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E-Sky › Just finished building my second Grayson Hobby 3D EPP Sukhoi
04-02-2009 07:34 AM  9 years agoPost 81
racin06

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Indianapolis, Indiana

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...but it's not a "trainer"
The Sukhoi is my first airplane . So, I would say that if you have a couple of years of helis under your belt and have put in many hours on the sim flying airplanes (I probably have 100+ hours on the sim), then the Sukhoi can be a decent trainer. A total newbie with no RC experience?....then no, the Sukhoi is not a good first airplane.

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04-02-2009 11:43 AM  9 years agoPost 82
tryan02

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Canton, Missouri

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compete with any aerobatic plane on the market
Although I've flown it only like 4 times I'm not so certain I'd go to this extreme statement.
What I meant by that melnic is there is almost no aerobatic maneuver the sukoi cant perform and perform well.

Unlike a high wing flat bottom trainer.

And sorry racin I have to disagree with you on its training issue's because of its strength and power really dumb down the control surfaces (no need for 45 degree deflection) and it would be an excellent first airplane as it was for you. Especially in the takeoff and landing aspect. The sukoi is easier to takeoff and land than my alpha 40 trainer the only pro of trainer vs sukoi is the stability of the trainer high wing loading and dihedral tends to (self right) in forward flight.

No Really I am the club President!!!

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04-02-2009 12:19 PM  9 years agoPost 83
Melnic

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Columbia, MD,USA

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Mine wants to roll out and push down out of a hard knife edge.
Maybe my thrust angle is off but after flying plenty of planes, I'm not ready to say it can keep up w/ the manuevers of even a moderate sport plane. I've flown better. But never anything nearly as rugged and light as this.
With the ruggedness comes the flexability of that foam. You can't have flexability and get the accuracy to do a manuever w/o having to grossly compensate the other control surfaces. I'll keep working on it.

If this is your first RC plane, your doing great!

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04-02-2009 02:57 PM  9 years agoPost 84
tryan02

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Canton, Missouri

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Yes mine too does fall out of maneuvers but hey it has a square airfoil and a tail that twists with pressure (I think this is knifedge problem considering gussets). So I am ridiculously impressed with its aerobatic abilities I would definitely classify it as a sport trainer and for a few bucks you can do a heck of a lot worse. Its better than any overpriced parkzone trainer.

No Really I am the club President!!!

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04-02-2009 07:36 PM  9 years agoPost 85
Melnic

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Columbia, MD,USA

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Flew the Sukhoi 3 times this morning by the time the "regular" morning crowd arrived. One guy flew his 1.08 size plane and then decided it was too overcast and foggy to fly so I flew the Sukhoi while they were there and one of them filmed the flight.
I also let him fly the plane after I flew it. He commented that once you get used to it, it flew pretty well. I have about 20% expo on it and he did pretty well w/ it considering he's never flown a foamie or anything that small. He learned planes about a year ago but is out flying nearly every morning till noon and has become pretty good for a newbie. I think he'll be getting one as a backup plane to fly
Here is the edited video from this morning:

Watch at YouTube

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04-02-2009 08:07 PM  9 years agoPost 86
tryan02

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Canton, Missouri

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hate not being able to watch youtube vids at work.

No Really I am the club President!!!

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04-02-2009 08:12 PM  9 years agoPost 87
broggyr

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Naugy, CT

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Same here. I just got a data plan for my cellphone, and I am able to watch them again

- Brian
irony [ay-ruh-nee', ay-er-nee'] adj.: Like goldy or bronzy, but made of iron

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04-02-2009 08:38 PM  9 years agoPost 88
Melnic

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Columbia, MD,USA

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hate not being able to watch youtube vids at work
I can't either!

If I film at lunch and edit when I get back, I have to ftp this to my home PC then upload it from there using remote desktop. One day I'm going to somehow set up a proxy server from my home computer. But not until I learn how to do that w/o hackers getting in.
Same here. I just got a data plan for my cellphone, and I am able to watch them again
SWEET!

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04-02-2009 10:38 PM  9 years agoPost 89
racin06

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Indianapolis, Indiana

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Melnic, great flying! You really showcased the capabilities of the Sukhoi...much better than my Sukhoi videos . I see that your Sukhoi's tail also twists as in my Sukhoi...still flies great, though .

Tyran, Melnic and I have both posted videos of our Sukhoi's in action. We are waiting for your Skuhoi video .

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04-02-2009 11:21 PM  9 years agoPost 90
tryan02

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Canton, Missouri

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great vid melnic love that you showed its durability!!!!

Due to cutbacks I am off work on friday's only when its convenient for them.

I am off tomorrow loading up the jeep and making a day of it the sukoi the alpha trainer and of course the raptor but the REX well thats debatable.

No Really I am the club President!!!

