Posts: 2168
Joined: 10/26/2002 From: CLINTONVILLE,
WI, USA Status: offline
MV99, The modds I did were easy. I Pushed out the blind nuts, plug the holes with dowel pieces. I then glued on a piece of 3/32" (5) ply birch to the front. I also sanded the red paint out of the tunnel and resealed it with epoxy. The throttle servo mount is actually rubber mounted itself plus the servo's rubber mounting. The pipe is available fron Central hobbies for about $18.00. If you mention the short SS stack, they know exactly what you are talking about. I also added 3/8" triangle stock to the inside of the engine box. I did not want to see the YS flying off with the firewall. The mount is an aluminum H9 mount, that has been lightened by my father (retired machinest). The cowel can e removed with out touching the exhaust, that is why it is opened up the way it is.
< Message edited by MOTORMAN37 -- 3/4/2008 1:09:33 AM >
Posts: 121
Joined: 6/26/2007 From: toledo,
OH, USA Status: offline
well i finally finished my yak. hopfully the weather gets nicer so i can maiden it. i used a saito 150 with a zoar 16/8 prop. used hitec 5625 in the four corners a 5985 on rudder and an hs81 on throttle. used a jr 6v 2300 battery and spectrum radio. i like running the crank breather down the landing gear for less clean up. came in at 10lbs on a bath scale and needed no weights to balance.
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Joined: 7/30/2005 From: Williamsburg,
VA, USA Status: offline
I agree with MrG. I have my Yak set up with triple rates. The low rates are about 40% and have 50% expo. THe mid rates are in the 75 -85% range with 25% expo and the High rates are 120% on the elevator and rudder with 20% expo. The plane is very control sensitive , especially the elevator, which makes landing a bit tricky on the first couple of flights. So I really reduced the low throws and uped the expo to soften the center ranges and it really helps landing and taking off. I want more responsive controls doing 3D flying so that's why the lower expo. I do not want big sudden corrections 5 feet off of the ground.
I had to return my Saito 150 to Horizon. It sounded like a coffee grinder. The problem may have been caused flying the Dape Patrick Ultimate. Weight and prop size?? However, this Saito never sounded right since day one. They found that it was pretty torn up inside??? Bearings and other rubbing wear and filings everywhere. We Negotiated a replacement. The 150 is a great enging for this plane.
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Insanity: Keep doing the same thing expecting a different result.
Posts: 434
Joined: 7/30/2005 From: Williamsburg,
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I have a way to get After-Run oil into the crankcase on those 4-stroke engines mounted under a cowl where the carbeurator air intake is inaccessable. Try to find some hypodermic syringes WITHOUT the needle. They may be difficult to acquire. A doctor freind my be able to help. You do not want the needle you just want the plastic syringe. Once the needle is off there is a plastic nipple the fits inside fuel tubing. Pour some After-run oil in a mixing cup and draw about 4 ml into the syringe. Connect the syringe to the 4-stroke bleed nipple tube and depress the plunger. Remove the syringe and draw in some air and reattach to the tube and blow the oil into the engine. Crank the prop several times to distribute the oil. You'll hear it sucking in the oil. Now you can get oil into the crankcase without removing the cowl. Hope this helps.
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Posts: 121
Joined: 6/26/2007 From: toledo,
OH, USA Status: offline
tomtreese thats good info on the afterun oil. i was triing to figure the easy way of getting it in. that sucks about the saito. my 125 did the same thing it only lasted less than a gallon of fuel before it seized up. saito replaced it but they let me upgrade to the 150 for the price difference of $30.00. what are your low rates set at. i really don't want to crash this plane and i've heard that it is sensitive.
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Joined: 9/26/2006 From: West Carrollton,
OH, USA Status: offline
Very nice James. I do the same thing with the breather tube. My yak should be here tomorrow. I decided on the HS5625MG's also. Just found out yesterday that a guy at our field that fly's a QQ 50cc yak uses 5625's on it. I was shocked, cause he gives it hell. So they are deffinately good and strong. Good luck on the maiden!
< Message edited by Jimeni -- 3/4/2008 11:29:26 PM >
Posts: 434
Joined: 7/30/2005 From: Williamsburg,
VA, USA Status: offline
O.K. her is the set up on my Futapa T7CAP Transmitter Surface Low Mid High Expo: Low Med High Endpoint Aileron 40 60 80 -40 -30 -25 120% Elivator 45 75 120 -50 -30 -25 125% Rudder 45 80 110 -40 -30 -25 125%
At least that's where they are right now. I change the mid and high numbers often but the low rates have remained the same since the first few landings. I have the high rates set for Flat-Spins, Harriers and Hovering. The Mid-Rates are for most 3D maneuvers and the Low-Rates are for Pattern, Landings and takeoffs. I use Mid or High rates to taxie so the rudder turns the tail wheel.
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did you set up the amount of throw per the manual or did u use your own throw specs. i have a feeling i might have to be more carefull to make sure i set the switch to low rates on landings. for some reason i alway take off on low rates but land on 3d rates. i don't have any issues i don't even realize until afterwards.
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Joined: 7/30/2005 From: Williamsburg,
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I originally set them to their settings but changed them after a couple of flights. I reduced the low a bit and the mid and high are for what I want to do. I realize I just gave %s and not the amount of throw. But they are close to the recommended throws. I felt the Expo was a bigger issue than the amount of throw on the low end> I use only one switch for changing rates. It's the triple switch G on the Futaba. I don't trust myself with different rates on "3" switches.
< Message edited by TomTreese -- 3/4/2008 11:56:39 PM >
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Joined: 6/26/2007 From: toledo,
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thanks, i agree i only use one switch for the different rates. there would be a good chance i will forget which switch is where and send balsa all over the hard deck.
I am getting to the installation of the stabilizer and from the moment I read the manual I felt quite uncomfortable with the way Aeroworks suggests you install the pushrod vis-a-vis the servo arm and the elevator control horn. As you can see, the momentum of the servo arm is larger than the control horn. Which will translate in a multiplied movement in the con
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Aero-Works Support >> RE: Introducing the new 90-1.20 Yak QB 
RE: Introducing... - 
The mount is an aluminum H9 mount, that has been lightened by my father (retired machinest). 
I change the mid and high numbers often but the low rates have remained the same since the first few 
