RE: 69" QQ Yak-54  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> RE: 69" QQ Yak-54
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RE: 69" QQ Yak-54 - 12/22/2007 12:24:32 AM   
Rezagh


 

Posts: 1734
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		Dave,

Thank you for the info. Would you please post some pictures of your engine install, ESC and battery placement for those who might be interested to do it your way. Also are these the 25c batteries you were testing?

Thanks a lot,
Reza

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       Post #: 226

RE: 69" QQ Yak-54 - 12/22/2007 12:25:51 AM   
Rezagh


 

Posts: 1734
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		I forgot to ask you to post a picture ogf where you removed the covering for battery cooling as well. Whenever you get a chance ofcourse

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       Post #: 227

RE: 69" QQ Yak-54 - 12/22/2007 3:32:18 AM   
David Leitch


 

Posts: 18
Joined: 10/14/2004
From: nsw, AUSTRALIA
Status: offline 		Rezagh

Assuming the mods let me do it the following link has various photos

http://www.rcgroups.com/forums/showthread.php?t=783489

The photos dont really show the motor/esc placement that well mainly because I ran out of time to take them when the install was happening. For the Hacker C50 there is a standard motor mount available from www.espritmodel.com amongst others that bolts to the firewall. Not much work really. The ESC is velcroed to the underneath of the fuselage motor box and the wires poke through.

So far I haven't cut any cooling slots in the cowl and the motor felt fairly cool after the first brief flights. It will need monitoring.

< Message edited by David Leitch -- 12/22/2007 3:38:52 AM >

(in reply to Rezagh)
       Post #: 228

RE: 69" QQ Yak-54 - 12/22/2007 10:20:52 PM   
Brenner


 

Posts: 78
Joined: 7/23/2007
From: Bridgman, MI, USA
Status: offline 		Congratulations on your success,

It looks like you're getting about 10% more power than predicted with the FlightPower 20C batteries. I assume it's because you're using 25C batteries instead, and the lower internal resistance is giving you higher voltage.

(in reply to David Leitch)
       Post #: 229

RE: 69" QQ Yak-54 - 12/31/2007 1:51:04 PM   
fish4100


 

Posts: 3
Joined: 3/5/2007
From: , NC, USA
Status: offline 		HELLO TO ALL
I JUST WANTED TO TELL EVERY ONE ABOUT MY 69 YAK I BUILT MY PLANE JUST LIKE REZAGH EXCEPT MUFLER WAS A PITTS STYLE THIS COMBO IS THE BEST COMBO I HAVE EVER PUT TOGHTER THIS PLANE IS BAD TO THE BONE IF YOU CNT DECIDE ON THE OS120 OR THE SAITO 125 I HAVE BOTH AND BOTH ARE GOOD BUT THE OS 120 REALLY GIVES ME UNLITIMED VIRTICAL THE POWER IN COMBO IS UNBELIVABLE IT WILL CLIMB OUT OF SIGHT AND THE MOTOR IS NOT BROKE IN YET SO FOR EANYONE THAT CANT DECIDE GO WITH REZAGHS COMBO GO BIG OR GO HOME!!!!!!!!!!!!!!!!!!!!!!!!!!!

(in reply to Brenner)
       Post #: 230

RE: 69" QQ Yak-54 - 1/2/2008 2:08:28 AM   
pinguecola


 

Posts: 84
Joined: 12/11/2005
From: roma, ITALY
Status: offline 		AAArghhhh !!!!!!!!!!!!!!!! i have saito125 and o.s.120 and i have got for saito !!!!!!!! my plane will be fliyng next week , i hope. i have broken my mind about this choice and now i have saito installed and i guess o.s. is better. and saito was fine for a scale i have to build too !!!!!!!!! sob.... sob......... i never get the right choice ! i must return to build old ships ( static ).
HAPPY NEW YEAR !!!!!!
FRANCESCO

(in reply to fish4100)
       Post #: 231

RE: 69" QQ Yak-54 - 1/2/2008 4:11:08 AM   
overbored77


 

Posts: 603
Joined: 4/30/2005
From: Galloway, NJ, USA
Status: offline 		I have got the airframe assembled on the 69". I ordered the OS 120 AX and bisson Muffler,
I also ordered 4 HItec 5625MG servos with a 6volt output of 131oz. and a 2000 mah 6volt
NIMH RX pack. Will the servos and battery be ok for this plane?