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04-03-2009 12:12 AM  9 years agoPost 91
Melnic

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Columbia, MD,USA

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thx, yea, 2 things i noticed in the video:
the tail twisting and the low speed high rate rolls looks cool when you see the ailerons.
I wonder if I can use some more foam on the corners going lengthwise to stiffen it up w/o making it more tail heavy.

Also, I got home and noticed that the toothpick I used to originally add down and right was long gone. Probably from the first day. I'll add a plastic washer or plastic nut or something this time. Then I'll try those knife edges.

My HD camera came in today so I'll have the hat cam operational next week to try some more vids.

Tryan, make sure your off on good weather days
I'm off every other week but that just means I know how to forcast rain

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04-03-2009 12:46 AM  9 years agoPost 92
tryan02

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Canton, Missouri

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the dave powers website has the extra 300 plans in free pdf format it uses a CF rod all the way down the fuse.
(been considering it on the sukoi myself)

No Really I am the club President!!!

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04-03-2009 02:23 AM  9 years agoPost 93
Melnic

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Columbia, MD,USA

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I put a CF rod on the bottom going from the end of the tail up about to around where I have my servos (think it's in my pic)
But that won't help w/ the twist.
You know how a Lama tail is w/ the diagonal braces? that's how you take care of twist. Foam in the corners I think is about the only way to go but if you can think of something, let us know.
We need torsional strength in the tail.
Cover it w/ a film and it would be REALLY good but the shape we have now Won't really permit that unless we had some sort of lightweight shrink wrap.

There's a guy at my field that has a giant flying wing. He can fly it for over and hour on a 5000 mAh battery. I think it's an 8S. Amazing and it's not slow either. I think he's got film covered EPP foam.

Here's a pic of it:

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04-03-2009 02:43 AM  9 years agoPost 94
tryan02

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Canton, Missouri

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If we covered it we would have to round all the corners.

If you glance at page 11 of the online manual they added gussets horizontal to the fuse and parallel to the horizontal stabilizer. I can see this would help but I think by the time you throw on the foam and glue it would add more weight than help the twist problem.

No Really I am the club President!!!

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04-03-2009 03:04 AM  9 years agoPost 95
Melnic

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Columbia, MD,USA

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yea, I saw those gussets but that only helps that small area from folding up (folding motion from the side). It won't help torsional stress.
I'll be the guinea pig and try it. I can always cut it off w/ a new xacto.
What I think I can do is to support the wing, then place a weight on the horizontal stab somewhere. Then add the extra foam, then measure again.
Tonight's my night to not do any building or fiddling. I'll try tomorrow or the weekend.

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04-03-2009 09:12 PM  9 years agoPost 96
tryan02

rrProfessor

Canton, Missouri

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Major crash today with the sukoi!!!!!

I was doing low rolls on a windy day I think you guys know how the second and third rolls fall out with a headwind? Well I was rolling 10ft off the ground on the second not only did it fall out of it inverted on the second one it was hit hard by a gust dropped like a rock well I pulled up instead of forward.

Yep faceplanted it dead on prop was square with the ground only nicked the prop but cracked the fuse in four places (across the fuse not with it) all the way from the head to the last crack on the tail.

drum roll please!!!!!!!

The motor mount was unscaved never even budged!!!!

Oh and get this I thought what the heck I fired it up, it spun so I threw it into the air and flew fine all busted up rolled it a few more times and brought it back in.

No Really I am the club President!!!

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04-03-2009 09:28 PM  9 years agoPost 97
broggyr

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Naugy, CT

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LOL! Nice return to form, with a little "Oh yea? Check THIS out!" thrown in for good measure

- Brian
irony [ay-ruh-nee', ay-er-nee'] adj.: Like goldy or bronzy, but made of iron

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04-03-2009 09:40 PM  9 years agoPost 98
Melnic

rrElite Veteran

Columbia, MD,USA

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If you would have had a prop saver or the rubber band mount you would have just had to pick the prop up or put a new rubber band on.

Am I the only one in thinking that this plane wants to roll on the deck? I mean, sometimes I can hear it saying that to me in the air. Or am I hearing things? That and "fly me over that pond, I can float you know"

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04-04-2009 04:27 AM  9 years agoPost 99
Melnic

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Columbia, MD,USA

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Before and after pics of adding 1/2 inch strips on all 4 corners going from cockpit area to tail.

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04-06-2009 06:46 PM  9 years agoPost 100
Melnic

rrElite Veteran

Columbia, MD,USA

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Flew this morning w/ some Helicopter buddies.
Middle of the flight, the winds picked up and started raining. Almost pouring down, turned sharply around and dumped it right in front of me as the winds kicked up and changed directions. The motor mount came unglued as the prop was directly downward when it hit. It will hot glue back on fine, but I think my rubber bands are too tight.
I"m going to try and put that prop saver back on and hope it does not come off in flight. I also wish they'd make the prop saver rubber piece not black. That will be hard to find in the grass if I lose it.

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