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HomeAircraftHelicopterFuel-Helicopters New or Limited ActivityBlitz › HDSKULLFIRE's - Blitz Avro - Builders Page - My Avro is Flying! - Vid/Pic's Posted!!!
04-03-2009 11:51 AM  9 years agoPost 41
hdskullfire2

rrApprentice

Bethlehem, Pa.

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Just a few stat's on my Blitz Avro Build:

Received Kit: March 19, 2009
Started Build: March 19, 2009
Completed Build: March 30, 2009
Maiden Flight: April 02, 2009

It took 11 days (3-4 Hours each evening) to build.

It took 14 days from start of build to maiden flight.

One might ask if I were to build another Blitz Avro would I do anything different next time?

Answer, No..... You can't beat perfection!

Thanks Neal & Amanda

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-06-2009 02:41 AM  9 years agoPost 42
hdskullfire2

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Bethlehem, Pa.

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Hi all,

I've uploaded a few shots of my Avro in flight since the maiden flight last week.

Still working on breaking in the engine and I've got about 2.5 - 3.0 tanks of fuel through her so far.

Enjoy...

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-07-2009 12:51 AM  9 years agoPost 43
Critterracing

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totowa nj good old USA

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Lookin gooooood. What head speed are you running?

Aldo

My Gallery http://www.crispycrittershobbyshop.com/Gallery/albums.php

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04-07-2009 01:03 AM  9 years agoPost 44
hdskullfire2

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Bethlehem, Pa.

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Hi Aldo,

Haven't set up the headspeed with a tach yet. My guess it's right around 1500-1550 or so in normal mode. I have to get it on the rev-limiter though. At the throttle curve spec'd in the manual I'm running right on the fence with the low needle and hover needle, and it's making it hard to tune right now. I want to get it into a stable headspeed, setup each needle and see where it goes from there.

I might just keep the head speed limited and rely on the pitch curves only. TBD

One thing the pictures above don't show is the wind factor we dealt with this past weekend at a fun fly in Delaware. Talk about stability, this bird was able to handle 30 mph sustained winds and a few 40-50+ mph gusts at the fun fly.

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-07-2009 01:43 PM  9 years agoPost 45
Critterracing

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totowa nj good old USA

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i tryed 1500 in normal but she seemed to smooth out nicer around 1650. 1850 in idle 1 and she's very smooth. at both rpm's the fuel is glass smooth in the tank.

how far from NYC are you? im 10-15 min from the George Washington bridge. we should plan a get together sometime this summer.

Aldo

My Gallery http://www.crispycrittershobbyshop.com/Gallery/albums.php

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04-07-2009 02:34 PM  9 years agoPost 46
helipulse

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Toronto, ON, CANADA

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This is what I am running.

normal=1670, idle 1=1740 and idle 2=1820. this is with 710 radix blades

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04-07-2009 05:15 PM  9 years agoPost 47
hdskullfire2

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Bethlehem, Pa.

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Thanks Aldo & Helipulse,

I think those are the numbers I'm going to try initially and see how it goes. I know that once I put it in mode 1, the headspeed did smooth things out. But the engine was not tuned for that range yet and it kept cutting out because it was so rich and I did not have the limiter gain set yet.

I'll let you know how I make out with those settings.

Aldo, the Lehigh Valley (Bethlehem, Pa.) is about 70 miles or so from your area out off I-78. In fact, I work in Newark N.J. at NJ TRANSIT's HQ's, so that puts me only a short distance from where you are.

I will see what I can do later this spring/early summer to get up to your area. Thanks for the offer.

Thanks again.

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-07-2009 05:49 PM  9 years agoPost 48
helipulse

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Toronto, ON, CANADA

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04-07-2009 06:06 PM  9 years agoPost 49
Critterracing

rrApprentice

totowa nj good old USA

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AWESOME video

My Gallery http://www.crispycrittershobbyshop.com/Gallery/albums.php

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04-07-2009 06:19 PM  9 years agoPost 50
hdskullfire2

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Bethlehem, Pa.

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Nice Vid.

Quick bird...

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-07-2009 08:16 PM  9 years agoPost 51
Chris Hinds

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Loughborough, Leicestershire, England

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Good job Steve, looks like a great effort and a nice set of photos/build information too. Are you flying 3D or FAI with the model? I ask because 1650 seems quite high for FAI hovering, but obviously for 3D work would be bang on as the blades won't be so suited to hover stability...

Cheers

Chris

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04-07-2009 10:07 PM  9 years agoPost 52
hdskullfire2

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Bethlehem, Pa.

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Hi Chris,

I built it to be F3C spec, however I don't have the RotorTech 720mm Scott Gray's as of yet so I don't know what headspeed will work out with them. Everything I've read puts the headspeed in the 1500's somewhere, but the engine is still being broken in so I don't know what combination will work in the end. The RotorTech's I have now are the 710 3D's for the time being.

I was told by Century that the SG's are due to be available in the next week or two.

