anyone ever tried the scorpian hk 3026 1210kv

[kahn10]

just ....cos.its not like i've got one in my hand having just done the bearings and shimmed it...and wondering what it'll go like......

[venture 50]

I talked with one guy who had one and he said it had good power and he liked it but.....

[OzDruiD]

I also have one .. bout to put it on with a 13t pinion. Really wondering what they are like compared to the Gaui SuperPig - both in performance, battery use \ flight times, heat etc.

Beginner - hoving \ learning circuit work. Wanting to save my batteries \ get more efficency etc

[ke6d]

I have a couple hundred of flights on mine. Replaced the stock bearings with ceramic bearing after the first 100 flights. This motor is small and has a lot of power. You need to use the 50T front to gear it for 2200 rpm headspeed.

I run mine between 2100-2200 rpm governed. I can fly medium acrobatics for 5:00 - 5:30 minutes on a set of 3200 mA packs.

[kahn10]

thanks ke6d....thats what i wanted to hear.i couldn't get over how small it was compared to my gaui 1100

marco

[OzDruiD]

Convinced me enough that today, with the help of a fellow Hurri Enthusiast we bolted on a 3026-1210 to my hurri. Sounds SWEEEEEET. Lost light though and trim and test will have to wait for another day, but spooling up without mainblades etc to check gear mesh and the like - all sounds very promising.

Yep, I ran a 13t pinon, 50 main, 61 rear and I cant remember, its either a 19t or 20t OWB - basically stock from the supplier so i am guessing a 19t OWB - but its still going VERY strong after heaps of crashes and plenty of flights, so might be a 20.. who knows.

Pics to follow once i sort out this camera.

[kahn10]

oz...ya sparked it up with blades yet?goddamned weathers crap here

[OzDruiD]

No mains, just with flybar and doing spoool up tests. On the same job, I swapped out a smashed swash to a Trex500, replaced the pitch and roll arms to metal ones, replaced the plastic washout pieces with all metal, redid all the bearings and links.

The tail section also got a once over and I put the lightweight paddles and rear tail blades on. I must say, not a fan of the Gaui Light weight flybar paddles \ silver stickon etc. Might look at some better ones.

Basically, a big OVERHAUL .. so yeah tommorow is the big day at the club field, so hopefully thrash some air into submission tommorow.

[OzDruiD]

Still working out gear ratio's too. Somehow screwed up the maths with the pinon and stuff - so looking at that again. Going to give

13t Pinion, 19t OWB, 50T front gear, 61T rear gear for around 2067 HS, 95 efficency on the Scorpion 1210KV, at full pack voltage. Approx 2000 RPM is good for me at the moment. Gives a Gear Ratio of 12.35

Pic as promised.

[kahn10]

95% efficiency on the scorps a little hopeful bro...think 85's closer.you running your phoenix on fixed rpm?

[nordica155]

Just fitted one too. Does look small though. waiting for the wind to die down to test it. Got it on a 14t and standard gears so expect head speed to be exciting

[kahn10]

heh heh....know what ya mean.i don't know wether to put mine in the 550 ands aim for 2300......or throw it in the 425 frame and try 2600-2800

[nordica155]

Ran it last night, head speed seems fine to be honest, nice and responsive with plenty of punch. Had a few problems since the rebuild so didnt get to time a full batt will try today. Have CNC MRB holders and trex 600 CNC TRB holders, so high speed not a concern.

[OzDruiD]

Originally Posted by kahn10

95% efficiency on the scorps a little hopeful bro...think 85's closer.you running your phoenix on fixed rpm?

Ok, so whats everyone getting for a headspeed. I used the 13t Pinon and found it far too low with a 50gear, 61 rear gear. With the 14T Pinon back in, HS feels just ok now - feels just around the 2000. I havent tach'd it yet .. but still. Seems oddly very low with the 13T Pinon in it.

Which is very odd.. its not how the calculator worked it out.

Bugger of a thing, seems i might have the dreaded tail kick out issue. Not enough research into it yet, definitely kicks out and seems to possible have a slight bearing squeel at certain RPM - however I have replaced the one-way and block bearings etc. Very wierd.

[ke6d]

Originally Posted by OzDruiD

Ok, so whats everyone getting for a headspeed. I used the 13t Pinon and found it far too low with a 50gear, 61 rear gear. With the 14T Pinon back in, HS feels just ok now - feels just around the 2000. I havent tach'd it yet .. but still. Seems oddly very low with the 13T Pinon in it.

Which is very odd.. its not how the calculator worked it out.

