ 05:08 PM | 2,768 Views
the pic of the motor i was talking a little earlier.

quite suitable for my park flying.
Posted by Flying Pitcher | Dec 22, 2014 @ 05:59 PM | 2,914 Views

sorting out tailwag. stock settings were fine for swash, but tail was wagging and it was increasing to a point of "wag of death". it would increasingly oscillate to a point where it's uncontrollable. that means you have to land

EDIT: i think wag is here to stay. one of the members decided to experiment and put a cyclic servo on his tail to see what happens. Same thing, wagging! K-bar probably doesn't like cyclic servo on the tail. wants something faster. I got the wag to a minimum now...well, compared to what it was, but it's still there.

here are the settings i had to settle for:

Posted by Flying Pitcher | Dec 06, 2014 @ 01:56 PM | 2,654 Views
well, got myself a new motor. Turnigy SK3 800kv. it is rated for 6-10 cell batteries and I will be running it on my 6s setup. Did a couple test hovers and i was pretty happy. Got 8minutes 55 seconds of hovering in the backyard. Full 100% throttle.

Posted by Flying Pitcher | Nov 01, 2014 @ 08:59 PM | 3,184 Views
little hover in the 25knot winds that's about 28 miles per hour winds with gusts..
Posted by Flying Pitcher | Sep 06, 2014 @ 07:09 PM | 3,324 Views
well, haven't updated this page for a while, so just decided to run some tests on different throttle curves and how much power they'll pull.

I tried:
65% - 41 amp draw
70% - 45 amp
75% - 52 amp
80% - 54 amp
85% - 57 amp

tried 90%, but doesn't switch...probably because governor needs some headroom.

here i tried 80, 85, but couldn't switch to 90%, so landed, took off again, thought idle switch went bad, set curves to different position, still won't switch into 90, not even o well, i decided

anyways, my preference is flying 65% throttle. I know that if i go higher, then difference between amp draw is minimal between switches and ESC is more efficient, but all those amps still add up and take away flight time. I do soft sport flying, nothing 3d, so it suits me oh...if windy i go into 70%...
Posted by Flying Pitcher | Jul 27, 2014 @ 02:32 PM | 4,068 Views

canopy: glued/fixed
right frame: fixed
right landing skid: fixed/straightened
right landing struts: like $1 (lexan from home depot)
2plastic linkages: had spares with kit
servo arm: turned over as it has 4 arms
5 bearings: $5
CF blades: $25
1 tailbrace: $3.50
1 mainshaft: $7.50
1 feather shaft: $3.25
1 tailboom: $6.50
1 swash: $47.80

$99.55+ shipping.

still a healthy bill, even though i "salvaged" quite a few parts, such as canopy and frame. some spares come on pairs, such as mainshaft, boom, braces, so since i used only one, i posted half the price.

realistically, i spent little over $200 on everything, but because i ordered a new canopy just in case, which is now sitting in reserve and another set of CF blades, also linkages and some other stuff.

It's one of those hobbies where you "accumulate" stuff over time, but trying to keep it to a minimum. i have about 4 booms left and i believe 5 braces and some other things.

happy flying heh.
Posted by Flying Pitcher | Jul 03, 2014 @ 08:38 PM | 4,203 Views
Stupid me...lost orientation in flight today. I was doing a slow pass 2 o'clock high and started to turn her around, but looked like tail went the other way, so i gave it rudder to wiggle, but couldn't tell!! I panicked as I couldn't figure out which way to correct. It looked like rudder was going the other way!! Heli started to tilt and i was losing altitude and not level. I dumped throttle hold in place and she went down on her right side from a height of pine trees...30-50feet?

I thought my receiver glitched, so i grabbed little heli...450 and went to recreate the scenario...stupid me...same thing, it's hard to tell, but when you just have silhouette against grey cloud and no sun shining on the heli from your side, i totally can lose orientation...heli looks like it's the opposite direction when it's JUST at the right angle!!! I made the same slow high 2 o'clock pass and started to do a turnaround and there!! i almost lost it again, but I saved it with a high G pullout. I feel bummed right now here are pix:

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Posted by Flying Pitcher | Jun 14, 2014 @ 09:11 PM | 4,578 Views
just did a little mod for the landing gear...

got this material over at LOWE's....also available at home depot(i think). plate is $4.xx something...

used a tool to sand them pretty good actually. no need for a saw...which would probably work better i guess....but o well, tools left at work over weekend

here they are....braces
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Posted by Flying Pitcher | Jun 09, 2014 @ 05:20 PM | 4,479 Views
well, this was bound to happen sooner or later i guess. i went out for a flight today with my little one and a big one. flew the little one flawlessly and first battery with a big one. Last flight i was flying with higher RPM and was doing some aggressive accelerations. During a turn-around i noticed RPM's starting to drop and realized it's going down...

it was over large pile of empty crates and some garage nearby. Knowing that i have to make it back to the grassy land, i dropped collective and dove forward towards me trying to get it over the fence and to the grass. By that time, RPM's were too low for a forward flight and i started transition into autorotation and was going down with low rpm's. right before impact, i gave hard collective and she went in almost flat on the skids and impact happened....

I ran to the crash site looking frantically for survivors... here are the pics...

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