RE: Introducing the new 90-1.20 Yak QB

RE: Introducing the new 90-1.20 Yak QB
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RE: Introducing the new 90-1.20 Yak QB - 2/26/2008 7:00:11 PM

beto9

Posts: 111
Joined: 8/22/2002
From: Montreal - Quebec, QC, CANADA
Status: offline

Tom... what size Seagull Edge you have? I just built the .90 size and waiting for spring to appear to try it!

I know I am guilty of "thread drift" but... I just wanted to know what to expect... Great quality of construction with a few "buts"...

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When my hands and knees stop shaking I take the planes out of my car....

(in reply to TomTreese)

Post #: 1076

RE: Introducing the new 90-1.20 Yak QB - 2/26/2008 7:16:15 PM

TomTreese

Posts: 434
Joined: 7/30/2005
From: Williamsburg, VA, USA
Status: offline

http://www.rcuniverse.com/forum/fb.asp?m=7139633
Here is the thread it's the 68" and I have a Saito 125 in it with 335 flights. Before the Yak it was my favorite.

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Insanity: Keep doing the same thing expecting a different result.

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Post #: 1077

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 1:11:36 AM

Jimeni

Posts: 478
Joined: 9/26/2006
From: West Carrollton, OH, USA
Status: offline

ARGH!!!!!! Seems UPS will never show!!!!!

Have not seen one in person yet. Cannot wait till it gets here.

(in reply to TomTreese)

Post #: 1078

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 2:43:25 AM

jamesrxx951

Posts: 121
Joined: 6/26/2007
From: toledo, OH, USA
Status: offline

i need some advise. i am using a saito 150 and im thinking of installing a perrypump. with the pump i can locate the tank further away form the motor and i was thinking of putting it close to the cg. anyone try this or any suggestions would be welcome.

(in reply to Jimeni)

Post #: 1079

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 12:57:15 PM

TomTreese

Posts: 434
Joined: 7/30/2005
From: Williamsburg, VA, USA
Status: offline

Why do you want to move the tank and install a pump? Balance?? I have a Saito 150 and a Dubro 16 oz tank mounted where recommended. It did take 1.5 oz of lead on the tail to balance it perfectly. Even if I moved the tank back I would have needed tail weight. A perry pump is just more expense and something else to malfunction. Just my opinion.

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Insanity: Keep doing the same thing expecting a different result.

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Post #: 1080

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 5:50:06 PM

jamesrxx951

Posts: 121
Joined: 6/26/2007
From: toledo, OH, USA
Status: offline

the only reason i was looking into a pump is i heard the motors run more consistant with a pump. and i have read other people moving the tank back close to cg and i dont know if that does anything. so i thought i would ask to get others opinions first.

(in reply to TomTreese)

Post #: 1081

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 6:17:25 PM

TomTreese

Posts: 434
Joined: 7/30/2005
From: Williamsburg, VA, USA
Status: offline

I have 10 glow planes, six with Saito engines mounted from upright to inverted. All have the fuel tanks against the firewall. Four are 3D aircraft that pull a lot of G's and I have never had a fuel flow problem.
The only guys here with fuel pumps are Gas planes.

_____________________________

Insanity: Keep doing the same thing expecting a different result.

(in reply to jamesrxx951)

Post #: 1082

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 6:24:51 PM

LangerLad

Posts: 15
Joined: 4/29/2004
From: MMNotts, UNITED KINGDOM
Status: offline

James save your time, effort and money. Go without the Perry to start with and only consider fitting one if you have problems with inconsistent engine running and then only after you have eliminated all other possible fuel supply issues.

Tom are you referring to the standard pumped carbs on gas engine? Or am I missing something?

< Message edited by LangerLad -- 2/27/2008 6:25:40 PM >

(in reply to jamesrxx951)

Post #: 1083

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 7:15:23 PM

TomTreese

Posts: 434
Joined: 7/30/2005
From: Williamsburg, VA, USA
Status: offline

quote:

ORIGINAL: LangerLad

James save your time, effort and money. Go without the Perry to start with and only consider fitting one if you have problems with inconsistent engine running and then only after you have eliminated all other possible fuel supply issues.

Tom are you referring to the standard pumped carbs on gas engine? Or am I missing something?

Yes.

_____________________________

Insanity: Keep doing the same thing expecting a different result.

