RE: New Wild Hare Sukhoi ready to fly  
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RE: New Wild Hare Sukhoi ready to fly - 9/17/2006 3:57:29 PM   
rctom



Posts: 5281
Joined: 5/8/2002
From: Flower Mound (near Dallas), TX, USA
Status: offline 		There are two aileron servos per wing. I have not tested the plane with a single aileron servo but it looks like it ought t9o work, they are nice stiff ailerons. But it's not designed that way so you are on your own in testing it.

TF

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RE: New Wild Hare Sukhoi ready to fly - 9/17/2006 5:20:58 PM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		When I was putting the one prototype together RTK and I looked at the aileron servo installtion for a bit with the same question, will one servo work per wing? The end result of the session was that RTK thought one would, and that I thought it might. I'm with Tom all the way on someone else being the test pilot.

If a single aileron works it would be great, but like the Comp 2.6, it would suffer a performance loss that's very noticeable. The speed and crispness of a dual servo installation would no longer be present. I've flown both and I much prefer the "feel" and action of a double aileron servo installation over a single.

Money would be saved in a single servo installation but why set up a large, extremely high performing aerobat to perform less capably than it could?

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If you can''t fix it with a hammer, you have an electrical problem.

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RE: New Wild Hare Sukhoi ready to fly - 9/17/2006 6:24:38 PM   
dhooks



Posts: 1043
Joined: 10/7/2002
From: Lake Butler , FL, USA
Status: offline 		Cause some of us are just cheap beggars?

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RE: New Wild Hare Sukhoi ready to fly - 9/17/2006 6:55:16 PM   
mrbigg



Posts: 2982
Joined: 10/30/2004
From: Streator, IL, USA
Status: online 		Times is hard! I have two burned up 8611's that I'm sending in to get fixed. I guess them will be the extra 2 that I need.

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RE: New Wild Hare Sukhoi ready to fly - 9/17/2006 7:28:40 PM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Two extremely valid points!

I had to do the same thing for my extra servos. Fortuntely they got back before either me or the plane got here.

One item that's kind of important, even more so for someone planning to use an 80 for the power plant. The farther forward the engine is mounted to place the prop ahead of the cowl ring the better the engine/prop performance will be. I can see where someone mounting an 80 with the back of the prop 1-1/2" forward of the cowl ring could easily have better performance than someone using a 100 with the back of the prop up against the ring.

That's a large "dead air" area immediately in front of the cowl and locating the engine with the prop tight to the cowl cancels out any thrust that the center 10 inches of the prop produces.

_____________________________

If you can''t fix it with a hammer, you have an electrical problem.

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RE: New Wild Hare Sukhoi ready to fly - 9/25/2006 4:29:40 AM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Sukhoi Flight Update

I've put about 26 flights on the Sukhoi now and in some cases flown it a lot harder than anyone should ever fly a plane. There has been nothing negative to report that I've been able to find. I've had to rearrange my elevator linkages in order to obtain the maximum deflection obtainable since I was being a bit conservative at first.

I put the plane to the maximum stress test today, and ya'll have to agree that the following is pretty stressful. Straight and level at an estimated 80 to 90mph. 55 degrees of elevator available and 55 degrees of elevator deflection used for a sudden high speed wall. The plane went absolutely vertical instantly from level and did not complain. Landed immediately after for a structural inspection and all was well. Hinges good, elevators still solid and secure, servos still tight in their pockets, linkages straight, fuselage without stress indicators. This is not something you want to do all the time. High speed entries into walls are not the smartest things to be doing.

The plane is built to take it though and still come in pretty light for it's size. I'll be shaving 2 pounds off of one of the production planes through a lighter engine selection (115) and a change to lipoly batteries.

Knife Edge spins are really pretty. I still can't get over how predictable and controllable all the various spin entires are. Hovers like it's at attention. I like it, Tom!! I'll be talking to you about shipping the next one when I get back early next year. The box is too big for my wife to consider wrestling with otherwise I would have it at the house waiting when I got home.

_____________________________

If you can''t fix it with a hammer, you have an electrical problem.

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       Post #: 231

RE: New Wild Hare Sukhoi ready to fly - 9/27/2006 8:54:24 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		A few ?'s for you guys... just things I missed or couldn't figure out fromt he pics...

1) Are the wings foam? Looks like in one 1 of the pics. How stiff are the wings... much flex too them?

2) Landing gear... strangest setup I've seen. Is there a lot of beef behind the vertical blind nuts? Seems like a hard landing might rip the sides out of the fuse... can't be easy to fix the way it's set up.

I love the looks of the plane!!!

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RE: New Wild Hare Sukhoi ready to fly - 9/27/2006 3:30:56 PM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		The wings on the prototypes are sheeted foam. The skinning is a lot better than I'm used to seeing. They are very stiff and I have not noted any observable flex though some very high stress conditions.


The landing gear mounting method is being changed to eliminate the possibility of what you noted. Tom would have to answer as to how. I have not had an issue to date with the way they are, but Tom came to the same conclusions you did and the decision was made to change the mount.




