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Home✈️Aircraft🚁HelicopterKyosho Caliber/Quest Neo-Caliber series › Caliber 5 possible issue....
05-26-2007 02:30 AM  13 years ago
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shesha

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Caliber 5 possible issue....
I managed to get some flying with the caliber5 today, man the huge difference between the the c30 and this, no tendency to pitch up, and just FFF on rails, let alone the banking.

1- Anyway whilst doing some backward flips, I noticed that once the heli is just about to be exactly inverted, the heli pitches to the left whilst inverted, so much so, that it would not be possible to go for another flip, without first settling into a hover.

Looking at my transmitter, am not to pleased with the amoutn of trim i have on the heli, so i am going to go over the servo horns and linkages once more,......

2- The tail seems to be not holding to well, am running JR G490T with 810G servo, 7.4 volt lithium ion duralites with regulator to 5.1 to power everything.

The mechanical setup is spot on, in rate mode at 50% the heli hovers with no yaw.

In heading hold mode at 75% full climb outs is okayish some tail wag, whether I bump up or down on the gain, the tail wags in abrupt positive and negative pitch commands, am guessing a definciency from the gyro ?

The tail rotor blades are maericks....

Any advice from anyone would be appriciated.
Zero bubble....
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05-26-2007 04:42 AM  13 years ago
dkshema

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Cedar Rapids, IA

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Too much cyclic in your swash, binding the rotor system perhaps? JR 490 Gyro, maybe?

I've not encountered this with my C5, stock TR blades, GY401/9254 combo.

-----

And that YS is a sweet running 50.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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05-28-2007 06:05 PM  13 years ago
dkshema

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Shesha, any idea what your head speed is? I've got my C5 running pretty sweet right now, +/- about 11 degrees of pitch, about 6 degrees cyclic, the 9.1:1 gear ratio and the YS has my rotors running about 2000 RPM. Radix mains and it is one fine flyer. Smooth as a baby's bottom in the air, responsive, and no bad habits.

Any upgrades I add will probably be some 95mm CF blades (perhaps Radix, again) and most likely an MP2 muffler. And eventually better servos than the DS811s.

I was out flying in what has to be the best (so far) day of the year yesterday. Low 70's, no wind, blue sky. My C5 got 5 flights, my EVO got only one for the day, and it sat on the ground, pouting! As for that EVO, someday I'll have to treat it to a set of delrin gears. Those stock plastic babies are really starting to scream in the air after four years.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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05-28-2007 09:26 PM  13 years ago
shesha

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Dave, I got my head speed tached at 1720rpm, running -/+10 of pitch, no bogging on the os hyper50, stock 9.6:1 gears and stock muffler, running revmax on 75% in ATV. Fuel 30% nitro heli coolpower, with os 8 plug. MR Blades are 600 Radix, and tail blades are mavericks 95's. cyclic on 6 if I recall.

I am about to build my second C5, now which will have the YS50 as the powerplant, with the exact same setup as the one i mentioned above, except for headspeed adn te muffler most likely the mp2.

I am looking for the new counter gear to tryt it out, but still cant find it anywhere online.
Zero bubble....
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05-28-2007 09:33 PM  13 years ago
slow

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EMS or MMS setup ?

/James
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05-28-2007 09:42 PM  13 years ago
shesha

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EMS...for both...Zero bubble....
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05-28-2007 09:44 PM  13 years ago
slow

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Make sure the swashplate stays level throughout the entire collective pitch-range.

What might seem like an insignificant little tilt of the swashplate whilst bench-testing will show upp drastically in the air.

/James
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05-28-2007 10:43 PM  13 years ago
dkshema

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Cedar Rapids, IA

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1750 just might be too slow, unless you can maintain it in all flight conditions. That extra 250 makes for a much perkier machine.

The gear can be had directly from Kyosho America online, though that's not quite in your neck of the woods....

Perhaps I can get a couple and send them to you.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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05-28-2007 10:50 PM  13 years ago
shesha

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Dave thanks, I can order from any place in the US, I have a mail forwarding us address that they get sent to in Florida .

Actually the head speed is controlled by the revmax, through the flight modes, I was thinking of pushing it to 1800 and fly from there, though I do not notice any bogging from any manouver, be that stationary flips, rolls loops pirouttes flies really nice.

I dont know maybe this weekend as in thursday and friday I might be able to get some flight early morning before the heat kicks in.

Kyoshoamerica is out of stock on the counter gear checked last night, will have to wait when they are back in stock, might check cyberheli and see what they have in stock.

Slow thanks for the input am going over the bird in a few minutes and see what I come across.
Zero bubble....
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05-28-2007 11:09 PM  13 years ago
shesha

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One more thing I forgot to mention, the paddles are TT ultra light slim green.Zero bubble....
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05-29-2007 03:08 AM  13 years ago
shesha

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Could a C.G issue be affecting this, as I was going over the heli, with a full tank the heli was way to nose heavy.Zero bubble....
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06-02-2007 01:10 AM  13 years ago
shesha

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Managed to get a couple of more flights today about 4 8 minute flights.

1 of the flight the heli flamed out, autorotation in no worries, those radix blades sure auto in nice compared to the mavericks i was running before. Turns out at half tank the heli went lean resulting in a whitish coil plug.

Replaced it with a new one and richened the needle a little more.

Did a double check on the servo horn since I was still getting some tail wag, found out that the servo horn hole where the z bend goes in was warn out, about 1mm of play in any one direction, funny how i overlooked that part last time.

After replacing the servo horn heli did not wag at all, but at one of the vertical pulls, going into negative pitch just before getting into a stall the tail wagged, and even on it's way down.

In hard sudden turns (banking) the tail sometimes wags, pushing the gain a little up seems to have solved the problem.

Am seriously doubting this gyro's ability to perform, am going to swap out the gyro for a GY401 and see what the result comes to.

Overall the flying was great....
Zero bubble....
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06-07-2007 06:15 PM  13 years ago
shesha

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Okay a couple of more flights today, this time I got the rpm to 1850, atv on rev max at 85%, FF tail is locked in, going into consecutive flips is causing tail blow outs. what looks more like a tail wobble, or any hard negative positive collective moves will cause the tail to wobble or blow out.

1850rpm on the caliber is definetly much better in flight performance, tommorrow will push her to 1950rpm or 2000rpm, at 1850rpm the engine was tuned slightly on the rich side, temp gun reading 178F back plate count was approximately 4/5 seconds.

Am working on my tic tocs, the sequence is still not there seem to be pushing the elevator too early, but with the higher rpm it was much easier to manage then 1750rpm.

Funnels are getting better and better this caliber5 has really accelerated my progress for sure

Just thinking about the rpm, the os50hyper manual states that the maximum rpm is 20,000rpm with a gear ratio of 9.6 that would be 2083rpm on the MR blades, wouldnt 2000rpm be really pushing the engine ?
Zero bubble....
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06-08-2007 09:00 AM  13 years ago
shesha

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okay 1850rpm is sweet for this machine, engine is relaxed and the manouvers can be excuted without any bogging.

The tail wagging in hard manouvers went away, i dropped the gain a little and voila, am still going to consider swapping it out for a gy401 in the future.

For the time being more burnign fuel.
Zero bubble....
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06-09-2007 12:55 PM  13 years ago
shesha

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Ehh, you would not believe what the problem was, something I overlooked, the TR blades were installed reversed.

Talk about tail being locked in now....

Well hey, atleast I know you can fly the heli with reversed tail installation
Zero bubble....
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06-10-2007 05:35 AM  13 years ago
dkshema

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Cedar Rapids, IA

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Oops. That's an easy one to overlook!-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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