Introducing the new 90-1.20 Yak QB
05-26-2008, 11:53 AM
#1276
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RE: Introducing the new 90-1.20 Yak QB
Its not really a problem, but rather a trait. All my 3D planes do the same thing with that much throw, and it is airspeed related. The only one I've had that didnt snap, was the FuntanaX100. High rates on this plane, to me, should only be used in below stall speed 3D manuveres. I've been doing rolling harriers, slow rolls, ect. with low rates. But flat spins, waterfalls, elevators, ect. its high rates all the way. I get very little to no snap at all on low rates at any speed with my Yak. The Aeroworks 60 size edge snaps even worse, but that instability makes an awesome 3D plane. Just my 2 cents, hope it helps.
05-26-2008, 12:27 PM
#1277
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RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: TomTreese
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[
] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??
I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[
] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
For your prop, take a look at Vess Sport props. I had an APC 18x6W before and it was just too heavy and put too much of a load on the engine. Now I have a Vess 18x6 on mine and the combination of the lightness of the wood prop and the shape of the Vess propellers makes this thing really wring the plane around. Looottsss of powwweeerrrrr!!!
http://www.eastrc.org/shop.cgi/page=...211822823.1042
05-26-2008, 04:28 PM
#1279
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RE: Introducing the new 90-1.20 Yak QB
Interesting???
My Seagull Edge and Dave Patrick Ultimate don't do it. The Yak does it most of the time, except at low speed and low throws. There are four giant scale Yak's ( a Goldberg and 3 SD's)at our field and they don't do it??? Must be just be an Aeroworks thing?
Thanks..
My Seagull Edge and Dave Patrick Ultimate don't do it. The Yak does it most of the time, except at low speed and low throws. There are four giant scale Yak's ( a Goldberg and 3 SD's)at our field and they don't do it??? Must be just be an Aeroworks thing?
Thanks..
05-28-2008, 09:23 PM
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RE: Introducing the new 90-1.20 Yak QB
Went to a new flying field to check it out thinking I would impress guys with my big pretty Yak. PPFFTT! It was the smallest Aeroworks Yak there. There were 2 50cc, 1 100cc and 1 150cc. They said mine was cute 
The 150cc Yak is a sight to behold. I'm suffering from Yak envy. I do see me getting a 50cc within the next 2 yrs though. Its sharp as well.
The 150cc Yak is a sight to behold. I'm suffering from Yak envy. I do see me getting a 50cc within the next 2 yrs though. Its sharp as well.
05-28-2008, 09:49 PM
#1281
RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: Ferocious Frankie
This is a specific trait of the plane. All and I mean all Yaks do this. My .90-1.20 Yak does this, a friends 50cc Yak does this, another friends 35% Comp Arf Yak-55 does this,... It's just something that is incorporated into the Yak's design. Full scale Yak pilots use a lot of rudder in their maneuvers beacuse of this trait. I think it has something to do with the round fuselage design. You have to live with it and correct it in flight.
For your prop, take a look at Vess Sport props. I had an APC 18x6W before and it was just too heavy and put too much of a load on the engine. Now I have a Vess 18x6 on mine and the combination of the lightness of the wood prop and the shape of the Vess propellers makes this thing really wring the plane around. Looottsss of powwweeerrrrr!!!
http://www.eastrc.org/shop.cgi/page=...211822823.1042
ORIGINAL: TomTreese
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??
I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[
] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
For your prop, take a look at Vess Sport props. I had an APC 18x6W before and it was just too heavy and put too much of a load on the engine. Now I have a Vess 18x6 on mine and the combination of the lightness of the wood prop and the shape of the Vess propellers makes this thing really wring the plane around. Looottsss of powwweeerrrrr!!!
http://www.eastrc.org/shop.cgi/page=...211822823.1042
the symmetry of the plane in fully neutral, so the only factor that can cause roll is induced yaw moment or torque induced yaw/roll. balance it 1/2 or 1 oz left wing heavy and try that too. It should stall evenly. very fine adjustments.
my 2c.
