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RE: Seagull Yak? - 4/24/2011 10:54 PM   
Gehrbox



Posts: 12
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Last Login: 6/5/2013
From: Charleston, SC, USA
Status: offline 		Maidened my Yak 54 today. Nice plane. Very groovy flyer.

Powered by a brand new Saito 125. Removed the pilot and canopy floor to lose 4.33 oz of weight behind the CG. Needed 2.5oz of lead on the inside of the firewall to balance with CG at 5.5in from root LE. Would have taken a lot more weight in the nose if I had not cut out the canopy. Ended up weighing 10lb even. Don't know what people are doing to get in under 10 lbs. Could be a lot of variation of wood density between kits. I mounted my LiFe battery to the front of the wing tube. This was for convenience in charging. If I had mounted it between the fuel tank and firewall I would not have needed the 2.5oz of lead in the nose.

Gotta love Saito, one flip start every time today from first breakin start till last of the day. Turned a 16x6 APC prop at 9000 rpm. Tick over idle at about 2200 rpm. Flew it without the spinner, the one that came with the kit kept slipping which resulted in a loose prop when hand starting.

Nice predictable 3 point landings every time. Effortless knife edge flight. Little or no coupling. I don't normally fly 3d, but this has been the easiest plane to hover I have owned. Even though the engine is not nearly broken in, I had no problem hoving. Pull out from hover was not a problem, but not rocket like either. Had quite a bit of wing rock when attempting to harrier. Likely will improve as my experience with the plane grows.

Rolls axially and quickly even on low rates. Wanted to break left or right when stall testing, but was predictable and controllable at idle with full up elevator on low rates. Inverted flight needed little or no elevator for level flight. Seemed pretty neutral at any speed. Bleeds speed very quickly on approaches at idle.

Post flight inspection revealed that the cowl mount points need to get beefed up. One of the mount screws had wallowed out it's hole. Otherwise it was ready to fly again.



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RE: Seagull Yak? - 4/25/2011 4:04 AM   
Sourkraut



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From: Redneckville, CANADA
Status: offline 		Mine is weighing in at 9lbs 12oz on a digital paint scale with a Saito 180... very accurate. My YAK balances spot on at 5 1/4 inches back of the leading edge at the wing root with the battery behind the servo tray. All stock, did not cut anything out to lighten it!

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RE: Seagull Yak? - 4/25/2011 12:06 PM   
Gehrbox



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From: Charleston, SC, USA
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quote:

ORIGINAL: Sourkraut

Mine is weighing in at 9lbs 12oz on a digital paint scale with a Saito 180... very accurate. My YAK balances spot on at 5 1/4 inches back of the leading edge at the wing root with the battery behind the servo tray. All stock, did not cut anything out to lighten it!


I weighed myself on my bathroom scale, then picked up the plane and weighed us together. The difference was 10 lbs. The scale only does increments of half pound, so it could be anywhere between 9.6 and 10.5 lbs. Judging by the performance I would think it was closer to the former.

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RE: Seagull Yak? - 4/25/2011 1:45 PM   
LSP972


 

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From: Zachary, LA, USA
Status: offline 		Mine is 9.4 pounds, with a Laser 150. I needed no extra weight, with the battery up against the second former (behind the tank). I have c/f mains and an Ohio Products Haigh tail wheel, otherwise all stock.

I flew it Saturday, but the wind was so bad I couldn't get it trimmed properly, much less evaluate its flight characteristics. As I feared, the Laser 150 is just enough motor... IOW no unlimited vertical. However, I was flying a 17X6 wood prop (forget the make, but its one of those scimitar-bladed "custom" jobs) and I was only getting 8500 rpm. I usually run a 16X8 Graupner on that engine, which produces 8800 rpm. That prop is on it now for the next flights.

Hopefully, the wind be out of here by this week-end.

.

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RE: Seagull Yak? - 4/26/2011 4:45 AM   
Sourkraut



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From: Redneckville, CANADA
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quote:

ORIGINAL: Gehrbox


quote:

ORIGINAL: Sourkraut

Mine is weighing in at 9lbs 12oz on a digital paint scale with a Saito 180... very accurate. My YAK balances spot on at 5 1/4 inches back of the leading edge at the wing root with the battery behind the servo tray. All stock, did not cut anything out to lighten it!


I weighed myself on my bathroom scale, then picked up the plane and weighed us together. The difference was 10 lbs. The scale only does increments of half pound, so it could be anywhere between 9.6 and 10.5 lbs. Judging by the performance I would think it was closer to the former.



I quit trying to weigh my planes on a bathroom scale, they are not accurate at all. My digital bathroom scale will give a differant weight each time I get on it. I will weigh myself 3 times in under a minute and can get 2-5 lbs differance each time. So now I weigh all my planes on the digital paint scale from my body shop!

