E720 Flight #4

rotormonkey · 03-17-2012, 09:02 PM

Still needs a little tweaking, but I'm really enjoying this heli. Super smooth and super quiet and BIG blade farts. The sound in the vid doesn't do it justice. Sounds like a loud sewing machine.

YouTube

worldofmaya · 03-19-2012, 10:33 AM

Sounds really strange... you're sure there's nothing wrong? TT and main drive on mine is really quiet, you can't hear mine until I switch to 2000+ and one hears blade sound.
-Klaus

Bob O · 03-19-2012, 10:43 AM

Nice rm!!!

rotormonkey · 03-19-2012, 12:44 PM

Like I said, it just sounds like an angry sewing machine in the vid. It really does sound nice and smooth irl.

gwright · 03-20-2012, 01:01 PM

sounds like gear mesh may be tight and pinion is too high allowing setscrews to tic the bottom of the maingear.

AalFerrari · 03-20-2012, 07:08 PM

Awesome flight, you've got me wanting to get mine flying really bad. Sadly I have to wait to finish mine since the money that was going to go towards servos just got sunk into a blown radiator on my car

.

skaluf · 03-23-2012, 03:55 PM

Quote:

Originally Posted by gwright

sounds like gear mesh may be tight and pinion is too high allowing setscrews to tic the bottom of the maingear.

Trust me when I say Gary has ears acutely tuned to listening to gear mesh...he made me lube mine at OHB when I would not adjust the mesh in the field! It seems I was annoying him and mine was really not that bad.

Steve

rotormonkey · 03-24-2012, 08:06 AM

Well the set screw wasn't touching the gear, but I did go back and take a look at the mesh. I guess things must've moved a bit or something, 'cause it was tight. Readjusted, and it's a bit quieter now.

It still seems a lot louder in that vid than it did irl. The mic amplified it I guess.

gwright · 04-12-2012, 06:23 AM

My ears aren't that acutely tuned,.. you must not have had your hearing aid set properly and didn't realize it was that obnoxious <G>

(for Kaluf)

rotormonkey · 04-12-2012, 06:29 AM

My WHAT?! Jeez, I'm only 32!

Maybe it's time to invest in one

gwright · 04-12-2012, 07:55 AM

That was for Kaluf,.. sorry

skaluf · 04-18-2012, 12:00 PM

Ah heck, I know I can't hear...

OICU812 · 04-19-2012, 11:24 PM

Cool Joe, what you running for motor, pinion and blades there? Looks like you can run slow or fast on these and good behaviour!

rotormonkey · 04-20-2012, 06:39 AM

Hey Shawn, yeah it behaves nicely through pretty much everything other than screaming fast forward flight. (Then it gets just a bit pitchy).

I'm running the Scorpion 4035-450kv with a 13T pinion. Low headspeed is 1600rpm, high at 2000. The blades are RotorTech 710s.

NRPY · 04-20-2012, 05:57 PM

rotormonkey,
How are the vibes on this thing? Does the SK-720 complain?

rotormonkey · 04-21-2012, 08:06 AM

Sk720 is around 1-2 in the logs unless I really bang the sticks around. Then it spikes to 7-8 briefly. I haven't bothered tracking it down though as I'm not using self levelling.

The gear mesh was also tight last time I checked so it could be fine now.

doug100856 · 05-30-2012, 03:00 PM

Nice flight !

Quote:

sounds like gear mesh may be tight and pinion is too high allowing setscrews to tic the bottom of the maingear

EXACTLY why mine was a little noisey on the first flight, what Gary said. I swear there's about 1/6538th of a mm spacing between that tail pushrod guide and the gear too, but it clears it. Barely.
It's really some silky smooth flyer isn't it ?
It makes some ,'Brand X '

types at tthe field sound almost....cheap

.
That makes me feel good because my flying skills look "cheap" Doug

03-19-2012, 10:33 AM	#2
worldofmaya Registered Users My HF Map location Join Date: Jun 2007 Location: Graz, Austria	Sounds really strange... you're sure there's nothing wrong? TT and main drive on mine is really quiet, you can't hear mine until I switch to 2000+ and one hears blade sound. -Klaus __________________ SuziLAOS-DNHP-CenturioMax-Protos500-DJI-F550

