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Old Jun 21, 2015, 03:32 PM
JupaCreations is offline
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The Netherlands, NH, Hilversum
Joined Sep 2014
108 Posts
Just returned from the may day
Weather cleared and the wind was predicted to reduce, so why wait?
Longest day of the year so good light too for flying.
Yakkie, after 7 broken props and one time rescueing it out of a tree I stopped.
Hence the mayday.
Heavily changed design of the nosepart after some nose dives.
Could tape some other issue to save it and keep flying upto prop 7.
But...................she flies, not as expected but she flies and I have to learn her and mine newbie habbits. Am I in love ? Not yet.
Forgot to switch on the DR on the ailerons at the first few launches (attemps).
So with 100% ailerons it was to much..............yes I know new bie error.
Not used to have rudder on the left stick (mode 2) so a steep learning curve to start with.
Left hand turns are easier and better then the right hand side turns.
Good I did not painted this first one...
The 7x3,5 GWS prop did not really pulled hard but a 8 x3,5 is on the way and some 3S 1100's to have some spare power.
The noise from the prop is a lightyear difference from the EZFLY and the Simple Delta. It is almost noiseless at half throttle.
Next real 6mm design is ready and will be printed and build one of these days.
I have a video from the tree crash and some first launches but the camera was not set up correctly so contrast was not good.
More to come for sure.

Paco
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Last edited by JupaCreations; Jun 22, 2015 at 11:09 AM.
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Old Jun 21, 2015, 05:06 PM
balsa or carbon is offline
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Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
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Quote:
Originally Posted by JupaCreations View Post
Just returned from the may day
Weather cleared and the wind was predicted to reduce, so why wait?
Longest day of the year so good light too for flying.
Yakkie, after 7 broken props and one time rescueing it out of a tree I stopped.
Hence the mayday.
Heavily changed design of the nosepart after some nose dives.
Could tape some other issue to save it and keep flying upto prop 7.
But...................she flies, not as expected but she flies and I have to learn her and mine newbie habbits. Am I in love ? Not yet.
Forgot to switch on the DR on the ailerons at the first few launches (attemps).
So with 100% ailerons it was to much..............yes I know new bie error.
Not used to have rudder on the left stick (mode 2) so a steep learning curve to start with.
Left hand turns are easier and better then the right hand side turns.
Good I did not painted this first one...
The 7x3,5 GWS prop did not really pulled hard but a 8 x3,5 is on the way and some 3S 1100's to have some spare power.
The noise from the prop is a lightyear difference from the EZFLY and the Simple Delta. It is almost noiseless at half throttle.
Next real 6mm design is ready and will be printed and build one of these days.
I have a video from the tree crash and some first launches but the camera was not set up correctly so contrast was not good.
More to come for sure.

Paco
DEFINITELY use low rates and expo at first flying the Yak 55 . And if you want , you can fly it " bank-and-yank " like the Simplest Simple Delta as long as you keep the speed up a little . Much more than your first two planes , it goes where you point it .
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Old Jun 21, 2015, 09:07 PM
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"Some do, some don't"
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United States, MI, Grand Rapids
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Quote:
Originally Posted by JupaCreations View Post
Just returned from the may day
Weather cleared and the wind was predicted to reduce, so why wait?
Longest day of the year so good light too for flying.
Yakkie, after 7 broken props and one time rescueing it out of a tree I stopped.
Hence the mayday.
Heavily changed design of the nosepart after some nose dives.
Could tape some other issue to save it and keep flying upto prop 7.
But...................she flies, not as expected but she flies and I have to learn her and mine newbie habbits. Am I in love ? Not yet.
Forgot to switch on the DR on the ailerons at the first few launches (attemps).
So with 100% ailerons it was to much..............yes I know new bie error.
Not used to have rudder on the left stick (mode 2) so a steep learning curve to start with.
Left hand turns are easier and better then the right hand side turns.
Good I did not painted this first one...
The 7x3,5 GWS prop did not really pulled hard but a 8 x3,5 is on the way and some 3S 1100's to have some spare power.
The noise from the prop is a lightyear difference from the EZFLY and the Simple Delta. It is almost noiseless at half throttle.
Next real 6mm design is ready and will be printed and build one of these days.
I have a video from the tree crash and some first launches but the camera was not set up correctly so contrast was not good.
More to come for sure.

Paco
3S 1100's ??? on a 36" Flat Foamie????? Me thinks you are killing this thing with weight, got anything half that size? More like a 450 to 500 and are you sure you want to start with 3S? Your earlier post said plane weight of 250 gr without batt.. A 400 2S batt should pull this thing through the air with no problem....

Just some thoughts...

Mark R.

old_coastie
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Old Jun 21, 2015, 11:43 PM
JupaCreations is offline
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The Netherlands, NH, Hilversum
Joined Sep 2014
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All,

I try to bank and yank and that works now with 50% ailerons.
I know it needs more speed although it is at same level as the SD for cruising.
I hope to make a better video.

Mark,

204 grams including 610 2S ready to fly. AUW or what you call it.
Not like to kill but like ot have some overshoot to rescue it.
I have to fly it outdoors and we mostly have no calm days concerning wind.