(in reply to LangerLad)

Post #: 1084

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 8:40:43 PM

Jimeni

Posts: 478
Joined: 9/26/2006
From: West Carrollton, OH, USA
Status: offline

I had a Funtana X100. I moved the fuel tank back to the CG. The big bonus with it is that you have very little to no CG change with fuel load. It sounds like thats not an issue with this plane. If I find it to be nose heavy with a full tank, I will deffinately move the tank back. Made a huge difference on the X100. If you do it, move it back a little at a time, you may not need to go back far enough to require a pump. But as langerlad said, if inconsistent, trouble shoot. My 100, 125, and 180 run very consistent, with no issues.

(in reply to jamesrxx951)

Post #: 1085

RE: Introducing the new 90-1.20 Yak QB - 2/27/2008 11:10:06 PM

jamesrxx951

Posts: 121
Joined: 6/26/2007
From: toledo, OH, USA
Status: offline

i havent had any issues with inconsistancys, i am still putting this plane together and i have 2 other saito's that run fine,without pumps. i was just checking before it's all together. sounds like i shouldn't have any problems. thanx guys!

(in reply to Jimeni)

Post #: 1086

RE: Introducing the new 90-1.20 Yak QB - 2/29/2008 10:04:40 AM

MV99

Posts: 97
Joined: 12/26/2003
From: San Jose, CA, USA
Status: offline

quote:

ORIGINAL: TomTreese

Why do you want to move the tank and install a pump? Balance?? I have a Saito 150 and a Dubro 16 oz tank mounted where recommended. It did take 1.5 oz of lead on the tail to balance it perfectly. Even if I moved the tank back I would have needed tail weight. A perry pump is just more expense and something else to malfunction. Just my opinion.

** moving fuel tank closer to CG is not for balancing CG. It's real intention is to keep CG consistant thru out the flight. If you fly this great plane (I have one myself with YS 160DZ) mostly with 3D manuvers instead of pattern or IMAC type of flying, you won't tell much difference on CG shift during flight (after fuel gets consumed) when mounting @ location following manual. Moveing fuel tank will help a lot for pilots doing competition. I used to mostly fly pattern but now doing a lot more 3D flying. However, moving fuel tank become a habit of mine...:-)... including this Yak 54 and my other plane (Cap-X).

** If tuned properly, most Saito engines should run very well without pump!! However, adding insurance won't hurt either and will keep pilot's peace in mind when doing crazy 3D spinning manuvers at idle position for long a period time. I have 2 YS 160DZ (come with pump and fuel injection). One on Chip Hyde's Cap-X and the other is with this Yak 54. Both run around 1650-1680 RPM at idle and can stay stable thru out most 3D manuvers I can handle. I do believe the pump come with the engine indeed is a big factor for that.

Moving fuel tank and adding pump are both good options but not required. It for sure will add benefit to the plane but really depends on any given pilot's preference doing it or not.

Mitch

(in reply to TomTreese)

Post #: 1087

RE: Introducing the new 90-1.20 Yak QB - 2/29/2008 10:12:11 AM

MV99

Posts: 97
Joined: 12/26/2003
From: San Jose, CA, USA
Status: offline

quote:

ORIGINAL: MV99

Moving fuel tank and adding pump are both good options but not required.

Mitch

One correction ======> Pump is required if fuel tank is moved to CG position.

Mitch

(in reply to MV99)

Post #: 1088

RE: Introducing the new 90-1.20 Yak QB - 2/29/2008 2:54:18 PM

beto9

Posts: 111
Joined: 8/22/2002
From: Montreal - Quebec, QC, CANADA
Status: offline

If moving fuel tank back to the CG I wonder why we don't take a page out of the helicopter guys and add up front a small header tank... 4 oz, say....

_____________________________

When my hands and knees stop shaking I take the planes out of my car....

(in reply to MV99)

Post #: 1089

RE: Introducing the new 90-1.20 Yak QB - 2/29/2008 3:43:14 PM

mporlier

Posts: 5
Joined: 10/15/2006
From: Boucherville, QC, CANADA
Status: offline

quote:

ORIGINAL: beto9

Oh, beauty! Oh, beauty! Everything is OK!
I think that the only problem I see with the QB is... winter is long around here... will have to exercise a lot of restraint NOT to finish it fast....
Will post anything that looks like a confirmation or a difference in the posts found here...
And for our fellow Canadian friend in BC... hope you post the results of your electric flight!
Oh beauty! Oh beauty!

Maybe I should modify my signature... "When my hands and knees stopped shaking I took the plane out of the BOX"

Hey,