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RE: Seagull Yak? - 4/26/2011 11:20 PM   
Gehrbox



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quote:

ORIGINAL: Sourkraut

I quit trying to weigh my planes on a bathroom scale, they are not accurate at all. My digital bathroom scale will give a differant weight each time I get on it. I will weigh myself 3 times in under a minute and can get 2-5 lbs differance each time. So now I weigh all my planes on the digital paint scale from my body shop!


Historically mine has been more consistent. I weighed myself and me holding the plane several times. It came out the same every time. Still, judging by the performance it has to be closer to 9.5lbs then 10lb. My scale has 1/2 lb increments, so is probably indicating up to a half pound high.

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RE: Seagull Yak? - 4/28/2011 2:34 PM   
Sourkraut



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From: Redneckville, CANADA
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quote:

ORIGINAL: Gehrbox

quote:

ORIGINAL: Sourkraut

I quit trying to weigh my planes on a bathroom scale, they are not accurate at all. My digital bathroom scale will give a differant weight each time I get on it. I will weigh myself 3 times in under a minute and can get 2-5 lbs differance each time. So now I weigh all my planes on the digital paint scale from my body shop!


Historically mine has been more consistent. I weighed myself and me holding the plane several times. It came out the same every time. Still, judging by the performance it has to be closer to 9.5lbs then 10lb. My scale has 1/2 lb increments, so is probably indicating up to a half pound high.



Must be a damn good house scale..... If it's working good, then carry on! Mine is a Walmart special!

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RE: Seagull Yak? - 4/30/2011 7:00 PM   
Sourkraut



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From: Redneckville, CANADA
Status: offline 		Done and flight ready.......here are a few pics

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RE: Seagull Yak? - 4/30/2011 7:04 PM   
jamersoniiv


 

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From: New Carlisle, OH, USA
Status: offline 		Very nice :-) good luck with the Maiden flight!


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RE: Seagull Yak? - 4/30/2011 9:38 PM   
RCplanman


 

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From: Rochester, NY, USA
Status: offline 		Sourkraut, WOW, Looks grear . Good luck on your maiden. Bill

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RE: Seagull Yak? - 5/1/2011 3:42 AM   
ckangaroo70



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From: London Mills, IL, USA
Status: offline 		I flew mine yesterday with the G23 on the nose swinging a APC 16x8 and I was very pleased. It had plenty of power for my taste and the plane flew rock solid. I read early in this post that some thought a gas engine was a poor choice for this plane due to its size, but I have to say that I thought the plane carried the weight of the gasser just fine. It was a joy to fly and landings were a breeze. After three flights I left the field feeling pretty good about my setup.

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RE: Seagull Yak? - 5/1/2011 3:45 AM   
ckangaroo70



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From: London Mills, IL, USA
Status: offline 		Forgot to post a couple pics.

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RE: Seagull Yak? - 5/1/2011 12:42 PM   
RCplanman


 

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From: Rochester, NY, USA
Status: offline 		ckangaroo70, Congrats on your maiden . Looks like you have the w/G-23 WELL hidden in that cowl. I'd like to see a couple more pics of your cowl set-up
to see where your carb & muffler exit. Please & thanks, Bill

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RE: Seagull Yak? - 5/1/2011 7:19 PM   
Slow and Steady


 

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From: Hollywood, FL, USA
Status: offline 		This plane looks like a good candidate for the DLE 20, which weighs less than 30 oz, with the ignition; weight could also be saved using a Battery Eliminator circuit on the ignition. I had this plane with a OS 91FX and agree it is alot of fun. For sport flying, it is similar to my EF 50 cc Yak for overall responsiveness; maybe due to the Yak wing design and flat front on the large cowl. Don't get me wrong, it is not an EF Yak, but it is definitely alot of fun and very responsive. Really liked this plane!

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RE: Seagull Yak? - 5/1/2011 9:17 PM   
ckangaroo70



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From: London Mills, IL, USA
Status: offline 		Bill

My muffler is pretty much hidden with only some minor cutting around it, but my carb side had quite a bit cut around it just for the fact I made space to install a panel upon which my fueler and on/off switch is mounted. I also have some heavy black screen that gets installed around the venturi that is sticking out. I usually go for easy access over neatness...so sometimes I am not the best example to follow.

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RE: Seagull Yak? - 5/2/2011 12:13 AM   
RCplanman


 

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Status: offline 		ckangeraoo70, Thanks, looks good to me. I'm suprised that most of the muffler is inside the cowl. I like to use a G-38 muffler on the 23much smaller, if you happen to have one take a look. Cheers, Bill

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RE: Seagull Yak? - 5/2/2011 12:47 AM   
ckangaroo70



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From: London Mills, IL, USA
Status: offline 		Bill

Thanks for the tip. I actually do have a stock G38 muffler laying out in the shop not being used for anything now that you mention it. I had a G38 on my Giant Super Sportster and had a muffler on it that wacker engines made for me. I sold that plane, but still have that stock G38 muffler laying around. I guess it never even crossed my mind that the muffler off a G38 would mount up to my G23. I will have to check that out. Thanks again.