Paco
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Old Jun 22, 2015, 05:18 AM
old_coastie is offline
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"Some do, some don't"
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United States, MI, Grand Rapids
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Quote:
Originally Posted by JupaCreations View Post
All,

I try to bank and yank and that works now with 50% ailerons.
I know it needs more speed although it is at same level as the SD for cruising.
I hope to make a better video.

Mark,

204 grams including 610 2S ready to fly. AUW or what you call it.
Not like to kill but like ot have some overshoot to rescue it.
I have to fly it outdoors and we mostly have no calm days concerning wind.

Paco
Keeping it light, including the weight of the battery is the secret, extra capacity will NOT help you save the plane. If you hold onto the plane nose straight up and go to wide open throttle does it have enough power to be able to lift itself? If so then it has enough power to fly, Start off with just slow graceful level flight with wide turns just keeping wings level as much as possible. Starting of indoors is going to be a challenge but it can be done.

Good Luck....
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Old Jun 22, 2015, 07:32 AM
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450 - 610 batteries are best - try a 8040DD prop
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Old Jun 22, 2015, 07:34 AM
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Quote:
Originally Posted by WMParkFlyer View Post
450 - 610 batteries are best - try a 8040DD prop
yeah, for 3S and a 9x5 (9050DD) for 2S is what we recommend (he listed a 2S pack)
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Old Jun 22, 2015, 09:03 AM
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United States, FL, Davenport
Joined May 2012
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Echoing Mark (MARK Mark mark mark ) for sure!!

I would absolutely go smaller on the battery. Battery capacity doesn't affect your power to save the plane in a maneuver gone wrong as much as weight negatively affects it.

To put this in perspective a little bit, I fly my airfoiled Yak 55 with 450 mAh 3S batteries, it has LED system and all the requisite wiring, and it's flight weight is about 220g. I also have a Twisted Hobbys (EPP) 32" profile foamie that weighs about the same as your plane (~ 200g) which uses a 330mAh 2S.

A 9x4.7 slow fly prop is a good match for 2 cells as well. The 1700Kv motor is wound a bit high for what I like to put on this plane, I believe a 1500Kv would be better.

Keep at it!
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Old Jun 22, 2015, 11:15 AM
JupaCreations is offline
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The Netherlands, NH, Hilversum
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Thanks Thanks Thanks for the advice.

Paco
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Old Jul 03, 2015, 02:29 PM
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The Netherlands, NH, Hilversum
Joined Sep 2014
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Numero uno is battered so time for a new airframe.
From experience the battered ones survive the first ones.

Anyway numero dos has 104 grams of electronics including a 2S 610mA onboard.
The ready to fly weigth is 204 grams.
So I saved some grams as we now have a 9x4 prop instead of the lighter 7x3,5
It now has a 1500 kV HXT 2370 motor instead of the 1700 kV
It also has a longitudinal 5 x1 mm carbon spar in the frame.
All hinges are done with UHU por methode.
Rest of the plain is done by woodglue and foam safe cyano.

No painting yet... that we save for a white 6 mm depron version.

I now also know why the numero uno was eating props. The GWS 7x3,5 props fit snugly on the propsaver (lets say it fits thigth). The 9x4 prop uses and insert on the propsaver and can easily bow to each direction. Lesson learned.

Paco
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Old Jul 03, 2015, 05:05 PM
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I use to hear lots of guys mention liking the 1700kv about 5 yrs ago when I built mine. Page 1 gives a link for the 1500kv so I guess that's a good start. I've read about the old blue/silver BW having better numbers when compared to the new black/red BW but these motors are going to vary.

I just looked at the specs on the new 1500kv BW (red/black) and it says 2S~3S, 7x3.5 or smaller, 4.5~8A, 290 ~ 410g thrust.

The 1300kv says 2S~3S, 3.5~7.5A/20S, 7x3.5 ~ 9x4.7, 250~470g thrust.
The 1300 is rated for less amps but will turn a bigger prop and deliver more torque. It might be worth trying on your 200g (7oz) build.
The 9x4.7 is surely meant to be used with 2S which should keep you safe on amps and shows a couple oz. more torque but I haven't tested one but lower kv = more torque.

I use a rewound BW that's 1355kv. 20.8oz at 8.85A with a 8x4 on a 3S-460's.
I never need WOT even though mine is built more for outdoors and is 8.1oz.
I tried it on 2S once and didn't like it as much as it was slower and less responsive but I was still using the 8x4. I like the punch out I get with the 8x4 on 3S but I never gave it a fair chance. I need to try a 9x5 on 2S.
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Old Jul 16, 2015, 10:07 PM
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United States, AL, Huntsville
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Foam Board 32" Yak

My friend built this plane for my son, I've failed several times at building these planes so I wanted him to try. Came out great, was a bit nose heavy with 3 cell 1300 packs so switched to 3 cell 600 and a smaller ESC.

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Old Jul 16, 2015, 10:26 PM
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Originally Posted by jrtubb View Post
My friend built this plane for my son, I've failed several times at building these planes so I wanted him to try. Came out great, was a bit nose heavy with 3 cell 1300 packs so switched to 3 cell 600 and a smaller ESC.

Attachment 8065478
I'd use a max 3S 450. JMHO

Dave
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