03-19-2012, 10:43 AM	#3
Bob O HF Support My HF Map location Join Date: Dec 2008 Location: Negaunee, Michigan	Nice rm!!! __________________ Warp 360 Spartan Vortex VX1

03-20-2012, 07:08 PM	#6
AalFerrari Registered Users Join Date: Jun 2010 Location: Chandler, AZ	Awesome flight, you've got me wanting to get mine flying really bad. Sadly I have to wait to finish mine since the money that was going to go towards servos just got sunk into a blown radiator on my car. __________________ Blade: CX, Brushless mCP x, mCP x V2 Thunder Tiger: Mini Titan e325 V1, e720 FBL, X50e (under construction) Spektrum: DX8

04-12-2012, 06:23 AM	#9
gwright Registered Users Join Date: May 2006 Location: melbourne florida	My ears aren't that acutely tuned,.. you must not have had your hearing aid set properly and didn't realize it was that obnoxious <G> (for Kaluf) Last edited by gwright; 04-12-2012 at 10:11 AM..

04-19-2012, 11:24 PM	#13
OICU812 Registered Users My HF Map location Join Date: Oct 2005 Location: Edson, Alberta, Canada	Cool Joe, what you running for motor, pinion and blades there? Looks like you can run slow or fast on these and good behaviour! __________________ ...Once upon a time there were Nitros, flybars & frequency pins...Shawn To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

03-19-2012, 12:44 PM	#4
rotormonkey Registered Users Thread Starter My HF Map location Join Date: Aug 2008 Location: Ottawa, ON	Like I said, it just sounds like an angry sewing machine in the vid. It really does sound nice and smooth irl.

03-20-2012, 01:01 PM	#5
gwright Registered Users Join Date: May 2006 Location: melbourne florida	sounds like gear mesh may be tight and pinion is too high allowing setscrews to tic the bottom of the maingear.

03-24-2012, 08:06 AM	#8
rotormonkey Registered Users Thread Starter My HF Map location Join Date: Aug 2008 Location: Ottawa, ON	Well the set screw wasn't touching the gear, but I did go back and take a look at the mesh. I guess things must've moved a bit or something, 'cause it was tight. Readjusted, and it's a bit quieter now. It still seems a lot louder in that vid than it did irl. The mic amplified it I guess.

04-12-2012, 06:29 AM	#10
rotormonkey Registered Users Thread Starter My HF Map location Join Date: Aug 2008 Location: Ottawa, ON	My WHAT?! Jeez, I'm only 32! Maybe it's time to invest in one

04-12-2012, 07:55 AM	#11
gwright Registered Users Join Date: May 2006 Location: melbourne florida	That was for Kaluf,.. sorry

04-18-2012, 12:00 PM	#12
skaluf Registered Users Join Date: Mar 2007 Location: Champaign, IL	Ah heck, I know I can't hear...

04-20-2012, 06:39 AM	#14
rotormonkey Registered Users Thread Starter My HF Map location Join Date: Aug 2008 Location: Ottawa, ON	Hey Shawn, yeah it behaves nicely through pretty much everything other than screaming fast forward flight. (Then it gets just a bit pitchy). I'm running the Scorpion 4035-450kv with a 13T pinion. Low headspeed is 1600rpm, high at 2000. The blades are RotorTech 710s.

04-20-2012, 05:57 PM	#15
NRPY Registered Users Join Date: Aug 2009 Location: California, USA	rotormonkey, How are the vibes on this thing? Does the SK-720 complain?

04-21-2012, 08:06 AM	#16
rotormonkey Registered Users Thread Starter My HF Map location Join Date: Aug 2008 Location: Ottawa, ON	Sk720 is around 1-2 in the logs unless I really bang the sticks around. Then it spikes to 7-8 briefly. I haven't bothered tracking it down though as I'm not using self levelling. The gear mesh was also tight last time I checked so it could be fine now.

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