05-28-2008, 11:03 PM
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RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: gooseF22
Not sure I buy that. the real yak has a left turning engine, so P factor is reversed. If it does it with power on or power off, then you have a little too much right trim. take a smidgeon of the right thrust out by putting a washer behnd the right side motor mount and retrim thr rudder.
the symmetry of the plane in fully neutral, so the only factor that can cause roll is induced yaw moment or torque induced yaw/roll. balance it 1/2 or 1 oz left wing heavy and try that too. It should stall evenly. very fine adjustments.
my 2c.
ORIGINAL: Ferocious Frankie
This is a specific trait of the plane. All and I mean all Yaks do this. My .90-1.20 Yak does this, a friends 50cc Yak does this, another friends 35% Comp Arf Yak-55 does this,... It's just something that is incorporated into the Yak's design. Full scale Yak pilots use a lot of rudder in their maneuvers beacuse of this trait. I think it has something to do with the round fuselage design. You have to live with it and correct it in flight.
For your prop, take a look at Vess Sport props. I had an APC 18x6W before and it was just too heavy and put too much of a load on the engine. Now I have a Vess 18x6 on mine and the combination of the lightness of the wood prop and the shape of the Vess propellers makes this thing really wring the plane around. Looottsss of powwweeerrrrr!!!
http://www.eastrc.org/shop.cgi/page=...211822823.1042
ORIGINAL: TomTreese
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??
I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
I think I've asked this question before??? Have you noticed this??
When flying level and pull a hard up elevator the Yak always wants to roll right. I have checked my elevator throws and they appear to be moving the same amount and speed??[
] If I add a little left aileron ,Pull the stick a little left whith the up, it's better but I'm not sure if it's a throw problem or airframe problem??I am using a 17X6 APC on my Saito 150. Works fine for 3D and hovering as well as pattern. I want to try a 16X8 APC.
I previously tried an 18X6 and 18X8 MAS on my Saito 180 on the Ultimate and the engine didn't like that heavy prop. So I now have a 17X8 APC on the 180.
For your prop, take a look at Vess Sport props. I had an APC 18x6W before and it was just too heavy and put too much of a load on the engine. Now I have a Vess 18x6 on mine and the combination of the lightness of the wood prop and the shape of the Vess propellers makes this thing really wring the plane around. Looottsss of powwweeerrrrr!!!
http://www.eastrc.org/shop.cgi/page=...211822823.1042
the symmetry of the plane in fully neutral, so the only factor that can cause roll is induced yaw moment or torque induced yaw/roll. balance it 1/2 or 1 oz left wing heavy and try that too. It should stall evenly. very fine adjustments.
my 2c.
No B.S., I actually know a former full scale aerobatic pilot named Mike Conrardy. He now owns a hobby shop here in California and I talked to him about this "problem". His exact words were "All Yaks do it, even the big guys." So what I want to say is if you don't like it, try to fix it, if it works out great, if it doesn't then you know why. I don't have any problems with my Yak as I fly the "problem" out in the air. BTW, my trims on my plane are dead on.
05-29-2008, 12:14 PM
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RE: Introducing the new 90-1.20 Yak QB
I buy it! All of my 3D'ers do it, and I know they are balanced, CG and laterally, and thrust may be an issue, but I'm sure they are set properly as well. Vertical up and downline, and horizontal tracking is good with no trims added at 1/2 and 3/4 throttle settings.
06-03-2008, 05:38 AM
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RE: Introducing the new 90-1.20 Yak QB
Anybody flying this plane with an OS 160? I know it would be better with a gasser or even a 4 stroke but I have the OS and I am looking for a home for it.
Any help would be appreciated.
R/C Foolish
Any help would be appreciated.
R/C Foolish
06-03-2008, 07:28 AM
#1285
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RE: Introducing the new 90-1.20 Yak QB
At slower speeds and low throws it is ok. It's only when you go over 60% elevator throws that it wants to roll. This is probably due to the sudden loss of lift, air speed over the wing, that make it unstable?? I can avoid it by using a little left aileron with the up elevator.
