Twisted Hobbys - 32" Crack Yak - Build Thread (Lots of new pics!) - Page 219 - RC Groups
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Jul 14, 2012, 05:09 PM
Registered User
Aviefly's Avatar
Quote:
Originally Posted by jimbo320
Do you think the slim yaks motor is not up to 3s power and will burn out?
I don't think the X Series 1800kv motor is rated for 3S but I know some have done so successfully, IIRC Dan.50 is one that springs to mind. IMO not the ideal motor for 3S but fantastic on 2S for the Crack Yak but not quite enough grunt for the Pitts. I do have some X Series 1480kv motors that are also not rated for 3S however I have run the numbers and like what I see so am going to see if one of them stands up to the abuse.

Quote:
Originally Posted by jimbo320
This is what I have on the fat yak with an
8 gws prop( or did until I broke it ..., down to my last tuff prop ... It's holding up well ..)

http://robotbirds.com/catalog/produc...oducts_id=1974
The specs for that motor say it would be good for 3S but not what prop to use. I suspect that you could use a nine inch prop on 2S to give you more power from it and your eight inch on 3S. The only way to know for sure is to hook it up to a wattmeter.

PS glad I live in Scotland we've had some great flying weather
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Jul 14, 2012, 05:46 PM
Slopeaholic
jimbo320's Avatar
I know. You are far enough north of the jet stream, which is no incidentally over France...

Ok, I'll get a 3s pack for the fat yak and give it a go, I'm happy with 2s on the slim yak, as I found out today it DOESN'T like the wind ... Thanks.
Jul 14, 2012, 06:43 PM
House of Paine
weaser42's Avatar
Power system was out of stock when i did my cy. I went Motrofly 2205-1800 which has mad power on 2s. A buddy did extra slick with power combo shortly after flying my cy and while power was not bad he put a Motrofly on his slick the next week. Hacker A10-9l I've flown on similar sized epp and close to twisted combo but runs pretty hot, Motrofly runs very cool btw. For servos I'm loving futaba s-3114's.
Jul 14, 2012, 07:45 PM
DJO
DJO
"Yo, that's a thermal"
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Flying a little more aggressively in my backyard now.

RCFS#42: Aggressive Crack Yak Backyard 3D Flying (2 min 1 sec)




Dan
Jul 14, 2012, 08:04 PM
Suspended Account
Nice flying if that silly tree wasn't in the way you would have more room :P
Jul 14, 2012, 08:57 PM
DJO
DJO
"Yo, that's a thermal"
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Quote:
Originally Posted by RCAddict16
Nice flying if that silly tree wasn't in the way you would have more room :P
Thanks! And yeah that tree is annoying but I manage to avoid it LOL.



Dan
Jul 14, 2012, 09:00 PM
Suspended Account
Hmmmmmmmmmm........ do some rudder circles around it. Gotta take advantage of that 0 rudder coupling.
Jul 14, 2012, 09:26 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by RCAddict16
Hmmmmmmmmmm........ do some rudder circles around it. Gotta take advantage of that 0 rudder coupling.
Yeah I'll see. Eventually I'll make a video called "Crack Yak vs. The Tree" spoof off of Tareq Alsaadi's 3D heli video flying around a palm tree.



Dan
Jul 14, 2012, 09:58 PM
Suspended Account
Havnt seen that. Could you pm me a link?
Jul 14, 2012, 10:10 PM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Here you go:

Tareq Alsaadi vs. The Palm Tree (4 min 45 sec)




Dan
Jul 15, 2012, 01:12 AM
Registered User
Aviefly's Avatar
Quote:
Originally Posted by DJO
Flying a little more aggressively in my backyard now.

http://www.youtube.com/watch?v=TNbXlFkemF0



Dan
WOW that's some quick progression there Dan, nice one

Gota agree with RCA, forget the Tareq vid and get out there with that chainsaw LOL
Jul 15, 2012, 03:07 AM
Slopeaholic
jimbo320's Avatar
Quote:
Originally Posted by DJO
That guy can sure fly helis. I suppose it helps to have a stock of 100 at the palace if you bust one ...
Jul 15, 2012, 07:32 AM
Suspended Account
Anddddd back to the crack yak :P
Jul 15, 2012, 09:49 AM
DJO
DJO
"Yo, that's a thermal"
DJO's Avatar
Quote:
Originally Posted by Aviefly
WOW that's some quick progression there Dan, nice one

Gota agree with RCA, forget the Tareq vid and get out there with that chainsaw LOL
Thanks!

Yeah I don't know... my parents gave that tree a name - "Old Half-a-day" a long time ago So I guess they're really attached to the tree or something...

Quote:
Originally Posted by jimbo320
That guy can sure fly helis. I suppose it helps to have a stock of 100 at the palace if you bust one ...
Yeah LOL I've heard that he has a private mechanic for his helis.

I'm actually REALLY lucky because there used to be a HUGE tree almost right in the middle of the backyard, further down the hill. When it got cut down it left this ravine in our yard...



Dan
Jul 15, 2012, 10:34 AM
DJO
DJO
"Yo, that's a thermal"
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OK so I just got back inside from a Crack Yak flight...

So about halfway through the flight I made a stupid thumb movement and the nose when straight into the ground. So I picked it up and kept on flying because there seemed to be no damage when I checked. Well, it wasn't flying right. Something about it was "sloppy" or not like it used to be so I did a little more flying and confirmed that something was wrong. I landed it and that's when I noticed that there was about a 1 1/2 inch gash between the wing and middle part. LOL

Threw some Welder's on it and it'll be back up in flying in a little bit.

Gotta love EPP...



Dan


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