RE: 69" QQ Yak-54

RE: 69" QQ Yak-54
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RE: 69" QQ Yak-54 - 11/10/2007 3:58:10 PM

Posts: 19
Joined: 8/5/2004
From: pelion, SC, USA
Status: offline

Reza you posted on 10/27/07 that you where going to check on the landing gear. I have had my plane for almost 4 months as well as many of us. Have you heard anything on the correct gear? 11/10/07

(in reply to w4sm)

RE: 69" QQ Yak-54 - 11/10/2007 7:38:46 PM

Rezagh

Posts: 1857
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline

marlin,

I have no dates as when they will be here. On such matters please call QQAC directly as I can't be much of help. I don't get or want to get involved in contacting the OEM directly. Last time I checked, Wayne was going to send an email to the OEM to check the status on these. Current landing gear situation is not causing anyone to ground their airplane but I understand look is very important to some people and you have the right as well, however out of many that were sold I seem to see only 2-3 people that are way more concern and seem to have a hard time dealing with the landing gear toe look!

Please be patient and if your problem is part related make sure to call the company. Anyway, if I can't help you on the forum with your problem or question, you need to call QQAC for those matters or issues.

This would be my last post on landing gear until QQAC notifies me of the status of landing. Once I have more info and they are here, you will hear from me. I too hope we get to the bottom of this.

Reza

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RE: 69" QQ Yak-54 - 11/11/2007 11:42:34 AM

Posts: 19
Joined: 8/5/2004
From: pelion, SC, USA
Status: offline

Thanks Rezagh, you really have been great with all the info on this plane and different options to go with.Since you are in comunications with the factory more than we are if you could let wayne know which of the few on here would need attention they could call us. But I will call them. I understand that this issue doesnt effect the way the plane flys (which is great) but 400.00 is at the higher end for a 120 size plane and to have the horn issue and the landing gear issue i am sure QQ would like to make it right. But like i said Thank You you have been a big help on all aspects of this plane, the customer ussally doesnt have a person to question and to get the best options for a plane like QQ does it. thanks Again Marlin

(in reply to Rezagh)

RE: 69" QQ Yak-54 - 11/11/2007 4:32:27 PM

Posts: 90
Joined: 7/23/2007
From: Bridgman, MI, USA
Status: offline

Well, I finally finished getting Yak put together. It's taken me a while because when we had the horn issue, I put the Yak aside and focussed on Pattern, but now it's finished. Anyhow, I just wanted to report that it came out at about 8 lbs without fuel, and the CG came out exactly as per spec. The only changes I made from stock were to replace the stock OS 120 AX muffler with a Bison Muffler, and to swap out the elevator pushrod for a longer one so that I could cant the horn back towards the front of the plane to linearize the elevator travel. The Bison muffler has two advantages. It's quite a bit lighter than the AX muffler, (thus the 8 lb weight) and it fits totaly inside the cowl, so all I needed to do was cut holes for the exhaust outlets.

(in reply to marlin847)

RE: New Somenized (TM) 69", Yak-54 - 11/14/2007 4:08:35 AM

Posts: 651
Joined: 4/30/2005
From: Galloway, NJ, USA
Status: online

Hey guys, Great thread lots of info. My wife was going to order me the 49" electric yak
for christmas but instead ordered the 69" So now I am stuck with it.

I currently have an OS 1.20-E series Four stroke new in box
and a Magnum 1.20 four stroke used. Should I bolt one of these
in it or bite the bullet for a Saito 1.25 or 120AX? I don't have the funds for
a YS.

I also have a small stockpile of Hitec 5645 MG servos will these be OK?

_____________________________

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

(in reply to dmajchrzak)

RE: 69" QQ Yak-54 - 11/15/2007 3:50:07 AM

CloudNineAviation

Posts: 32
Joined: 9/12/2007
From: England, UNITED KINGDOM
Status: offline

quote:

ORIGINAL: Brenner
..... The Bison muffler has two advantages. It's quite a bit lighter than the AX muffler, (thus the 8 lb weight) and it fits totaly inside the cowl, so all I needed to do was cut holes for the exhaust outlets.

Hi Guys,

Got the kit last Fri and finally managed the 1.20 AX a couple of days ago...for some reason no one in the U.K. had the O.S.

How much lighter is the Bis Muf..?

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(in reply to Brenner)

RE: 69" QQ Yak-54 - 11/19/2007 9:26:37 AM

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

Hi there.. If anyone is in a position to post the empty weight of the kit I'd be most grateful. The reason I ask is I have to go all the way from Sydney to the USA to pick up this kit, actually just visiting for business, and don't want to have something shipped to a hotel that turns out to be too heavy. I'm looking to do an electric version of this. Been casting around for the right size model for a month now for my Hacker C40 10XL on 8s and the only other thing is the Funtana X 100.

(in reply to CloudNineAviation)

RE: 69" QQ Yak-54 - 11/27/2007 1:24:14 PM

Posts: 3
Joined: 3/5/2007
From: , NC, USA
Status: offline

I ORDERD A 69 YAK I LIVE 2300 ABOVE SEA IS THE 120 AX GOING TO GIVE ME THE PULL OUT I NEED FOR HOVERING

(in reply to David Leitch)

RE: 69" QQ Yak-54 - 12/4/2007 2:48:03 PM

Posts: 86
Joined: 12/11/2005
From: roma, ITALY
Status: offline

hello brenner,
i am from italy and i am going to assemble my yak with o.s.120 ax with bisson muffler. did you find any decrease in thrust with this option versus the stock muffler?

i do noy like to destroy fiber glass motor hatch.
thank you francesco

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(in reply to Brenner)

RE: 69" QQ Yak-54 - 12/4/2007 3:28:35 PM

Posts: 49
Joined: 6/16/2007
From: Lexington, KY, USA
Status: offline

Reza,

What type of spinner is everyone putting on this plane? I was thinking of a carbon fiber but what shape and size should i get?