Bugger of a thing, seems i might have the dreaded tail kick out issue. Not enough research into it yet, definitely kicks out and seems to possible have a slight bearing squeel at certain RPM - however I have replaced the one-way and block bearings etc. Very wierd.

I set mine at 2100 rpm on 13T/50T/20TOWB on Phoenix ESC set rpm governor mode. I checked the headspeed with a Skytach and the headspeed was dead on. Are you sure your battery packs are up to the task.

With a 14T pinion, the headspeed is in the 2300 rpm range and sometimes the tail may kick

[OzDruiD]

I might need to fix my signature.. i dont have a Phoneix ESC... I have the Phoenix simulator. I run the stock gaui 75A ESC and a CC 10Amp BEC, no RX pack, just 2 x Zippy-H 3300 mahs in a 6s configuration. Your right - my lipos are a bit old in the tooth, but still freshly charged, 4.20 balanced 2 x 3S (as a 6S) packs of 3300mah should realistically give at least a minute or two at decent headspeed.

At the field, even with a 14T Pinion \ 19 OWB \50T Main \ 61 rear - expecting around 2225 off the calculator for 95% motor efficency - but experienced people on the field feld it was 2000 or less, so at 85% efficency - its 1991 HS.
It all depends on how you calculate the efficency of the motor. If i use the suggested 85% efficency, 19T OWB, 50T front gear, 61T rear gear and 1210KV at 85% - its only 1849 on a 13T pinion, 1991 on 14T pinion. Either way the new headspeed with the 14T pinion "feels" right and others that have flown it believe the HS is about right for my level of flying. Pity I havent actually been able to "tach" it - I might have to that to see if the tailkick is linked to a HS of 2300+ - but it looks, feels and sounds WAYYY slower than that.

In two days I will purchase some good quality, INA one-way needle bearings and fit them to a 19T gear, or even a 20T if i can find one where the OWB is already stuffed. I will put that in and swap out the block bearings again to see if that fixes the tail kick.

Pls explain the tail kick at 2300 ? Overdriving the tail or something?

[mjdee14]

Originally Posted by OzDruiD

In two days I will purchase some good quality, INA one-way needle bearings and fit them to a 19T gear, or even a 20T if i can find one where the OWB is already stuffed. I will put that in and swap out the block bearings again to see if that fixes the tail kick.

Pls explain the tail kick at 2300 ? Overdriving the tail or something?

Be careful with the 19t...they crack real easy.....the 20 is the only one to use if possible.

I have switched to the t600 tail holders and blades. they have good thrust bearings and never had a problem. not sure why the 2300 mark causes problems....

[mysticmead]

supposedly, at a high enough head speed the stock Gaui tail will bind causing the tail to kick... it hasn't happened to me so I can't confirm it or not...

[OzDruiD]

Ok so today i was back at the field, yet again trying to solve this tail kick \ glitch out.

So, All new bearings in the front end - bottom mount, OWB, middle mount, top engine mount etc, all replaced - and after i pulled it apart after today, they STILL all feel good, especially the new INA OWB.

Still - the tail is kicking out in Normal and Idle up. It looks SO close to being a OWB slipping its not funny - but its hard to agree to that as we have replaced the OWB with 2 x Gaui original 20's, 1 x Gaui 19T and now after market german made INA one-way bearing mated to a Gaui 20T OWB gear mesh. The "special" OWB we created still feels great. silky smooth, but obviously I cannot get the same amount of "pressure" with my hands - that it undergoes bolted in the heli to try and cause it to "slip".

I notice the shims that are on either side of the OWB are just plated .. and that silver plating is flaking off, so I am concerned that small pieces of that are falling \ being sucked into the OWB needle bearings and preventing them from "locking up' - as I have the occasional motor "free spooling", blades not swining - and the the OWB gear appears to be spinning on the shaft.

I know that means that it normally means that the OWB is stuffed, but with that many replaced and now good quality OWB's - Can it be anything else ???

Once it does lock up and grab- the blades start to swing and spools up fine, but still has those small tail kicks in the air etc.

In regards to "lubing" the OWB - whats the generally acceptable belief? As yet, I have not especially lubed the OWB with ATF as I was told the Gaui ones dont like it...

[Mikej]

With the Gaui OWB's the general advice is not to oil - not sure about your special I'm afraid.

Have you tried grounding your boom to the engine mount - just rub some of the paint / annodising off the boom, put a bit of wire going to the engine mount. Since I made this mod my kicks disappeared.

Mike.