For those who are interested I am posting a couple pix of my baffled DL50. I baffle all my gassers, whether you needed or not.

You've got to be kidding me........

I thought I was gonna be the first one to post pictures of carbon baffling in this plane.........
Where I fly, it gets HOT! in the summertime, it can get into the middle to high 120's and even up to over a hundred before 10:00 in the morning. Needless to say, I need baffling- I also made a CF scoop on the bottom of the cowl to introduce air to the middle of the head as it gets blocked pretty good from the cowl-


Very nicely done!!!!! Now I have to go out and finish it up and take some pictures!!!


Dangit! You beat me!!!!!

Ha, ha, ha,
sorry I have to laugh, but I sure tricked you, didn't I? That's no CF, although it looks darn close like it. It is simple plywood painted black and then glassed over it. It came out better than expected. I like the looks of it myself I would love to see your baffle when you are ready to post some pix.

Very nice.

Do you have any pictures from the inside or when you were making these?

Bruce

How is the baffling attached to the cowl and how much does it weigh?

Obee

Next time the cowl comes off I'll shoot a picture from the inside. I will show you how it's attached. It weighs really not much to speak of, perhaps 1.5oz iff any. And since mine came out a little on the tail heavy side it was actually benefitial.

Hello everyone
Just heading off on a couple of weeks break, and would like to wish everyone a Merry Christmas and a happy new year
Be safe, slow and not to serious, hope santa brings all those good things.
So I won't Bloody well talk to you till next year LOL
Lee

First of all, I'm still a hacker trying to learn some 3D. There is a lot of wing rock when trying to harrier upright, but not nearly so bad inverted. The Sukhoi is balanced at about the middle of the wing tube and the stabilizer is in the rear most position. There hasn't been much discussion on wing rocking in this thread, so what should I be looking at or doing differently to reduce the wing rock? Any comments would be appreciated short of suggesting I find a new hobby.

Chuck

Hey Leehunt;
Same to you and the whole RC-community down under. We, on the right side of the hemisphere, have to deal with the harsh weather conditions of winter right now, whereas you mates, on the wrong side of the hemisphere, have the nice and warm climate to enjoy. We are totally jelous and can't wait for the arrival of a more enjoyable flying condition. So take advantage as long as it lasts.
Merry Christmas to y'all

Regarding the wing rock.

What you need to be looking for is getting off the ailerons with the right thumb. The Sukhoi has virtually no wing rock when the stick is aileron centered, Use the left stick with a little rudder to offset engine torque and P factor at a high angle of attack. Steer with the rudder, using the ailerons only to keep the wings level when turning. Add some expo to the ailerons.

If you are experiencing wing rock with the plane it's the operator, not the plane, with a center of wing tube c/g.

Said I was gonna post some pics of the cowl baffling, and never did...... files are huge, so I'll break it up a little..

more pics

Just for giggles, some interior shots w/smoke system...

just a couple more.. there's plenty of room in this airframe, yet not that much at the same time- ***note*** I did manage to jam a $#!Tload of stuff into this bird!!

I do like the area between the engine box and the fuse sides- great place for wires and switches!

Hey Exciter WOW! thats alot of stuff, can it still fly? Must look awesome with the smoke on. What size fuel tank is that? Is it the original? What's the weight up to?

And people frequently wonder why a 50cc plane doesn't perform like they think it should.... This is where wing rock begins with a plane that normally doesn't have much, if any.

Thanks TOM, I'll work the right thumb less next time out. It really struck me strange that I was getting the wing rock because I hadn't seen it as severe when I've tried it before, plus I've been able to do an elevator without getting wing rock. I saw your comment regarding all the hardware, adding weight leading to wing rock. Mine is devoid any of the fancy stuff and has just one A123 feeding both the engine and receiver.