Thanks!

< Message edited by asmatt2 -- 12/4/2007 3:29:17 PM >

(in reply to pinguecola)

RE: 69" QQ Yak-54 - 12/4/2007 5:49:16 PM

Posts: 90
Joined: 7/23/2007
From: Bridgman, MI, USA
Status: offline

Sorry Francesco,

I never ran my 120 AX with the stock muffler. I installed the Bison right from the start. Seems plenty powerful though ..

(in reply to asmatt2)

RE: 69" QQ Yak-54 - 12/5/2007 1:19:21 PM

Posts: 3
Joined: 3/5/2007
From: , NC, USA
Status: offline

REZAGH . SORRY MY NAME IS JOHN I JUST GOT THE BEST PLANE I HAVE EVER HAD 69 YAK MY RAIDO IS JR6102 MY SERVOS ARE NEW 5645MG MY 1100JR PACK 5 CELL IS ALMOST NEW I WAS TRYING TO SAVE A LITTLE MONEY IF THIS PACK IS OK IF NOT WHAT WOULD BE OK WITH OUT SPENDING 112.00 ON A BATTERY
PS. I GOT THE OS 120 AX DID THIS MOTOR COME TO LIFE GOOD FO YOU??

(in reply to Brenner)

RE: 69" QQ Yak-54 - 12/7/2007 3:30:02 PM

Rezagh

Posts: 1857
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline

Hello John,

Capacity of the battery is not ideal but it will work for 2-3 flights on the safeside. Just keep an eye on it. I think a 2000 would be a much better selection. And no you won't have to spend a fortune. NIMH batteries are really cheap these days

Reza
P.S. Your email does not say what plane, you are putting these servos in it!

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RE: 69" QQ Yak-54 - 12/7/2007 3:30:54 PM

Rezagh

Posts: 1857
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline

3.25" P51 or Extra style. Don't use Ultimate style spinner, they don't look good on this plane.
Reza

quote:

ORIGINAL: asmatt2

Reza,

What type of spinner is everyone putting on this plane? I was thinking of a carbon fiber but what shape and size should i get?

Thanks!

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Quique's Aircraft Company

(in reply to asmatt2)

RE: 69" QQ Yak-54 - 12/9/2007 3:21:24 AM

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

A while back I asked for the empty weights but noone seemed to have the data. It always amazes me that manufacturers/distributors don't keep such data or are unwilling to publish it.

Anyhow I picked up one from Mikes Models in Oklahoma on a recent visit and carted it all the way back to Sydney, cost me $100 in oversize baggage. According to my scales the total of the bits in the box is around 80 oz, with around 16 oz tied up in the accessories. For the electric configuration I will go with (Hacker C50 10XL on 8S) that should give me an in the air weight of around 155 oz, about 10 oz more than I wanted. There should be plenty of power but a highish wing loading.

I will do a bit of a build thread on the other forum.

(in reply to Rezagh)

RE: 69" QQ Yak-54 - 12/9/2007 5:34:32 PM

Posts: 90
Joined: 7/23/2007
From: Bridgman, MI, USA
Status: offline

I just ran your specs through MotoCalc, and according to its results you should be very pleased wih this setup. This is what it says:

Motor: Hacker C50 10XL; 1624rpm/V; 1.26A no-load; 0.0118 Ohms.
Battery: FlightPower 2500 (20C); 8 series x 2 parallel cells; 2500mAh @ 3.7V; 0.0065 Ohms/cell.
Speed Control: Castle Creations Phoenix 80; 0.001 Ohms; High rate.
Drive System: Hacker Planetary 6.7:1 Gearbox; 20x10 (Pconst=1.16; Tconst=1) geared 6.7:1 (Eff=95%).
Airframe: Yak 54; 950sq.in; 157.4oz RTF; 23.9oz/sq.ft; Cd=0.056; Cl=0.47; Clopt=0.66; Clmax=1.24.
Stats: 213 W/lb in; 192 W/lb out; 23mph stall; 31mph opt @ 66% (56:45, 72°F); 37mph level @ 78% (41:21, 75°F); 3635ft/min @ 90°; -294ft/min @ -6.2°.

Power System Notes:

The full-throttle motor current at the best lift-to-drag ratio airspeed (64A) falls approximately between the motor's maximum efficiency current (54.6A) and its current at theoretical maximum output (1181.7A), thus making effective use of the motor.
The voltage (27.5V) exceeds 12V. Be sure the speed control is rated for at least the number of cells specified above.

Aerodynamic Notes:

The static pitch speed (61mph) is within the range of approximately 2.5 to 3 times the model's stall speed (23mph), which is considered ideal for good performance.
With a wing loading of 23.9oz/sq.ft, a model of this size will have trainer-like flying characteristics. It would make an ideal trainer, for use in calm to light wind conditions.
The static thrust (334.1oz) to weight (157.4oz) ratio is 2.12:1, which will result in extremely short take-off runs, no difficulty