RE: QQ 85" Yak

RE: QQ 85" Yak
View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: none

Search This Thread

Printable Version

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> RE: QQ 85" Yak

Page: << < prev 2 3 [4] 5 6 7 8 9 10 11 next > >>

Login

Message

<< Older Topic Newer Topic >>

RE: QQ 85" Yak - 9/9/2005 4:19 AM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

Still in the early stages of building mine. Too busy with work to spend much time on it the past couple of weeks.

Question - did you find that the elevator half anchor points for the 8-32 Dubro control arms were simply soft balsa? I did. The acorn shaped Dubro nut just sinks into the balsa when I try to snug it down. The rudder is also soft balsa, with no hard point installed. If you found this, did you peel back the covering and wick in some CA or???

_____________________________

Lee

Hide Signatures

(in reply to mxcop114)

Post #: 76

RE: QQ 85" Yak - 9/9/2005 4:29 PM

mxcop114

Posts: 318
Score: 100
Joined: 6/12/2004
Last Login: 3/5/2010
From: Tuckerton, NJ, USA
Status: offline

I didn't pull back the covering, just wicked thin CA into the hole from both sides, let it dry, then repeated that a couple of times. They still sunk into the wood just a little, but not enough to worry about.

_____________________________

Team JR / Horizon Hobby
Team Extreme / Extreme Flight RC

Hide Signatures

(in reply to RCAddiction)

Post #: 77

RE: QQ 85" Yak - 9/9/2005 5:34 PM

Ted5660

Posts: 49
Score: 100
Joined: 4/17/2004
Last Login: 9/23/2009
From: Hannon, ON, CANADA
Status: offline

Yes I recieved my Yak day before yesterday. Covering was perfect, I am really impressed with the quality and workmanship. I have been flying the smaller EF yak.

What make of pitts muffler are you getting for your DA 50. I will be putting a DA 50 in as well.

Regards

Ted

Hide Signatures

(in reply to mxcop114)

Post #: 78

RE: QQ 85" Yak - 9/9/2005 6:29 PM

blkbird68

Posts: 639
Score: 100
Joined: 4/4/2002
Last Login: 1/1/2010
From: Henderson, KY, USA
Status: offline

quote:

ORIGINAL: mxcop114

Anyone out there close to ready to fly this plane? I guess I was the first one to get one in the air, but I thought for sure someone else would have had one up by now.

Since I thought that I had missed the cut on the first shipment I started on two other projects. So unfortunately my YAK will have to wait until I get at least one of them off the table.

Hide Signatures

(in reply to mxcop114)

Post #: 79

RE: QQ 85" Yak - 9/9/2005 7:34 PM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

quote:

ORIGINAL: Ted5660

Yes I recieved my Yak day before yesterday. Covering was perfect, I am really impressed with the quality and workmanship. I have been flying the smaller EF yak.

What make of pitts muffler are you getting for your DA 50. I will be putting a DA 50 in as well.

Regards

Ted

Ted, I believe MXCop used the Slimline pitts. Because of the large cutout needed for this muffler with the DA, I decided to use the stock DA muffler instead. I made a cowl template to check the fit and I believe its expansion chamber will fit completely inside the cowl, but barely. Won't know until I get up to that part of my assembly. FYI, the J&A pitts has a smaller expansion chamber (1.5" dia x 5" long) than the Slimline (2" dia x 5" long) It might possibly fit better, but it will be noisier.

MXCop, I spoke with Wayne today. He told me that he bolted through the balsa on the prototype with had no failures with QQ flying it. I'm going to use the thin CA as he suggested, and see how much it reinforces the elevator. I've done this on many small planes but it makes me nervous on a 17lb plane. If I am not satisfied with the CA treatment, I will install ply plates.

_____________________________

Lee

Hide Signatures

(in reply to Ted5660)

Post #: 80

RE: QQ 85" Yak - 9/9/2005 10:07 PM

Bob J

Posts: 24
Score: 100
Joined: 3/23/2003
Last Login: 2/24/2010
From: Northridge, CA, USA
Status: offline

Lee,
Your pics and comments are great, and they are playing a significant role in my next aircraft selection. My TOC 30% (87") Yak 54 crashed yesterday after interference and subsequent PCM lockout. It did a 360 and continued flying away until crashing on an adjacent golf course. DA 50, servos and hardware appear Ok, but plane is not repairable. Now deciding between another TOC Yak and the QQ Yak. While I'm familiar with TOC Yak and control setups and mixes are programmed into my radio, I like the looks of the QQ better, and I suspect from your photos and comments it is also easier to assemble. On the other hand, the TOC is in stock while the QQ isn't arriving until sometime ( maybe) in October. I'll call Wayne for more info on that. In your photos, I noticed that with the 2.5" extensions and the mounting blocks the DA sticks out of the cowl by about 1". Are the blocks really needed in front or can appropriate reenforcement be installed on aft side?
Bob

Hide Signatures

(in reply to RCAddiction)

Post #: 81

RE: QQ 85" Yak - 9/9/2005 11:35 PM

Ted5660

Posts: 49
Score: 100
Joined: 4/17/2004
Last Login: 9/23/2009
From: Hannon, ON, CANADA
Status: offline

Lee

Thanks for the info re the muffler. Could you post what you finally end up doing? I would appreciate knowing.

