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Old Aug 17, 2012, 01:17 PM
James not bond
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do you mean the linkage between V?
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Old Aug 17, 2012, 01:18 PM
DiaLFonZo - UAV/Drone
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Originally Posted by jy0933 View Post
do you mean the linkage between V?
The actual "V" shaped part is what give the angle so it can be extend horizontaly
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Old Aug 17, 2012, 01:36 PM
James not bond
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in fact .. i wont worry about the tail.. cuz the \=/ shape structure should hold pretty good

the problem for larger payload is actually front arm. the largest bending moment will be at connection for arm and center plate. if the 2 horizontal enhance pieces can be extend to central of the hub.. might do better
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Old Aug 17, 2012, 01:51 PM
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The Flex has happen further up..

where the cut outs are at..

2.3mm thick material would fix that..

can you put dimensions of your motors..

or put a link to vendor ?

I worry.. you say .. Higher KV for larger props?

normally.. if you are going to go bigger props you lower the KV..
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Old Aug 17, 2012, 02:11 PM
James not bond
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theoretically .. lower kv for larger prop is true.. but only applies when you are aiming at not exceed max current/power at max throttle, which is not frequently pushed to...
bigger prop might decrease the "efficiency" but results in longer hovering time, which makes more sense on actual smooth flying....(acro is a whole other story)

mine is 2835- 750kv 4S.. 1045 is probably the cap that max throttle wont go above rating.. but i dont hit full throttle at all... (50% at hovering .. 100% will just like a rocket)...
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Old Aug 17, 2012, 02:13 PM
DiaLFonZo - UAV/Drone
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Quote:
Originally Posted by jy0933 View Post
theoretically .. lower kv for larger prop is true.. but only applies when you are aiming at not exceed max current/power at max throttle, which is not frequently pushed to...
bigger prop might decrease the "efficiency" but results in longer hovering time, which makes more sense on actual smooth flying....(acro is a whole other story)

mine is 2835- 750kv 4S.. 1045 is probably the cap that max throttle wont go above rating.. but i dont hit full throttle at all... (50% at hovering .. 100% will just like a rocket)...
Bledi already use smaller prop on the back
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Old Aug 17, 2012, 02:16 PM
James not bond
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Originally Posted by Dialfonzo View Post
Bledi already use smaller prop on the back
i might go this way too
any video i can take a look at the fly?
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Old Aug 17, 2012, 02:17 PM
DiaLFonZo - UAV/Drone
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First post have some..
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Old Aug 17, 2012, 02:53 PM
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2835- 750kv 4S.. 1045 ( seems perfect )

But your plan is to use 12 in hmm..

and push things more to there limit ?

hmm to me it sounds like the head speed would drop and you would not get as good as a performance as you could with smaller props..

but if you have tested this on your quad .. could be something to think about.


Quote:
Originally Posted by jy0933 View Post
theoretically .. lower kv for larger prop is true.. but only applies when you are aiming at not exceed max current/power at max throttle, which is not frequently pushed to...
bigger prop might decrease the "efficiency" but results in longer hovering time, which makes more sense on actual smooth flying....(acro is a whole other story)

mine is 2835- 750kv 4S.. 1045 is probably the cap that max throttle wont go above rating.. but i dont hit full throttle at all... (50% at hovering .. 100% will just like a rocket)...
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Old Aug 17, 2012, 03:04 PM
James not bond
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Quote:
Originally Posted by flyhigh300 View Post
2835- 750kv 4S.. 1045 ( seems perfect )

But your plan is to use 12 in hmm..

and push things more to there limit ?

hmm to me it sounds like the head speed would drop and you would not get as good as a performance as you could with smaller props..

but if you have tested this on your quad .. could be something to think about.

in theory.. best hovering time comes when the hovering power= rating power.. but then you wont take off... so leave about 20%~30% margin for take off and emergency maneuverability.. i have tired over-sized prop on my x250.. and they work pretty well.. for the large ones.. i'm still waiting for new motor... they shouldve come today.. but apprantly.. ICS delayed my packages
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Old Aug 17, 2012, 04:14 PM
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hmm

if you really must.. try this

we can lengthen the V part Horizontally..

the 2.3mm arms I have already..

Hmm I think you will also need taller gear.. :-)



Quote:
Originally Posted by jy0933 View Post
in theory.. best hovering time comes when the hovering power= rating power.. but then you wont take off... so leave about 20%~30% margin for take off and emergency maneuverability.. i have tired over-sized prop on my x250.. and they work pretty well.. for the large ones.. i'm still waiting for new motor... they shouldve come today.. but apprantly.. ICS delayed my packages
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Old Aug 17, 2012, 04:32 PM
DiaLFonZo - UAV/Drone
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Just did the modification.
I send the drawing to Luis cause i am going in vacation for the next 2 weeks..

- Tall gear
- Larger V plate for the tail
- Brace to accomodate the new V plate
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Old Aug 17, 2012, 04:37 PM
James not bond
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that actually look awesome
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Old Aug 17, 2012, 04:41 PM
DiaLFonZo - UAV/Drone
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that actually look awesome
Thanks...!
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Old Aug 17, 2012, 04:41 PM
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Here is the mini..

Second flight outdoors...

I had to turn down the rudder control..

on Vtail.. I had to bump it to .. 125% to get it to turn quickly..

on Y4 I had to lower it to 80% ..

Y4 Seem so much more powerful..

If I let it get up high.. then drop it down fast.. I have to use 100% power to not let it hit the grounds..

Guess it picks ups some momentum.. as it falls..

So far I like it..

hard to tell from the video ..but it does fly good.. bit more practice...
and its a keeper..

Mini-V Tail on Y4 Setup.. (3 min 6 sec)
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