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Feb 19, 2013, 12:47 AM
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slebetman's Avatar
Quote:
Originally Posted by Jimmy JFlyer
Excited to see the bump!
Thx for the update. I'm dieing to see how this next guy turns out.
So if I may ask, when you get a free moment, (i know this is hard to come buy these days, believe me I do) how would you describe why you prefer your bearing vs the pigtail?
It's probably just me but I found adjusting thrust line to be easier with my bearing since it has only a single wire to bend. The pigtail bearing requires two changes per adjustment: first adjust the thrust line then adjust the pigtail.

It's not much of an issue if you don't change the thrust line much but since my planes tend to be my own design I usually don't have any reference how much down and right thrust is needed for each design. Maybe in a years' time with experience I can get it 90% correct right off the building board but I'm not there yet.

Obviously, if you're building based on a plan you just need to set your thrust line as per the plan. So for most people the pig tail bearing should work just fine. Not to mention that it's a bit easier to build compared to my L shaped bearing.
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Feb 19, 2013, 03:10 AM
TheyreComingToTakeMeAway!
derk's Avatar
adjusting a pig tail is easy if you used glue that can be reset with a touch of solvent
Jun 29, 2013, 12:09 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Bump!
Been a while. I finally have a Butterfly kit and also an Uncle Sam, (Boxy Bipe). Just today went out and got the nec items for building. Really excited to give stick & tissue a go. Looked back through the pics on this thread for reference on things.
So I always think back to this guy and wonder how it turned out. Hope you are still monitoring this thread. Is this latest build flying?

Jimmy
Jun 29, 2013, 02:12 PM
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slebetman's Avatar
Quote:
Originally Posted by Jimmy JFlyer
Bump!
Been a while. I finally have a Butterfly kit and also an Uncle Sam, (Boxy Bipe). Just today went out and got the nec items for building. Really excited to give stick & tissue a go. Looked back through the pics on this thread for reference on things.
So I always think back to this guy and wonder how it turned out. Hope you are still monitoring this thread. Is this latest build flying?

Jimmy
I lost the latest build. Managed to get it stuck to the rafters of the lobby of my office building . That's part of the reason why there haven't been any updates - I don't have a plane to measure to update the plans with.

Another reason is that I haven't flown free flight for more than a month now. In fact, I'm just back from my first free flight session since April.

Glad to hear you've got your Butterfly. Have you built it yet? Start a build thread on it!
Jun 29, 2013, 09:13 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Heinz, thanks for those links. I really love the little mini-stick at .8 g's you have posted just above the Junior post.
I noticed that post was in English and it looks as though you are offering this as a kit?
Did you modify the Junior kit to a unit that disassembles? Or does Ikara sell it that way?

SLEBETMAN!!! Glad you are still here.
Sorry to hear about the plane's loss. I sure was anxious to hear how it did. Did it fly as expected? And are the latest version of the plans good enough to your liking?

Yes I got my Ikara Butterfly! Woo Hoo. I got it from Cosmic Flyer, aka Mandy from Flighthook. Their E-bay store has a lot of nice stuff. I will be referencing them in my build log. Yes I am going to do a build thread. Both here and over at Hip Pocket Aeronautics. It will be a slow go at it though. I have zero free time these days and will probably just get baby steps at a time done. As a matter of fact I think I will start tonight. Going to build what is quickest and do maybe just the vert stab. Just to get my feet wet before attempting my first wing.

Do you think you will have another go at the Portable Plane?

edit... just took a shot at the tail feathers. Surprised how easy it was with the right stuff. First ever stick & tissue! lol Took about just over an hour to get set up & those 2 pieces cut, pre soaked lined up and then glued & pinned down. I took a bunch of pictures too for the thread. Maybe get it started over the next couple days. I'll post a couple pics tomorrow. Time for bed.
This is cool stuff! I think I have found another addiction...
Last edited by Jimmy JFlyer; Jun 29, 2013 at 11:21 PM.
Jun 30, 2013, 03:08 AM
F1B is ok.
Jimmy, no, I do not sell these kits. The Ikara kit I have taken as the basis for the construction of the model. Here is a link in english.

http://www.hippocketaeronautics.com/...=5118.msg44506 # msg44506

Heinz
Jun 30, 2013, 08:49 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Thanks for the link Heinz.
Slebetman and Heinz, I am seeing that the Junior has a flat wing vs the Butterfly that has the airfoil shape. Both of you guys have flat wings on your creations. Is there a major difference in how they fly between flat and airfoiled wings at this size?
Jun 30, 2013, 09:08 AM
F1B is ok.
There is no significant difference in performance. The flat bottom has been chosen to newcomers to facilitate the construction. Build the butterfly as it is provided in the kit. Use for covering a glue-stik.