I had 6 5645mg servos around but they were used in offroad cars so i said new plane and
new engine I might as well buy some new servos also. and the 25's were a bit faster.

I also have to say great job on the instructions REZ. It was a joy to assemble, and the plane
is very well built. I also have one of the bent landing gears but I did some modifying to get the
camber correct and left the wheelpants off until I get a straighter gear.

Thanks
Chris

< Message edited by overbored77 -- 1/2/2008 4:17:23 AM >

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Chris Murphy
TEAM SKYBLAZERS.Focus II,QQ Yak, tigerII, Tiger60, Ice Point, Reactor, Futaba. OS ENGINES.

(in reply to pinguecola)
       Post #: 232

RE: 69" QQ Yak-54 - 1/14/2008 3:46:44 AM   
pinguecola


 

Posts: 84
Joined: 12/11/2005
From: roma, ITALY
Status: offline 		now i am ready to fly.
saito 125- JR 8411 all around- JR 10x- JR extra 2700 nimh- apc 17-6- everything fit ok but landing gear. very nice to assemble, and very well enginereed. i would like to thank quique, because i think he have got a great and accurate job on this arf !!! THANK YOU QUIQUE !!!!!!
i will post some photo.
ciao francesco

(in reply to overbored77)
       Post #: 233

RE: 69" QQ Yak-54 - 1/14/2008 4:01:48 AM   
pinguecola


 

Posts: 84
Joined: 12/11/2005
From: roma, ITALY
Status: offline 		some photo

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       Post #: 234

RE: 69" QQ Yak-54 - 1/14/2008 4:04:32 AM   
pinguecola


 

Posts: 84
Joined: 12/11/2005
From: roma, ITALY
Status: offline 		other....

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       Post #: 235

RE: 69" QQ Yak-54 - 1/15/2008 6:54:26 PM   
Edge5foamy


 

Posts: 5
Joined: 8/13/2007
From: Fort Valley, GA, USA
Status: offline 		What wing bags would work best with the plane?

(in reply to pinguecola)
       Post #: 236

RE: 69" QQ Yak-54 - 1/16/2008 9:28:52 PM   
asmatt2


 

Posts: 49
Joined: 6/16/2007
From: Lexington, KY, USA
Status: offline 		What is everyone using to seal the open box box behind the firewall?

(in reply to Edge5foamy)
       Post #: 237

RE: 69" QQ Yak-54 - 1/17/2008 3:32:05 AM   
guisyl


 

Posts: 3
Joined: 1/3/2006
From: Timmins, ON, CANADA
Status: offline 		A saito 180 come's in at around 34 oz w/muffler, would this engine be to heavy for this airframe ? I think the os 120 ax weights about 29.? , as anyone put in the saito 180 in this yak ?

(in reply to asmatt2)
       Post #: 238

RE: 69" QQ Yak-54 - 1/17/2008 3:41:46 PM   
onewasp


 

Posts: 1316
Joined: 12/11/2002
From: USA, USA
Status: offline
quote:

ORIGINAL: guisyl

A saito 180 come's in at around 34 oz w/muffler, would this engine be to heavy for this airframe ? I think the os 120 ax weights about 29.? , as anyone put in the saito 180 in this yak ?


You obviously have never flown a Saito 180powered plane.
The Saito 150 is way too much for this A/C; the 180 on an airframe this light is "aerobatic suicide"

The 180 is a full load for the 73".

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The ground reached up and smote my airplane

(in reply to guisyl)