Thanks Arch.
We are expecting a few warmer days around Thanksgiving and hope to get it in the air!

I had a chance to try out the Mejzlik 20x13 EL 3 blade this weekend. I was pretty impressed overall. It had a slower downline (downlines were already pretty good) and a very constant speed. I will continue to fly it and compare it with the Falcon 21x13.5 2 blade I was running. The weight of the prop is very similar to the Falcon, maybe 10g heavier.

My impression is that it rolls slightly better with the 3 blade and feels even more solid in flight. I did notice that I tended to burn more power per flight because I was trying to fly at the same speed as the 2 blade. I will need to adjust to the slower pace and then the power should be comparable to slightly higher than the 2 blade.

We had some fairly windy conditions yesterday so I was able to see how it handled the wind. It did great.

More to come on this.

Steve

Hi,

corresponding the fixing of the top wing on the pylon:

Has anyone found an other way as BJ suggested ? I really would like to fix the top wing with 2 srews.

Also it would be good if the top wing would be not able to move on the pylon during building together the airplane for flying.


Regards

PW

That was one of the main reasons why I had decided ti skip BiSide, probably I am wrong but lets see how it will be after few years of usage.

Last week I was lucky enough to stumble upon an used Oxai Amethyst in relatively good condition, now laying happily on my shelf. Hope not to be again criticized by Doug .

Velco

Hi Velco,

it is no critzision; but perhaps someone has an other good idea ?


Regards

PW

It is a bit difficult, but it gets easier the more you do it. I have a pretty good method which goes quickly. I set the top wing on the pylon with the center bolt protruding several mm. Then I locate the hole in the pylon with the bolt and get it started in the blind nut. Then I seat the wing into the cabane struts and partially tighten the cabane bolts. Then tighten the center bolt and then the cabane bolts. The hardest part is locating the pylon bolt hole. I marked the hole location on the pylon so I can see it from the side as I put the win on. It makes it a lot easier to line up the bolt with the hole.

Keep in mind BJ has over 500 flights on the prototype with no issues. I don't think there is a need for a second bolt in the cabane.

Hahahaha.. It wasn't criticism. Just an observation. I go through the same problem with computer components on a regular basis.

JR Varela made a fillet on the "company plane" that is on the center pylon. The ply spacers sit in a groove in that fillet. Makes it easy to align and doesn't allow the wing to pivot. I plan on doing that on mine as well. Very slick and makes putting the top wing on very easy.

Arch

Hi Shannah;

correct: to find the hole on the pylon to fix the M3 srew is tricky.

Arch:

Do you have a foto from this methode of JR Varela ?

Regards

PW


- special thank´s to Doug and Shannah from germay; hope to see you at IMAC 2014 in Spetember at Wayne

I'll be there Peter for sure.

PW what I did to the Biside is, I use some petroleum jelly on part that I didn't want to be stuck and used some wax paper on the buttom of the top wing . I put the wing on where they belong . I mixed up some 30min epoxy with some microballoom force some of the mix around the gap filling the open between buttom of top wing and the fusage. Once it set up it will keep the wing from rocking sideways, since it spread the area that the wing sit on. Beware make sure you coat anything you don't want to be glued with the petroleum jelly or something that act as a release agent..

Jr Varela

Could you please show us a photo? Sounds good

I'll get some photos tomorrow.

Arch

Tks

Hey Guys,
Spent a fantastic afternoon at the field today. I can't say enough about the combination of the Mejzlik 20x13 EL 3-blade and the Bi Side. I flew it it windy conditions on Thursday afternoon and today in mild conditions. It has a really nice pace and is extremely smooth. I Love it.

I feel that this is a fantastic airframe and with the constant speed and great stability it is really enjoyable to fly. I do believe that the rolling is better with the 20" 3 blade.

It flies the F15 sequence with authority. I flew F15 (thanks to the calling help from Randy) for the first time all the way through this afternoon and feel that it will be a good platform for this sequence. It does the rolling loop segments very easily, snaps great, and really plants itself on exiting corners and completing roll segments.

It's not often that I feel as connected to an aircraft as this one. So I'm loving every minute of it.

I'll keep working it and will let you know the progress.

I know what you mean, Steve. I got that connected feeling right away on mine as well. I'm really surprised you haven't felt a need for more right thrust with the 3-blade prop. Every time I used a 3-blade on my IMAC airplanes, more right thrust was definitely needed.

Hi Doug,
Yes, I am also a bit surprised that I didn't have to adjust the thrust. I know that on my IMAC planes I had to really increase right thrust and down thrust. I was almost going to pre-adjust the thrust before I flew it the first time but decided to just give it a try. I can't figure out why I didn't need to change thrust, perhaps I had too much to begin with and was just compensating for it in flight. I am going to watch it very carefully to see if it is off slightly. I will also turn off all mixes and see if there is any noticeable difference.

Perhaps one factor is that yesterday I was staying off the throttle a lot more than before. I was trying to match the horizontal and vertical speed with the downline speed. Since this has such great downline braking it is much slower than with the 2 blade. I wasn't going anywhere near full throttle on uplines. I didn't notice any yaw on uplines, but I should probably do more full throttle long vertical uplines to verify things.

Hi Doug,

I'm assuming thats a custom scheme you had the guys at BJ make up for you.
If so, is it just for you or can it be ordered from them?
Its truly spectacular!

Dave

BJ will do any scheme custom. There is an additional cost, but they will do it.

Arch

Hi,
I am just an average RC pilot but enjoy F3A flying. I really like the look of this plane.
Do you think a Hacker A60 7S - 215KV will fly this plane well with good power? I have one lying around.

Thanks.
Paphman

Here is the fillet JR made. Not a great picture, but couldn't figure out how to take a better one. You will notice that it isn't symmetrical. The other half stuck to the wing when he made it. It's not a bad thing though as it makes it almost keyed, so it goes together even easier.

Arch

Dave, that's my own custom scheme. I sent them drawings of what I wanted and they duplicated it for me. I don't see why BJ couldn't do that scheme for someone else if they wanted it. Never hurts to ask him! You can email him at [email protected]

It would work. You'd have to be creative with the mounting, much like Doug was with his Fury. The BiSides are coming in very light. May not quite have the pull of the Q80 or Pletty, but should be plenty.

Arch

It should fly it just fine. Mounting with a rear mount takes some planning but isn't hard.