Heinz
Jun 30, 2013, 09:21 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Thanks for the info Heinz. I planned to do that. I am building exactly how it is planned. I also got the glue stick for the covering too.
Jun 30, 2013, 10:05 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Just a heads up, started a build thread...
Sure am having fun with this.
https://www.rcgroups.com/forums/show....php?t=1923324
Jul 02, 2013, 10:49 PM
Registered User
slebetman's Avatar
First I'd like to apologize to Jimmy JFlyer that this is yet another reason for my neglect of the Portable. On the bright side, I'm building again!

Here's my attempt at an A6 class plane. Similar style to the Portable only it can't be dismantled since I'm aiming for minimum weight. To exploit the rules and lower wing loading as much as possible I made it a tandem wing. I'm going to call it the Dragonfly.

I'm currently using illegal covering (my favorite vege bag plastic) but I'll replace it with condenser paper.

Here's the 2013 AMA rules for A6 class:

26.1. General. Except for the specific rules which apply directly to A-6, the rules for Free Flight Indoor Rubber, Hand Launched Stick model shall apply.
26.2. The model shall be rubber powered and covered with paper.
26.3. The total maxim projected wing area shall be 30 square inches. There is no restriction on the stabilizer area.
26.4. All wing, stabilizer and rudder wood including wing posts shall be 1/16 square wood minimum, except ribs shall be 1/32 X 1/16 minimum. Posts may be rounded in the area of the mounting tubes.
26.5. The motor stick shall be from solid wood of 6 maximum length measured from the front thrust bearing face to the front of the rear hook.
26.6. The propeller shall be 6 maximum diameter with flat blades from balsa no thinner than 1/32.
26.7. The minimum weight of the model shall be 1.2 grams without rubber motor.
26.8. No special materials such as boron, carbon fiber or foam are to be used.

Interestingly, the Portable actually qualifies as an A6 according to the rules.
Apr 13, 2017, 04:30 PM
Registered User
Sorry to revive this old post.
I do not understand how to do the wing wash ... could you explain? I understand that it is so the airplane does not spiral---- but I do not know how to do it ---thanks
Apr 20, 2017, 10:00 PM
Registered User
slebetman's Avatar
Quote:
Originally Posted by aguila2000
Sorry to revive this old post.
I do not understand how to do the wing wash ... could you explain? I understand that it is so the airplane does not spiral---- but I do not know how to do it ---thanks
There are a few ways to do the wash.

The most common way is to lift one corner of the wing when gluing it together. The way that works is to glue all the ribs first then the outer wing tips and then when the glue is dry lift one corner carefully and put something under it (maybe an eraser or small block of scrap balsa) and then glue the root. When the glue dries the wing will be washed out or in (depending on which corner you lift).

Another way is to build the wing normally and then add wash when you glue the wing to the supports. Or if you want to make the wing removable glue one of the mounting tubes at an angle so the wing will warp when you mount it to the supports.

Yet another way is to glue one support on the left of the fuselage and the other to the right of the fuselage. I've seen several people do this to add washin and washout to the wings but I've never managed to make it work.
Apr 20, 2017, 10:07 PM
Registered User
slebetman's Avatar
Quote:
Originally Posted by aguila2000
Sorry to revive this old post.
I do not understand how to do the wing wash ... could you explain? I understand that it is so the airplane does not spiral---- but I do not know how to do it ---thanks
Sorry, didn't realize this was the portable plane thread.

Just follow the gluing instructions in the plans from this post: https://www.rcgroups.com/forums/show...1&postcount=38

The difference in angle between the two supports will add the wash automatically.

Note that in the plans you are looking at the wing posts from head on. Not from the rear. So the left of the wing posts is for the right wing and the right of the wing posts is for the left wing.


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