RE: Help? Phoenix Models 63" Yak-54

RE: Help? Phoenix Models 63" Yak-54
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All Forums >> RC Airplanes >> 3D Flying! >> RE: Help? Phoenix Models 63" Yak-54

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RE: Help? Phoenix Models 63" Yak-54 - 5/13/2008 11:50:03 AM

Posts: 11
Joined: 10/16/2007
From: Canberra, AUSTRALIA
Status: offline

Spacey another question for you. I finished building the Yak today and was setting up throws as per manual and I have a question on the elevator travel. It says for low rates 12mm but for high rates 16mm???? With the aileron and rudder the difference between low and high rates is quite large, but it seems for elevator this amount is very small?

Maybe my manual is misprinted. Can you remember what throws you had set for hi and lo rates on elev??

Thanks in advance

Scotty

(in reply to Spacey)

RE: Help? Phoenix Models 63" Yak-54 - 5/13/2008 12:19:10 PM

Spacey

Posts: 1881
Joined: 1/27/2004
From: Pretoria, SOUTH AFRICA
Status: offline

I can't recall low rates no but it was fairly low. Probably around the manual's high rates. My high rates on elevator was maxed out though, much as I could get for 3D. If you're not going to 3D then the manual's throws is probably ok. To get the tail going anywhere though through 3D stuff you need to get it in the 45'~50' area.

(in reply to Mr48Volts)

RE: Help? Phoenix Models 63" Yak-54 - 5/15/2008 11:34:59 AM

Posts: 11
Joined: 10/16/2007
From: Canberra, AUSTRALIA
Status: offline

Maidened the yak today in pretty breezy conditions, it handled the conditions perfectly and landed like a dream. On high rates it's a weapon

, axial rolls and knife edge were great, didn't try hovering due to the wind... Only drama i had was on 2nd flight the carb line from tank split, the yak keep going but it started to surge so I landed it as quick as I could manage, took off the canopy to find the bottom of the plane covered in fuel....So it was a lucky escape... Got the yak home stripped the tank and batteries out, hit it with the Mrs hairdryer and will put it back together tomorrow..

But after 2 flights this thing on low rates lands great and seems like it certainly will be the goods...

Running Gear
13x6 MAS Prop
15% Nitro
Super Tigre G90 (my 1st Super Tigre, and what a joy to use)
OS * Plug
On Board Programmable Glow

Cheers

Scotty

< Message edited by Mr48Volts -- 5/15/2008 11:36:47 AM >

(in reply to Spacey)

RE: Help? Phoenix Models 63" Yak-54 - 6/2/2008 6:17:40 PM

Posts: 14
Joined: 7/31/2007
From: Champaign, IL, USA
Status: offline

What do you think about flying this thing on an OS .46 AX 2-stroke with an 11x8 prop? I've got it in a phoenix Spitfire right now and was ahving serious trouble getting the beast in the air. But at 7 lbs it is almost 1.5 lbs heavier than the Yak.
I figure it should be good - I'm not looking to do heavy aerobatics, but am gaining interest.
This is the plane I'm getting and it looks different from yours:
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXTRZ4&P=7

Edited for link and prop size

< Message edited by My_Design -- 6/2/2008 8:11:45 PM >

(in reply to Spacey)

RE: Help? Phoenix Models 63" Yak-54 - 6/2/2008 9:13:21 PM

Spacey

Posts: 1881
Joined: 1/27/2004
From: Pretoria, SOUTH AFRICA
Status: offline

Scotty: Very glad it went well apart from the little trouble! You're going to enjoy this model I'm sure, it's a great all rounder. Just remember to keep that canopy out of the sun at all costs!!! Hehe

My_Design: I don't think that's a good idea at all no. This model will struggle with that size motor very much. There's alot of drag on the airframe and it will bite (tip stall) a little if you slow it down too much without horses to keep it aloft. I'm sure it will fly with the .46 in a capable pilots hands in good conditions but I just wouldn't recommend it, you're not going to have any room to breathe or make mistakes in. Why don't you look into a nice .40 sized profile for that motor? You won't be dissapointed, pop over to the profile forums here on RCU and have a look.

(in reply to My_Design)

RE: Help? Phoenix Models 63" Yak-54 - 6/2/2008 9:32:25 PM

Posts: 14
Joined: 7/31/2007
From: Champaign, IL, USA
Status: offline

Thanks for the reply. I just noticed that mine seems much smaller than yours.
Here's the full specs from Tower:
REQUIRES: Engine: .40 - .46 cu in (6.5 - 7.5cc) 2-stroke
OR .52 cu in (8.5cc) 4-stroke
Muffler: Standard type included with engine
Radio: Four channel
Servos: Five, 42 oz/in torque minimum
(2-ailerons, 1-elevator, 1-rudder, 1-throttle)
Servo Extension: One 6" (152mm) for ailerons
Y-Harness: One for aileron servos
Misc. Items: Foam rubber padding, medium fuel tubing, fuel filter,
propeller, building and field equipment

SPECS: Wingspan: 56.1" (1425mm)
Flying Weight: 5.5 - 5.9lbs (2500 - 2700g)
Length: 51.97" (1320mm)
Airfoil: Fully-symmetrical, mid wing mount
Center of Gravity: 4.1" (105mm) Back from the wing's leading edge
at the fuselage sides.
Control Throws- Low Rate High Rate
Ailerons: Up & Down 0.31" (8mm) 0.47" (12mm)
Elevator: Up & Down 0.31" (8mm) 0.47" (12mm)
Rudder: Right & Left 1.1" (28mm) 1.6" (40mm)

Does it still seem like I would need a bigger engine?