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RE: Seagull Yak? - 5/2/2011 1:17 AM   
RCplanman


 

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Status: offline 		ckangeroo ,I think the only mod is to take a rat tail file & "ajust" the mounting holes a tad. Bill

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RE: Seagull Yak? - 5/2/2011 9:04 AM   
ian55


 

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From: Peterborough, UNITED KINGDOM
Status: offline 		https://lh3.googleusercontent.com/_c7EF7xnIAJ0/TanStWmY2lI/AAAAAAAAJms/DyRB24hSo2M/s912/DSC01844.JPG
https://lh5.googleusercontent.com/_c7EF7xnIAJ0/TatVDPHFP9I/AAAAAAAAJ-w/3px-l6Br1lc/s912/DSC02239.JPG

Don't know if the above links will work, but they are a couple of pictures of my Yak with a DLE 20. All up weight approx 9 pounds.Weighed 81/2 pounds with a Super  Tigre 90 fitted, but swopped it for the DLE 20 before it flew, only added about 6oz. Flies beautifully with a 17x6 Vess prop.

Regards Ian


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RE: Seagull Yak? - 5/4/2011 9:28 PM   
raydar


 

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Your set up sounds great,   9 lb with 14 lb of thrust sounds like alot of fun. I tried to order a dle 20 from hobbyking for mine but alas they dont stock them anymore, have ordered a rcg 20 beam mounted from them instead and am hoping for similar fun.  The beam mount rcg 20 is speced as having 2.2 hp and being able to swing a 16 6 prop but on the crgf website the same? engine is listed as being 2.9 hp and swinging a larger prop ie dle performance, im not convinced but will report my findings when I get it .



< Message edited by raydar -- 5/5/2011 8:18 PM >

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RE: Seagull Yak? - 5/4/2011 11:06 PM   
Textanker


 

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From: Houston, TX, USA
Status: offline 		I have had this one about a month. Put a DLE-30 gasser in it with Hitec 645s all around. Weighed around 10.5. Maidened it last Friday, four flights, and WOW! Flew great! Engine was running a little fast, but I assume that was becuase of it beng new. Rolls were very clean and quick. Landing was a breeze.

Then, depression set in.

Took it out yesterday for another day. Coudln't get the engine to run right. I had installed a Smart-fly kill switch. Engine cranked right up, but wouldn't idle very well. Deadsticked after about a minute, landed no problems. Fiddled with the engine and thought I had it. Deadsticked on second flight about 1.5 mins into it. Had plenty of Alt and Airspeed, but with a stiff 10mph headwind I wasn't trying to get it back on the runway since there was good grass all around. Unfortunately I brought here down pretty fast and the LG got ripped off in a pothole I couldn't see. The plate the LG is fixed to is glued to the secondary and primary firewalls, so they let go and casued a lot of damage. Not too upset because it was just bad luck going into the hole. SHe probably would have been fine on smooth grass. I ordered a new fuse from my LHS within five minutes of recovering the pieces.

I am a little concerned about the engine not seeming to run right with the Smart-fly switch. I should have removed it and used the manual switch instead. This was my first gasser (10+ years experience with glow) and I was really having a ball flying her. Oh well. A new fuselage costs $80 on horizon. Shouldn't take too long to repair/rebuild and try again. For the price of the kit, it's worth it.

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RE: Seagull Yak? - 5/5/2011 5:45 AM   
raydar


 

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From: stirling, UNITED KINGDOM
Status: offline 		Aye only takes one landing in the rough to take the gear out as I also found out, maybe this is the arf way and they are all like this (im used to kit builds). When the gear lets go it does a fair bit damage due to the way it is locked into the fuse formers which have very little strength.  As posted before a couple of wood screws countersunk through landing gear mount into 1/4 ply braces underneath will maybe add strength and takes two minutes.

This post is not to "a told you so " but a heads up for other new yak pilots.



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RE: Seagull Yak? - 5/5/2011 12:03 PM   
Gehrbox



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quote:

ORIGINAL: raydar

Aye only takes one landing in the rough to take the gear out as I also found out,



Landing in the rough is tough on a lot of planes gear. Heck landing on a smooth surface is tough on a lot of retracts


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RE: Seagull Yak? - 5/5/2011 1:25 PM   
RCplanman


 

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From: Rochester, NY, USA
Status: offline 		I have a question. I see Nitro planes has a 56" Yak for $99.00. Isn't that the same size as the Seagull.?That sells for $ 179.00 ??
Thanks, Bill

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RE: Seagull Yak? - 5/5/2011 1:30 PM   
gehr2box


 

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quote:

ORIGINAL: RCplanman

I have a question. I see Nitro planes has a 56'' Yak for $99.00. Isn't that the same size as the Seagull.?That sells for $ 179.00 ??
Thanks, Bill


Nope the seagull yak has a 63 wing span.

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