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-08-2009 08:52 AM  9 years agoPost 53
Bond007

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Leicestershire UK

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helipulse
I noticed from your pictures that the phasing ring is hard against the bottom of the head block

As you know, with the trailing link setup you are using, the swash goes down with positive pitch. Check for positive engagement of the the phasing ring pins on the max pitch you are using.

Max pitch I have is +12 in hold, and I have a good 4 to 5mm of the pins engaged at max pitch.

The way I set it is to leave the phasing ring loose and let it slide up to max negative pitch, in my case -9. Then I line up the phasing ring to be dead central with the fore/aft cyclic ball on the swash with flybar at 90 degrees to the boom. I then nip up the phasing ring and check the pin engagement at max pitch, and ensure the servos don't 'moan' at max negative pitch, before using loctite and tightening fully.

Don't mean to teach you to suck eggs buddy, but there is nothing in the manual about this

I've emailed Blitz and advised them that there needs to be a better explanation of how to set this up and check it before flying.

If you swap your head settings to the 3D setup (leading link) then the phasing ring needs checking and setting up again.

I've seen an Avro at a Comp last year and it went out of control. The pilot didn't know what was going on and we found the swash had dropped off the pins and rotated, which altered the control inputs. Fortunatley a very good 3D pilot took control and managed to get it down safely and without damage. Cool bit of flying that was and the best recovery I have ever seen

Blitz Avro, Align Trex600, Blade MCX

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04-08-2009 08:59 AM  9 years agoPost 54
Bond007

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Leicestershire UK

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hdskullfire2
Looks good

Are you running it in while using a limiter/governor

Thought that a limiter or governor can mask proper tuning of an engine, and it's best done first before plugging a limiter/governor in

I always run my models in, without any throttle gizmos, and at the same time setup the throttle curves to as good as I can get. Once it's run in well and the throttle curves are good, then I plug a governor/limiter in

I've lost magnets in the past, but hardly noticed it isn't on the governor any more. Usually shows up in the hovering section.

BTW I'm running 1550 in normal and 1950 in idle up

Was using RT720's, not SG's, but have now gone to RT700's AKMOD F3C's and they are really nice

Blitz Avro, Align Trex600, Blade MCX

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04-08-2009 02:14 PM  9 years agoPost 55
helipulse

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Toronto, ON, CANADA

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Bond 007

Thanks a lot for your input about phasing ring. I just love when people are trying to give their expert opinion. You are correct about the phasing ring. The phasing ring was adjusted properly after the pictures were taken as one of the other runryder member noticed the same as well.

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04-08-2009 02:24 PM  9 years agoPost 56
Bond007

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Leicestershire UK

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I'm no expert

Always learning from my own, and others mistakes, that's all

Blitz Avro, Align Trex600, Blade MCX

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04-08-2009 04:35 PM  9 years agoPost 57
hdskullfire2

rrApprentice

Bethlehem, Pa.

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Bond 007,

Getting back to you,

I don't have a governer, I've installed a Spektrum AR-7100R. It has a limiter that uses a sensor installed 1mm away from the YS91SR crankcase base plate. No magnets or any of that stuff. All electronic. All I need to do is raise the gain on the TX, tach the head to get it at the desired head-speed and off I go.

I agree that a limiter or governor could mask proper tuning of the engine, however I only have two ways of doing this effectively, one is to raise the headspeed via throttle curves and work each needle to get to the right mixture value, or two use the limiter, set the headspeed for each needle value and set the mixture that way. Either method, should result in the same once the engine is fully broken in.

I did this exact method with my T-Rex600NSP with a TT53 and it resulted in a very stong running engine. Right now I'm chasing the ideal mixture setting, and until I get a stable headspeed to find out what each needle does, I wouldn't know how it affects the other neddle settings.

My plan is to stay somewhere in the 1500's once everything is broken in, assuming it's possible to attain that headspeed range.

The only big variable is that I have not yet received the Scott Gray F3C 720's. I'm using stiffer 3D 710mm from RT, so I don't know how that will play into this once they are on the bird.

TBD

Steve

Your next stop, the Twilight Zone. Now get'a move on....Hey, get me a cold one first..!!

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04-08-2009 04:50 PM  9 years agoPost 58
Bond007

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Leicestershire UK

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Cool

A few pilots this side of the pond are using SG720's on their Avros and they seem to suit it well. If you do like them, then I suggest you try the RT700 F3C AKMOD specials, as they are definatley better when the wind picks up

Blitz Avro, Align Trex600, Blade MCX

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04-08-2009 05:18 PM  9 years agoPost 59
lok

rrNovice

Bangkok, Thailand

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bond 007
where did you get this blade i couldn't find any from the web store?

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04-08-2009 10:10 PM  9 years agoPost 60
Bond007

rrVeteran

Leicestershire UK

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http://www.world-of-heli.de/en/roto...bon-blades.html

Blitz Avro, Align Trex600, Blade MCX

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