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Old Mar 06, 2012, 01:18 PM
Opt
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New Zealand, Auckland
Joined Oct 2010
383 Posts
This is an average photo of my average equipment layout

I think the video transmitter is too close to the batteries in the front as i get drop outs when the batteries are in the way when turning. I dont want to bother mounting the vtx on the wing if i can help it, any ideas?
Just bank left at distance? haha

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Last edited by Opt; Mar 06, 2012 at 01:23 PM.
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Old Mar 06, 2012, 01:56 PM
Project Tormentor is flying!
United States, WA, White Salmon
Joined Nov 2005
1,885 Posts
Opt, what antennas are you using? You shouldn't get drop outs when turning if you run CP antennas. (unless the batteries are RIGHT next to the antenna...)
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Old Mar 06, 2012, 01:56 PM
Foam Snow
South Africa, WC, Cape Town
Joined Aug 2011
1,289 Posts
Quote:
Originally Posted by argo-2 View Post
Anyone tried reverse-thrust? Works pretty well on my AXN CloudsFly e-glider. Only change required is to re-program the ESC (can only do with certain brands of ESC though).
That does not sound like a bad idea!? C'mon Ian, tell us why not ;P
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Old Mar 06, 2012, 01:59 PM
NDw
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Ireland, Limerick, Kilmallock
Joined Aug 2010
2,123 Posts
Car escs do have reverse
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Old Mar 06, 2012, 02:10 PM
Opt
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New Zealand, Auckland
Joined Oct 2010
383 Posts
Quote:
Originally Posted by philthyy View Post
Opt, what antennas are you using? You shouldn't get drop outs when turning if you run CP antennas. (unless the batteries are RIGHT next to the antenna...)
cloverleaf vTx, stock whip vRx
I only had one drop out at about 600m away when i was banking right to come back to me. I'm fairly sure at that point the batteries would have been right between the antennas
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Old Mar 06, 2012, 02:55 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
27,707 Posts
Stock whip on vRx is always sub-optimal.

ian
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Old Mar 06, 2012, 03:16 PM
Opt
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New Zealand, Auckland
Joined Oct 2010
383 Posts
I'm intending to build an SPW next, I didnt think this would really help with the batteries being in the way though. Does CP penetrate lipos?
The switch to the CL antenna was an improvement though, even if it is not very well made!
I'm using 2510mhz btw
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Old Mar 06, 2012, 03:24 PM
NDw
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Ireland, Limerick, Kilmallock
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Couldn't you use an extenson and mount just the antenna further out on the wing? Rather than the vtx too.
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Old Mar 06, 2012, 03:31 PM
Project Tormentor is flying!
United States, WA, White Salmon
Joined Nov 2005
1,885 Posts
CP will not penetrate batteries. It is just the polarization, not the frequency that changes. CP helps with dB loss when banking (essentially eliminates it). Once you go CP on BOTH the Vtx and the Vrx, you should notice a better signal when banking. But yeah, I would still mount the Vtx antenna up higher, or better yet, farther out on the wing, away from the batteries.
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Old Mar 06, 2012, 03:43 PM
Sorry-I am from Denmark !!
Niels Erik's Avatar
Danmark, Lolland, Søllested
Joined Nov 2010
68 Posts
What about using a normal propeller, and dont use brake on the esc?
Then the propeller will run free, and work as a brake, when the power to the motor are cut??


Ore just let the motor run slow ,acting as a brake, when comming in for a landing-And cut about ½ meter off the ground?

Can it work??
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Old Mar 06, 2012, 03:53 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
27,707 Posts
While a freewheeling prop might provide some useful braking, it's generally a bad idea to have
a spinning prop when you touch down. A stationary prop (even non-folding) will tend to just sort
of squirt out of the way when touches the ground, but a spinning prop has enough momentum
to drive a tip into the ground and then snap as the plane continues forward.
My ESC will freewheel with the throttle just above zero, and brake at zero, so maybe I'll see
if it'll help with the initial descent into the LZ and then turn brake on while in ground effect.

ian
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Old Mar 06, 2012, 04:49 PM
Sorry-I am from Denmark !!
Niels Erik's Avatar
Danmark, Lolland, Søllested
Joined Nov 2010
68 Posts
Quote:
Originally Posted by Daemon View Post
While a freewheeling prop might provide some useful braking, it's generally a bad idea to have
a spinning prop when you touch down. A stationary prop (even non-folding) will tend to just sort
of squirt out of the way when touches the ground, but a spinning prop has enough momentum
to drive a tip into the ground and then snap as the plane continues forward.
My ESC will freewheel with the throttle just above zero, and brake at zero, so maybe I'll see
if it'll help with the initial descent into the LZ and then turn brake on while in ground effect.

ian
Looking forward to read about your test of the "freewheeling brake"
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Old Mar 06, 2012, 05:18 PM
Look Sideways at Polarisation
Funky Diver's Avatar
United Kingdom, England, Darlington
Joined Jun 2011
93 Posts
Why not just add an pop up air brake, it doesn't have to be anything too radical, or even glider style airbrakes?

A sheet of balsa on a servo would be enough surely? There's plenty real estate for it to be added either top or bottom (obviously top would be more sensible for landing)
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Old Mar 06, 2012, 06:31 PM
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Illinois, USA
Joined Aug 2009
968 Posts
X8 just about ready for maiden. Waiting on weather.
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Description: X* with Nav Lights
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Old Mar 06, 2012, 06:38 PM
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Australia, SA, Adelaide
Joined Nov 2006
538 Posts
Nice visible colors vertcnc good job--good luck with the maiden don't forget the video
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