My Yak is balanced laterally and is balanced to fly hands off inverted.
Just have to fly the plane. It's not a trainer. Very touchy elevator!!!
My Yak is balanced laterally and is balanced to fly hands off inverted.
Just have to fly the plane. It's not a trainer. Very touchy elevator!!!
06-03-2008, 08:32 AM
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RE: Introducing the new 90-1.20 Yak QB
This Yak is a keeper!
Just put an APC 17-6 on the OS 120 AX last night based on feedback posted here.
Anyone got the Aeroworks wing/stab bags?
Thanks in advance,
Steve
Just put an APC 17-6 on the OS 120 AX last night based on feedback posted here.
Anyone got the Aeroworks wing/stab bags?
Thanks in advance,
Steve
06-03-2008, 08:50 AM
#1287
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RE: Introducing the new 90-1.20 Yak QB
http://www.hobby-pak.com/indexmain.htm
Check out this site for wing bags. I have one for my Edge and Yak.
Check out this site for wing bags. I have one for my Edge and Yak.
06-03-2008, 09:05 AM
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RE: Introducing the new 90-1.20 Yak QB
Thanks,
Custom work here scroll down for Aeroworks YAK I love it but....$$$ http://www.covermewingbags.com/nvTX.htm
Custom work here scroll down for Aeroworks YAK I love it but....$$$ http://www.covermewingbags.com/nvTX.htm
06-03-2008, 06:00 PM
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RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: TomTreese
At slower speeds and low throws it is ok. It's only when you go over 60% elevator throws that it wants to roll. This is probably due to the sudden loss of lift, air speed over the wing, that make it unstable?? I can avoid it by using a little left aileron with the up elevator.
My Yak is balanced laterally and is balanced to fly hands off inverted.
Just have to fly the plane. It's not a trainer. Very touchy elevator!!!
At slower speeds and low throws it is ok. It's only when you go over 60% elevator throws that it wants to roll. This is probably due to the sudden loss of lift, air speed over the wing, that make it unstable?? I can avoid it by using a little left aileron with the up elevator.
My Yak is balanced laterally and is balanced to fly hands off inverted.
Just have to fly the plane. It's not a trainer. Very touchy elevator!!!
Program in some expo and see what happens. My elevator only gets touchy at stall speeds, but flying I have no problems.
06-03-2008, 06:56 PM
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RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: TomTreese
I have 40% expo on the elevator.
I have 40% expo on the elevator.
06-04-2008, 04:39 AM
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RE: Introducing the new 90-1.20 Yak QB
Just about finished building mine and was wondering if it is essential to use the R clip wing retainers.
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys use them?
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys use them?
06-04-2008, 05:13 AM
#1296
RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: LangerLad
Just about finished building mine and was wondering if it is essential to use the R clip wing retainers.
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys that use them?
Just about finished building mine and was wondering if it is essential to use the R clip wing retainers.
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys that use them?
Dave
06-04-2008, 05:53 AM
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RE: Introducing the new 90-1.20 Yak QB
Does anybody know how this plane flies with an OS 160 on the nose? I have the motor and I ordered my plane from Chief.
R/C Foolish
R/C Foolish
06-04-2008, 07:40 AM
#1298
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RE: Introducing the new 90-1.20 Yak QB
ORIGINAL: LangerLad
Just about finished building mine and was wondering if it is essential to use the R clip wing retainers.
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys use them?
Just about finished building mine and was wondering if it is essential to use the R clip wing retainers.
Never seen them on any other model and are a bit of a pain to fit plus it still has the normal wing retaining bolts.
Do all you guys use them?
I use a 2" twist tie around the top of the clip which make them easier to remove. On two of them you need to drill the wood under the tube so the tip will go all the way in. They take less than a minute to install and it could save your $1,000.00 Yak.
I also use a lock washer on the wing bolt.