Chuck

Hi Ruski-
The original tank size is 24 oz. This is not the original tank- it is 16 oz. and the smoke tank is 16 oz. as well- 7 minutes on timer with about 3 min reserve (main fuel tank) and about 3 to 3 1/2 minutes of smoke if left on at WOT. I have the pump dialed WAY down. doesn't take much oil...
The plane weighs about 19lbs, and flies great with right around 26 lbs thrust- 3mm toc53 engine with hop up kit swinging a 22/8 bunny or equivalent-
The plane looks awesome buried in smoke backing down in a hover.
KM

Hey there Tired Old Man-
I hope that this post was not in reply to mine-


And people frequently wonder why a 50cc plane doesn't perform like they think it should.... This is where wing rock begins with a plane that normally doesn't have much, if any.

I never complained personally about wing rock with this plane- Obviously, with smoke and redundant batteries, one wouldn't assume they were building the ultimate 3D machine-
Also, the camera makes it look as if it is jam packed with stuff, but that's kinda why I chose the angle...

Not to say anything bad about the plane by any means, but I found it difficult to build the plane bone stock to the 16 1/2 to 17lb range without ditching the redundancy and the ignition battery- thats only like 8 oz of battery and maybe a couple for the switches...

I have been watching the wing rock discussion. I built my SU stock with the rear elevator location. It came in right at 16.5 lbs or a bit less with the CG right at the center of the tube. I have been very pleased and impressed with the performance. However, wing rock in a right side up harrier is quite pronounced with no aileron input at all. I have never been able to stop it with aileron input (I can make it worse though). The good news is that it never snaps out of it ... it just gets quite exciting if I get lower than I should be. Inverted it is rock solid with no wing rock at all.

Hey Exciter is that a Bisson muffler? Tom said it wouldn't fit the suks round cowl, did you have change anything?

I'm simply one that believes that many people try to extract too much out of a 50cc plane. It's still of a size where, IMO, redundancy is not necessary if attention is paid to the quality of the products used and basic care in assembly. Then some load even more stuff into a plane in the name of safety, taking weight farther over the top. I know people load a smoke sysem into smaller planes and they fly, but they don't fly as well as they could. Typically after adding all the options there comes a series of public complaints about why an over loaded plane does not perform up to expectations.

I'm not stating that you are one of these but everytime I see pictures of a 50cc plane like ths I'm absolutely certain that someone else will be taking notes in order to do the same thing. As long as it suits you and makes you happy, what the heck.

Back to wing rock for a moment. A lot of factors affect wing rock. C/G, relative tail location, angle of attack, airspeed, propeller type, and the operator. When I did the first one I did not have a wing rock problem, but I also did not have the option of a two location wing group. I did use a prop that provided a tremendous amount of surface airflow at low speeds where most of the people out there do not. I sacrificed rpm for thrust where most people shoot for rpm over thrust.

Ruski-
Yes it's a Bisson pitts, and yes it fits, but you will have to be VERY creative with cutting and notching the cowl, and cutting a bit more than one would normally feel comfortable with. I must say that the lay up on the cowl is exceptional, and it's plenty strong, just kind of a pain in the rear to get the cowl on and off with this muffler-

If you (or anyone else sees the pics with it in the plane, and decide to use it, the key is to make a day of fitting, cutting, marking re-cutting, re-fitting, etc, etc, until you have taken JUST BARELY ENOUGH material to make things work- It is paramount that you leave as much cowl as possible so that it retains its integrity-)
I'll post some pics when I have the chance- I am still recovering from the planes first "off runway landing" as I screwed up today and (a,) never set a high idle after takeoff, and (b,) slammed the throttle shut while on the smoke. I have noticed that the couple hundred rpm you will most likely lose from the smoke will transfer back to idle if you are abrupt with it- My assumption is that the smoke oil expands as it is injected into the muffler, and creates a bit of back pressure thereby reducing the overall rpm output- anyway, like the other bunny that I have, its a strong airframe and took the impact pretty good all things considered. just a touch of cosmetic damage, and the only structural damage was the right LG leg mounting plate in the fuse is fractured. all in all considering the wet weight of the plane (20+lb) It faired VERY well!
The first one always hurts.

Re: Wing Rock

Try the forward stab/elevator location. This is the reason for the forward stabs, it reduces/eliminates wing rocking in upright elevator.

TF

Muffler pics- Figured I'd just post how I cut it for the Bisson....