Ted

Hide Signatures

(in reply to Bob J)

Post #: 82

RE: QQ 85" Yak - 9/10/2005 3:39 AM

Bob J

Posts: 24
Score: 100
Joined: 3/23/2003
Last Login: 2/24/2010
From: Northridge, CA, USA
Status: offline

Ted,
I originaly had the stock DA 50 muffler that I was going to use on my 30% TOC yak 54. This would have required a higher cut up the side of the cowl than I wanted so I went with the slimline pitts muffler instead. This does require a larger cutout on the cowl bottom, but in my opinion the result looked better from the more common viewing angles.
Bob

Hide Signatures

(in reply to Ted5660)

Post #: 83

RE: QQ 85" Yak - 9/10/2005 5:23 AM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

Uh oh. I just looked at my photo of the template so I could post it. When I did, I realized I'd forgotten something. The front 1.5"+ of the cowl is radiused so the bottom of the stock muffler would interfere with the front edge of the cowl. The stock muffler is 2" behind the prop. So, even if the prop is only 1" in front of the cowl, the muffler is going to hit the cowl by a good half inch.

I was counting on the engine being further back to help with clearance. I'd planned to avoid using the 3/4" wood standoffs that MXCop used for aesthetic reasons. I wouldn't have mind the small amount of lead I'd possibly have to add, since it flew fine with a 1 lb heavier 3W50 and the pitts weighs more anyhow. Bummer.....methinks I'm going to have to find a different muffler solution. Well, tomorrow will be a building day.

Attachments

Click to see fullsize image.

Click for fullsize

< Message edited by RCAddiction -- 9/10/2005 5:24 AM >

_____________________________

Lee

Hide Signatures

(in reply to Bob J)

Post #: 84

RE: QQ 85" Yak - 9/11/2005 2:33 PM

contempo

Posts: 285
Score: 100
Joined: 10/8/2002
Last Login: 3/12/2010
From: NC
Status: offline

My QQ 85" Yak arrived Thursday Night. Finally got a chance to look over everything this weekend. I am very impressed with the quality of the plane.

Now this next question is not meant to start a flame war, so keep that in mind when you reply.

QQ advertises the wing area of his 85" Yak at 1,320 square inches.

EF advertises the wing area of their Yak at 1,40? square inches.

Having seen both planes up close now (although not side by side) I don't think that there is that much of a difference in the two.

So, does the EF really have a hundred and something more square inches of wing than the QQ?

Matt

_____________________________

I'll fly anything once...

Matt

Hide Signatures

(in reply to RCAddiction)

Post #: 85

RE: QQ 85" Yak - 9/11/2005 3:33 PM

wgeffon

Posts: 6377
Score: 100
Joined: 12/2/2001
Last Login: 2/4/2010
From: Bloomington, IL, USA
Status: offline

quote:

ORIGINAL: contempo

So, does the EF really have a hundred and something more square inches of wing than the QQ?

Matt

Yes. But so what?? They both are great flying planes.

_____________________________

Wayne

Hide Signatures

(in reply to contempo)

Post #: 86

RE: QQ 85" Yak - 9/11/2005 4:50 PM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

Wayne, good point. Hopefully this will fly as nice as the EF, which flies incredibly well. I'm sure it will be slightly different since it's a bit longer/thinner than the EF, but the wing area probably doesn't mean squat.

You will be able to tell firsthand how well mine flies when I finish it and then you and Brian can give it a workout!

< Message edited by RCAddiction -- 9/11/2005 4:52 PM >

_____________________________

Lee

Hide Signatures

(in reply to wgeffon)

Post #: 87

RE: QQ 85" Yak - 9/11/2005 5:05 PM

sgolec

Posts: 21
Score: 100
Joined: 3/1/2004
Last Login: 4/7/2009
From: Washington, PA, USA
Status: offline

Well guys,
I flew my 85'' for the first time yesterday.
2 flights. ZDZ 80 is a monster in this plane.
It can be managed with a nice throttle curve.
It fits well in the cowl. Just a little head sticking
out the bottom ( grat for cooling ). 24/10 Bolly,
it will fly a click or 2 off of idle.
This plane came in, balanced, 17 lbs. even.
It does great spins. Upright harrier is a bit rocky,
but I am spoiled from the big planes. I
am heading back to the field today to do a much
more complete set up. This may fix some wing rock.