< Message edited by Silversurfer -- 9/27/2006 9:18:36 PM >

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If you can''t fix it with a hammer, you have an electrical problem.

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RE: New Wild Hare Sukhoi ready to fly - 9/27/2006 4:11:00 PM   
rctom



Posts: 5281
Joined: 5/8/2002
From: Flower Mound (near Dallas), TX, USA
Status: offline 		Pat is not entirely correct.

The mount design will stay as it is but we are adding a reinforcing strap to hold the two gear legs together.

If one wants to have canisters on a Sukhoi this is really the only way to do it. The standard gear setup has been tested thoroughly and many many bounced landings (intentionally) on a rough field. It held up fine but showed signs that continued punishment might eventually pull the gear legs apart.

For anyone who flies on a decent field and who can make a fair-to-good landing most of the time the Sukhoi gear will hold up fine. If you are constantly bashing it then add the support strap to take the load off the motorbox sides.

TF

(in reply to Tired Old Man)
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RE: New Wild Hare Sukhoi ready to fly - 9/27/2006 9:22:23 PM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Thnks, Tom. That's why I said you would have to add input on the gear thing.

As I said, I have not experienced any issues at all without the reinforcing strap. I'm not running cannisters either, so that's not an issue. I usually fly from a paved surface and I've only bounced a couple of landings, again with no issues, and I don't see that as becoming a problem. Tom e-mailed the reinforcement method if I chose to add it but have not found a need to do so.

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If you can''t fix it with a hammer, you have an electrical problem.

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RE: New Wild Hare Sukhoi ready to fly - 9/28/2006 4:27:19 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		I guess you are talking about a strap between the gear legs outside the fuse... that sould make it bomb-proof--- stronger than conventional gear.

If you have flown a QQ Yak, would would you say the handling differences are? I'm not looking for better or worse, just differences int things like flight speed, downline speed, snaps, rolls, etc... I can't decide what plane to get --- that being said there are a friggen' ton of QQ Yaks out there.

Also, how do the carbon rods wear in the hinges? Isn't the carbon harder than the pheonelic? Could you use something like aluminum that won't wear the pheonelic? I could be way off with this... never had a comp-arf. I just don't my hinges to wear out. I generally fly planes for a long time.

Keep the updates coming!

Cheers

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RE: New Wild Hare Sukhoi ready to fly - 9/28/2006 4:44:12 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		Oh yeah... the 121" Extra is also a possible contender... so many choices in life.

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RE: New Wild Hare Sukhoi ready to fly - 9/28/2006 5:24:43 AM   
rctom



Posts: 5281
Joined: 5/8/2002
From: Flower Mound (near Dallas), TX, USA
Status: offline 		The Sukhoi's hinges will have brass bushings for smooth tight operation.

TF

(in reply to sillyness)
       Post #: 238

RE: New Wild Hare Sukhoi ready to fly - 9/28/2006 6:18:46 AM   
Tired Old Man


 

Posts: 12012
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		I'm sorry I can't provide an answer to the yak qustion. The one I have flown was considerably smaller to the QQ. I do know that the big Yaks have some differences between how they do a K/E spin and what they should look like. The Sukhoi does them very, very well. The flight speed of the Sukhoi is one the easiest to control that I have ever seen. As Tom said some time earlier, on a downline the Sukhoi will pick up a little speed and then stabilize at it's own terminal velocity, which is much slower than standard cowled planes. I will also attest to that. On the horizontal plane it takes very little power to maintain a very managable speed that will also permit the completion of a lot of maneuvers without much of a throttle change. Doing a one speed routine will be very easy to maintain with the Suki, and it will not need to be a fast speed at all.

Snaps in either direction are ultra easy to nail the center, or starting point, and vertical snaps are very easy to maintain a true vertical line with. An avalanche is a "no brainer". Anyone can probably do one nearly perfectly on the second try. The plane is just very, very precise in the way it responds to control inputs. With the exception of two, everone that has flown it has said it is the best plane they have ever flown. One of the two flys a 40% C-arf 260 with a 3W-157ts, which is a bit different class of plane, but he did have a lot of very nice things to say about the Sukis 3D abilities. The other hold out is RTK, and I think he's still miffed at me becuse I told him I believe the Suki to be a better flyer than his 330

There's something I'm working on, using the rudder after a wall, that I'll get back to ya on after I work it out. I'm under the impression that this plane should be able to do a full rudder pinwheel after reaching the end on the wall and recover nicely. This is going to take some practice but I'm pretty sure it can be done. Especially by someone (which is 'bout everybody anymore) better than me. Rolls with the Suki are truly axial. You should see it harrier roll I'm dead on serious that the wings just go round and round with absolutely no wobble to be seen at the nose or tail. It was just awesome to watch, especially since I'm not good enough to have done them that well myself.

I have not yet noted any wear at the rod/phenolic intersections. That's something I have been watching for due to the reasons you noted. Tom already has a change in place to remedy any potential for problems in that area as he already noted.

_____________________________

If you can''t fix it with a hammer, you have an electrical problem.

(in reply to sillyness)