(in reply to Spacey)

RE: Help? Phoenix Models 63" Yak-54 - 6/3/2008 8:06:53 PM

Posts: 11
Joined: 10/16/2007
From: Canberra, AUSTRALIA
Status: offline

My Design it sounds like you've got the 40 size....so the engine you have will be fine.

(in reply to My_Design)

RE: Help? Phoenix Models 63" Yak-54 - 7/4/2008 3:59:34 AM

Posts: 128
Joined: 9/6/2005
From: santa ana, CA, USA
Status: offline

My_Design,
If you're into Yaks, take a look at the Hyperion 40e. It's originally an electric plane but the OS .46AX flies it very nicely. Keep it light and you can do any IMAC stuff you throw at it and even 3D. I just love this little bird and it looks very accurate, if you are into scale looks. I did the conversion by reinforcing and fuel proofing the timber in the nose. I went with standard servos and the plane barely breaks the 2kg mark.

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< Message edited by doublesixes -- 7/4/2008 4:56:07 PM >

(in reply to My_Design)

RE: Help? Phoenix Models 63" Yak-54 - 11/20/2008 8:45:13 AM

Posts: 237
Joined: 1/7/2008
From: melbournevictora, AUSTRALIA
Status: offline

Hi guys I've just gotten back into assambling my yak and will be building it as an electric to fly on the way home from work. At this point I am thinking either an E-flite power 90 or a 110 on 8 cells lipo. So the motors will easily throw a 16x10.

**I have also done away with the servos down the tail in favour of carbon pushrods with the servos mounted in the rudder tray.

**Did anyone else have an unsightly gap around the tail plane??

** lastly what have been everyone elses flying weights??

cheers Rossco

(in reply to doublesixes)

RE: Help? Phoenix Models 63" Yak-54 - 12/25/2008 1:15:11 PM

najee

Posts: 5
Joined: 11/20/2008
From: Pasir Ris New Town, SINGAPORE
Status: offline

Hi Guys,

Recently got myself the Phoneix Yak 54...My setup as follows

Enging: OS F110A Alpha
Prop : Master Airscrew Clasiic 14x8 (Fun Flying) or APC15x8 pattern
Radio : Futaba 2.4 6 channel radio
Servos : Hitec HS645MG
Batt : Sanyo Eneloop

The plane flies like a charm on low rates and a beast on high rates

Have to thank Spacey for his info on his build that helped me alot on mine...

(in reply to bignuts181)

RE: Help? Phoenix Models 63" Yak-54 - 12/25/2008 5:04:17 PM

Spacey

Posts: 1881
Joined: 1/27/2004
From: Pretoria, SOUTH AFRICA
Status: offline

No biggy.

(in reply to najee)

RE: Help? Phoenix Models 63" Yak-54 - 12/30/2008 8:08:24 AM

boltor

Posts: 5
Joined: 12/10/2005
From: , AUSTRALIA
Status: offline

Just putting together my Yak 54 (63" version) now - one question, the elevator servos are set at different heights in the fuselage - why is that?

(in reply to Spacey)

RE: Help? Phoenix Models 63" Yak-54 - 12/31/2008 12:16:07 AM

najee

Posts: 5
Joined: 11/20/2008
From: Pasir Ris New Town, SINGAPORE
Status: offline

Hey Dude,

Congrats on a great plane.. I think its because of the way the servo works. With the diff levels, the push rods will be at the same level on both sides.

BTW guys a note to look into that i discoveed on my YAK. Check the control horns from time to time, mine was a newer version that have abolt running tru the control surfaces and that losen up after a few flites. Balsa vs Metal = metal wins, It could flutter the plane, one of my mates had his fluttering and couldn't find the fault. I changed mine to a DUBRO one which is the same but a better quality so now the aielerons are working fine..(NOTE TO SELF - GET ONE FOR THE ELEVATORS)

The Under carriage is weak too!!

Have fun Boltor

(in reply to boltor)

RE: Help? Phoenix Models 63" Yak-54 - 12/31/2008 5:53:06 AM

boltor

Posts: 5
Joined: 12/10/2005
From: , AUSTRALIA
Status: offline

thanks Najee. What was your experience with getting CG right? I have an OS 91FX and it is tail heavy currently - interested to hear views (just put weight in the nose?) or other ideas. thanks!

(in reply to najee)

RE: Help? Phoenix Models 63" Yak-54 - 12/31/2008 6:09:50 AM

vx570

Posts: 87
Joined: 7/25/2004
From: TallwoodsNSW, AUSTRALIA
Status: offline

Hi bolter, as reported earlier in this thread: Tail heavy is a problem.
How much weight in the nose do you need to make it balance?
Greg

(in reply to boltor)

RE: Help? Phoenix Models 63" Yak-54 - 12/31/2008 1:27:42 PM

najee

Posts: 5
Joined: 11/20/2008
From: Pasir Ris New Town, SINGAPORE
Status: offline

Actually, the weak undercarriage help with the CG...
While strengthening the undercarriage and ended up with more weight up front and below...
But before that it was slightly tail heavy- just a tinch. I used a Vortex Aluminum Spinner to make it heavier an placed the battery right behind the tank. The PS F110Alpha was about 700gms. So had not much of a prob.

After Mods to Undies batts are now on the wing bar.

Just put my Yak on a scale and it weighs 3850gms without wings...

Now i am thinking of powering it with a 26CC Gasser. Or Get A CMPro Extra 300s 90 size and slam the 26cc gasser..
Nitro getting to be very Ex here. about US$18 per gallon

(in reply to boltor)

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