Twisted Hobbys - 32" Crack Yak - Build Thread (Lots of new pics!) - Page 215 - RC Groups
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Jul 13, 2012, 05:40 PM
Slopeaholic
jimbo320's Avatar
Quote:
Originally Posted by RCAddict16
Yeah, 8x4.3 instead of 9x4.5
i think i already have a 8x4.3 on 2s.
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Jul 13, 2012, 06:00 PM
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Then you are underpropped oops, 2S prop is a 9x4.7, not 4.5. 3S is 8x4.3, it says under the power combo on twisted's site.
Jul 13, 2012, 06:13 PM
Registered User
Aviefly's Avatar
Quote:
Originally Posted by jimbo320
Thanks Avie, Do i need a different prop to the tuff prop as well?
I think you have the X Series 1800kv motor on your slim Yak don't you Jimbo? I know a few people did run that on 3S but I wouldn't have thought it's the ideal motor for it, it's on an 8 inch prop on 2S already. I've been running some tests tonight but didn't try the 1800kv on 3S, I'll maybe run one up and give you the results when I get the chance again.
Jul 13, 2012, 07:04 PM
Registered User
Quote:
Originally Posted by Araya213
It works great, my buddy has the same radio, I haven't used mine yet. One thing I'm having trouble with is the throws. The Crack Yak manual says for sport flight (which I'm going to use to start out) to use 20 to 30 degrees of throw. I assume on the 7c that translates to endpoint adjustment, which can only be set in percentage. Am I correct in this? And if so, how do I go about converting the degrees into a percentage? And what is this a percentage of, 360 degrees or 180 or less? I'm sorry if the last couple of questions don't make any sense, I'm totally new to setting up this radio.

**EDIT** After using a formula I found online, I ended up with 41%, does that sound right or am I way off? This number comes as a result of assuming that I'm looking for a percentage of 180 degrees.

**DOUBLE EDIT** Nevermind, just RTFM and discovered that %100 percent equals roughly 40 degrees
Stop before you get anymore confused and mess things up!
Percentage does not have an equivalent angle.
Just set the control rods and horns up as in the manual. The key thing to get right is make sure the hole you are using on the control horn is directly above (perpendicular) the hinge point.
Then make sure your EPAs are at 100% and get a protractor or print off a picture of one. Then increase each EPA until just before the servo binds. Also it is a good idea to set them so the up/down and left/right limits on each surface are equal for predictable handling
Jul 13, 2012, 07:40 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
2nd flight at the high school... instead of just hovering around in the backyard. So 2nd "real" 3D flight with the Crack Yak! Torque rolls, hovering, knife edges, loops, and I even caught it at the end.

RCFS#38: Crack Yak - Crazy Flight at the High School (2 min 10 sec)




Dan
Jul 13, 2012, 08:19 PM
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Nice flight dude! What do your friends think of your flying? Mine would think I'm weird, but the plane is cool lol
Jul 13, 2012, 08:20 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by RCAddict16
Nice flight dude! What do your friends think of your flying? Mine would think I'm weird, but the plane is cool lol
Thanks! Not many friends around town... I only had 1 other boy in my class in school this year... so yeah LOL! I've now almost perfected my torque rolls so that I can do them for over 2 seconds and the other flight at the high school is uploading. In that flight I was hovering it sideways in the wind, making it roll and roll and roll without it actually moving forward much! Using the wind to my advantage! Haha!



Dan
Jul 13, 2012, 08:24 PM
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lol nice can't wait for the power kits to be in stock, I already ordered my CY, should be here Monday!
Jul 13, 2012, 08:29 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by RCAddict16
lol nice can't wait for the power kits to be in stock, I already ordered my CY, should be here Monday!
Awesome! Which power combo are you getting? The full one with the servos or just the motor/ESC?
Jul 13, 2012, 08:31 PM
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The full combo. Just so the build goes easier because I have never really built anything with this low of a completion level
Jul 13, 2012, 08:34 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by RCAddict16
The full combo. Just so the build goes easier because I have never really built anything with this low of a completion level
This low of a competition level? What do you mean?

Here's the 2nd flight at the high school with some "wind aerobatics"

RCFS#39: Crack Yak - 3D BATTLE With the Wind! (1 min 36 sec)




Dan
Jul 13, 2012, 08:35 PM
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COMPLETION lol. I haven't build anything other than a balsa ARF that took maybe an hour because it was highly prefabricated. This is not.
Jul 13, 2012, 08:47 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by RCAddict16
COMPLETION lol. I haven't build anything other than a balsa ARF that took maybe an hour because it was highly prefabricated. This is not.
Heck this comes like a puzzle, all the pieces fit together like a jig-saw foam puzzle. You'll have no problem building this thing. The servos/electronics are really the hardest part of it. But the frame is very simple. The spar goes in pretty easily too.

Oh and don't use a lot of Welder's glue inside... because it smells...



Dan
Jul 13, 2012, 08:55 PM
Suspended Account
Lol don't worry by basement workroom has an industrial quality fan from when my grandpa was a tanner. Don't ask. Its an old house my family has had for a long time and we have refurbished it
Jul 13, 2012, 08:56 PM
3D Hack
JC Spohr's Avatar
For you guys that are new to building these.... use Ron_Dog's "Coke" method to build it nice, straight, and easy.

Check the first several pages of this thread to see pictures.

You need at least a six pack of Coke (or whatever you drink), but I recommend a 12 pack for easiest build.

Thank me later.

JC


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