Hide Signatures

(in reply to mxcop114)

Post #: 88

RE: QQ 85" Yak - 9/11/2005 5:06 PM

sgolec

Posts: 21
Score: 100
Joined: 3/1/2004
Last Login: 4/7/2009
From: Washington, PA, USA
Status: offline

Here is the E I left off of grat

Hide Signatures

(in reply to sgolec)

Post #: 89

RE: QQ 85" Yak - 9/11/2005 10:42 PM

mxcop114

Posts: 318
Score: 100
Joined: 6/12/2004
Last Login: 3/5/2010
From: Tuckerton, NJ, USA
Status: offline

Bob,
I have been off the computer for a couple of days so didn't get your post. I know the motor sticks out about an inch past the cowl, but that is better for performance anyway. If you look at a real scale yak you will see that the prop is out pretty far also. I spoke with Quique about it the other day and he also agreed that that is ok, and recomends using the standoffs. It will also help with balance on the lighter DA 50 compared to the heavier engines. Trust me, once you fly this plane you won't even be thinking about the moter and cowl. I had everyone stop flying 3 times today for my flights at the feild, and everyone had nothing but good to say about the performance of the plane.

Lee

_____________________________

Team JR / Horizon Hobby
Team Extreme / Extreme Flight RC

Hide Signatures

(in reply to Bob J)

Post #: 90

RE: QQ 85" Yak - 9/12/2005 1:56 AM

bpryor

Posts: 1692
Score: 105
Joined: 11/30/2001
Last Login: 4/14/2009
From: Hillsboro, OR, USA
Status: offline

quote:

ORIGINAL: contempo

QQ advertises the wing area of his 85" Yak at 1,320 square inches.

EF advertises the wing area of their Yak at 1,40? square inches.

I have a KMP Yak, supposedly the same exterior dimensions as the EF, since they were the original EF planes, and it is listed as 87" and 1450 sq in. Reality is that it is 85" and 1366 sq in. I don't have a EF to measure, but my guess is that its identical to my KMP, which means it's really about identical to the QQ...

...but bottomline, as per Wayne, does it fly great? If so, who cares what the exact dimensions are.

_____________________________

Bill Pryor

Hide Signatures

(in reply to contempo)

Post #: 91

RE: QQ 85" Yak - 9/12/2005 2:28 AM

mxcop114

Posts: 318
Score: 100
Joined: 6/12/2004
Last Login: 3/5/2010
From: Tuckerton, NJ, USA
Status: offline

Once some more guys get this plane in the air the thought or questions about the wing area will be the last thing any one will talk about. The wing span is two inches less so calculate that compared to the E.F. and the difference won't be noticable. I wish I could get someone to video a flight for me so you guys can see the plane in action. Precision flight is so good, precise snaps, spins, and 3D flight is even better. The rolling harriers are so easy, blenders and knife edge spins are a blur, waterfalls require very little rudder imput and this knife edge flight is better than any plane I've flown. I havn't knife edge looped it yet, but I garantee it will do it with no problem. If you watch the flight of Andrew with the 102" on the web site, this plane performs easily as well as he flies the 102"er in the video. I still havn't done any mixing with my radio. The flight manual is up on the web site also for those of you who didn't know yet. I had a comment from someone about brown nosing Wayne and Quique by saying so many good things about this this product, but I just feel so strongly about this planes quality and performance along with the customer service. Any of you who have had bad experiances with other companys not standing behind the product know what I'm talking about.

_____________________________

Team JR / Horizon Hobby
Team Extreme / Extreme Flight RC

Hide Signatures

(in reply to bpryor)

Post #: 92

RE: QQ 85" Yak - 9/12/2005 3:08 AM

wgeffon

Posts: 6377
Score: 100
Joined: 12/2/2001
Last Login: 2/4/2010
From: Bloomington, IL, USA
Status: offline

On rounded cowled planes like the Yak's, its actually better to have the motor stick out past what we are used to seeing with other cowls
With the added space between the spinner backplate and the front of that big open hole, you will have more air getting into the cowl for cooling.

Kinda hard to baffle one of these things.

SGOLEC:

ZDZ 80??

We at EF figured someone was going to do that with the 87" Yak but to this day we havent heard of anyone trying it.

IMO, way too much motor and weight for a plane of this size but if your having fun, knock yourself out!

