Bad words about Hurricane 550?

[Turbojoe]

I've watched all of the Finless videos and read about the various little problems that some have had. Post what you have run into with your Hurricane 550 and what you did to alleviate those problems. PLEASE EXCLUDE radio problems as these probably have absolutely NOTHING to do with the heli design.

Joe

[BlenderPilot]

Even before my first crash in the bushes i had a little problem concerning nose attitude. It would jump randomly as if it was caught in the canopy plastic. Today i decided it was time for a 5 hrs inspection...

What i found was shocking. Cyclic link to the AFT (elevator) was commanded only by the friction of broken plastic elevator.

The experience i have tells me that this wasn't a one time brake, it was made through many cycles, as the plastic is very torn.


http://i97.photobucket.com/albums/l236/BlenderPilot/Show%20and%20tell/Modeli/Hurricane%20550%20Build/DSC02148.jpg


I was in doubt of ever using CNC elevator part, but this is now a necessity. Safety first. A bit of hole modification on the servo wheel should sort everything out. Even if this is not a design error, it's a huge weak spot.

[dutch_anykey]

Nice,

I was already wondering why the heck that part was availlable in CNC... This makes it al clear.
Thanks for the picture !!!

Maurice

[dutch_anykey]

Some additional info.

I mailed to infinittyhobby a while back. It was regarding the offset holes in these levers. But it helps regarding this problem. It seems the new spares are improved already (the plastic ones)
If you are going to order the CNC version be aware that this doesnt has the holes in offset:

From Infinnityhobby:
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Hi Maurice,

No, the new 204514 is with the same shape and offset holes. Just the new one is enhanced in strength of its plastic material. We now sell only new version of 204514 even customers choose original 204514. Thank you for your query.
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on the cnc version:

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Yes, you are right. The CNC Elevator Lever [204614] is without offset, that is different from plastic version.
----------------------------------------------------------------------------------------------

Maurice

[Turbojoe]

That's a scary picture! I hope mine comes with the updated part. If memory serves me Bob said something about the elevator lever in one of the videos. I know he really liked the CNC anti rotation bracket and recommended it as a first buy.

Joe

[BlenderPilot]

I really hate the 42T gear. Either the motor shaft has slack or the gear is really soft. The most flight time i got from it was 6 hrs and than a crash...

http://i97.photobucket.com/albums/l236/BlenderPilot/Show%20and%20tell/Modeli/Hurricane%20550%20Build/DSC02226.jpg

[BlenderPilot]

I have finally got to the bottom of this never ending saga that has eaten away three 42T gears in a matter of 70 flights. The upper free willing bearing was rotten from the first minute i took hurricane to the sky, that is the only way to justify the very fast wear of the gear.

Whoever is flying hurricane, check the bearings! If you have problems with gears being eaten away no matter what you try, i bet it's one of these two bearings. These are easy accessible without taking apart the whole fuselage, but i'll check them all.

I found this defect as i was playing and turning the gears, wondering how come they wear so quickly as i saw the free-willing shaft having around one millimeter slack. Very obvious bearing defect, but it took me a long time.



http://i97.photobucket.com/albums/l236/BlenderPilot/Show%20and%20tell/Modeli/Hurricane%20550%20Build/DSC02315.jpg

[AdrianM]

The gears are weak. Most of us that are flying hard with higher power motors are running the new motor mount and longer 1st gear shaft...the stock gear still only lasts 2 flights.

These gears last: http://www.readyheli.com/Electric_RC_Helicopter_Kits_s/125.htm

[probe3]

Sweet !

What additional pieces do we need to purchase to complete a full upgrade ?

[Turbojoe]

Adrian,

Will you be doing the 42 tooth gear also?


Joe

[AdrianM]

No. There are only 3 pinions on the market in .8M (Gaui 14,15,16). They are way wrong for the motors most people want to put in the heli.

By changing the pitch to .6M and increasing the size of the gear slightly 68T (eqivalent to a 51T .8M) pilots can now use .6M Lepton pinions gears from RevCo and Hirobo. They are available in 18-26 teeth. This opens up a lot of possibilities as you can run motors from ~1000Kv up to over 2000Kv on 4S-6S batteries.

[Turbojoe]

Now it makes sense. So what pinion will bring us close to the stock gearing for those of us that are going to use the stock motor for a while?


Joe

[ukpaul]

23T is the closest I think to keep the standard ratio. For now, I'm quite happy with the standard motor & would have like a direct copy of the original 42T in delrin, but as one is not being made, I'll have to change the pinion also.

[bclong21]

ok- just to clarify the new pinion .06 , the new first gear .06 and a new main gear at .08? I am in the same boat with ukpaul as far as keeping the stock motor but when I am ready I want to bolt up a 600L and would rather do all the gears now and only have to change a pinion. Is this possible or what? Help Please!

[ukpaul]

Yes you just need different motor pinions to cope with the different kv's of the original & your intended replacement motor. The other two new gears will stay the same no matter what motor/pinion is used. The new main gear (the one on the main shaft) is .8M as per the original. As the two gears that contact it are unchanged, the new main gear needs to be exactly the same size as the original.

The new 1st gear is .6M, so the motor pinion also needs to be .6M.

A 23t pinion on the original motor will give you very close to the same ratio as the original standard Gaui 14t . As your intended 600l has a much higher kv, you just need to pick a pinion for it that will give you whatever head speed you want when using it. This gear will have less teeth than the 23t.

[bclong21]

Thanks ukpaul. I think my confusion is coming from the fact that the two new gears have 2 different degree's of teeth. Do the .6 first and the .8 main actually mesh correctly? just seems odd or maybe I don't know enough about interchanging gears to know!

[AdrianM]

The .6 and .8 gears do not mesh together.

With RevCo gears here is the setup

.6M pinion 23T for stock motor, 22T for 2300rpm head speed with 1100kv motor.

which mates to...

.6M Revco CNC 1st gear

Below this gears is the .8M auto rotation gear

which mates to...

The .8M 61T RevCo or Gaul Main Gear

which mates to...

The .8M tail drive gear.

[bclong21]

Thank you Adrian! I did not know that the stock auto and tail were .8
That has it all straight. But as the kv of the motor changes is there a calculator online somewhere to use? I have one for pinion and main gear but not for this gearing setup