_____________________________

Wayne

Hide Signatures

(in reply to mxcop114)

Post #: 93

RE: QQ 85" Yak - 9/12/2005 3:18 AM

HardDeck

Posts: 136
Score: 100
Joined: 8/7/2003
Last Login: 4/12/2008
From: webster, NY,
Status: offline

Hello all

My QQ85 arrive today, and must say best looking cover work in ARF that I have ever seen. I am concerned about two points raised elsewhere here: the lack of a hard point for the control horn attachment at rudder and elevator; and the light look of the the engine box. I saw the comments re CAing the control horn attachment points. Looking for further comments re these two points. Any problems with those flying the plane re these or other structural issues?

Thanks
RJM

Hide Signatures

(in reply to wgeffon)

Post #: 94

RE: QQ 85" Yak - 9/12/2005 3:34 AM

flyinrazrback

Posts: 3758
Score: 100
Joined: 7/14/2002
Last Login: 3/19/2010
From: Enid, OK, USA
Status: offline

I thought of getting one of these planes and trying the new 3W 56 twin just for the heck of it.

_____________________________

"You'll get your chance smart guy!"

Hide Signatures

(in reply to HardDeck)

Post #: 95

RE: QQ 85" Yak - 9/12/2005 3:46 AM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

RJM,

I CA'd the holes for the elevator and rudder. Lots and lots of thin CA. I also pin-****ed the surface outside each mounting hole thru the covering and approx 1/8" deep into the wood and soaked CA into the surface. I did this in a 1/2" diameter circle around the top and bottom of each hole. After doing both of these things, I found that the Dubro control horn nuts did not sink into the wood at all, and completely hide the area that I hardened. It was much more solid feeling than just bolting through the balsa. I'd have felt better with hard points, but it actually turned out better than I expected.

_____________________________

Lee

Hide Signatures

(in reply to flyinrazrback)

Post #: 96

RE: QQ 85" Yak - 9/12/2005 4:04 AM

splais

Posts: 2954
Score: 130
Joined: 12/12/2001
Last Login: 3/18/2010
From: Yuma, AZ, USA
Status: offline

Are the control horn holes predrilled on the 85?

Hide Signatures

(in reply to RCAddiction)

Post #: 97

RE: QQ 85" Yak - 9/12/2005 4:10 AM

RCAddiction

Posts: 1005
Score: 100
Joined: 3/29/2002
Last Login: 3/5/2010
From: Waxhaw, NC, USA
Status: offline

Yes. The holes are predrilled

_____________________________

Lee

Hide Signatures

(in reply to splais)

Post #: 98

RE: QQ 85" Yak - 9/12/2005 4:21 AM

Bob J

Posts: 24
Score: 100
Joined: 3/23/2003
Last Login: 2/24/2010
From: Northridge, CA, USA
Status: offline

Lee,
Again thanks for your inputs. I'm just about convinced to order the QQ 85 even though the TOC 87!QUOT! was also a great flying airplane, but it weighed 19lbs because I beefed up the firewall and additional forward ballast was required for CG. If QQ does come in in the 16 to 17 lb range, it will have a lower wing loading than the TOC which has an advertised a wing area of 1411 sq in..
There's been some discussion about wing areas of various Yaks, so for those people let me say that what really counts is the wing loading = weight/area.
Lee, one other question for you. My engineering background makes me a little paranoid about structural integrity, and the pictures I've seen of the firewall area concern me, particularly the glue joint of the engine box to the bulkhead. Have you done anything to beef it up and if not have you noticed any problems there after your early flights?
Bob

Hide Signatures

(in reply to mxcop114)

Post #: 99

RE: QQ 85" Yak - 9/12/2005 11:53 PM

mxcop114

Posts: 318
Score: 100
Joined: 6/12/2004
Last Login: 3/5/2010
From: Tuckerton, NJ, USA
Status: offline

I have not done anythin but add a little 5 minute epoxy around the edges of the fire wall that the engine mounts to. I was told that it does not need anything extra though, and I have two gallons through my da 50 now with no signs of any problems. I have stressed the plane pretty hard now and had no problems with the elevator or rudder horn area either. I just added a little ca lue in the holes prior to installing the horns.

Lee

_____________________________

Team JR / Horizon Hobby
Team Extreme / Extreme Flight RC

Hide Signatures

(in reply to Bob J)

Post #: 100

Page: << < prev 2 3 [4] 5 6 7 8 9 10 11 next > >>

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> RE: QQ 85" Yak
Page: << < prev 2 3 [4] 5 6 7 8 9 10 11 next > >>

Jump to:

Google

Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP! : : FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

1.875RCU1