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BJCraft Episode

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Old 11-15-2011, 07:03 AM
  #26
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Default RE: BJCraft Episode

Man, If it were not for Dave having drawn up and kitting these awesome wings, I would have been begrudgiingly building my 11,000th set of foam wings and stabs. The weight savings is a great benefit and the jig really makes for a very straight wing. Most important to me is that I get to build a beautifully thought out wing. I love building at least as much as flying. I have missed it a lot these last several years. When I saw Jeff's Lightning and Dave Snows wings, I had to dive back in!










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Old 11-15-2011, 10:12 AM
  #27
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Default RE: BJCraft Episode

I agree completely. I am still considering buying an inexpensive router/laser cutting solution so I can play with different wing ideas. You can build a built-up wing much stiffer than a foam wing with a lot more 'options' available in planform and construction.
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Old 11-15-2011, 01:24 PM
  #28
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Default RE: BJCraft Episode

Quote:
ORIGINAL: Doug Cronkhite


Quote:
ORIGINAL: Ryan Smith
Correct me if I'm wrong, Doug.

My thought is that they are looking for a way to increase the wing area of the airplane. It has always been my understanding that winglets reduce the amount of vorticies present at the tips, making the outer 20% or so (I believe), more effective. Looking at the numbers, I think that they are making the wing smaller in area for both better snaps, and also because they are relying on the canalizer for a lifting surface. I would conclude that they are trying to increase effective wing area without actually adding it.
That's entirely possible Ryan. I know Christophe added the area from his canalizer into the total wing area on his Axiome, although there is some efficiency lost due to it being effectively a very asymmetric biplane.

What we REALLY need is for someone to tuft up a couple airplanes, and take a look at them in a real wind tunnel to see what's going on. I'm curious as to the effectiveness of CPLR's canalizer vs Naruke's fuselage strakes on his Asyuler External.

anyone have a CAD model... I can run it in CFD!!

I modelled up a Yak 55 in Pro/E and ran a series of simulations in a KE condition.. moved the tail up and down on the fuse... and sure enuff... with a High Tail, I got a low pressure on top (push to nose) and a low tail would cause a high pressure on top (pull to canopy) and I could put the tail where it was perfectly null... at least at a specific Beta ...

Interestingly ... with zero beta, and rudder deflected 45 degrees.... regardless of where the tail is located, there is a nose up tendency...

on another note....

Others have commented on efficiency... funny... the fuselages are fatties, and the current Design Du Jour is a high drag rudder.....
I don't think we need any more efficiency!! lol



Quote:
ORIGINAL: patternflyer1

..............I commend the designer of this airplane for thinking outside the box and trying something new. Without new ideas like this, there would be little advancement in designs. Does it work? I don't know, none of us do. Does it not work? We don't know that either. People are quick to speculate as to why things won't work though. In theory, I agree, this seems odd and theoretically, you all make sense to me.... Would love to have a plane I could chop us to try a bunch of different things on as Doug said.. Would be quite fun really.

Chris

Nice that he tried the winglets... (If in fact he has flown with them.. I dunno.,.. did he??)
But winglets are reasonably well understood... and as he has them shown will produce predictable consequences...

It is great that RC Models can evolve at a much more rapid pace than real aircraft!!! the turn around time is a couple orders of magnitude less as well as the financial risk being a fraction.. not to mention.. no human life at stake.....

But I bet the marketing department put those winglets on!!

lol
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Old 11-15-2011, 01:34 PM
  #29
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Default RE: BJCraft Episode

Quote:
ORIGINAL: Doug Cronkhite

I agree completely. I am still considering buying an inexpensive router/laser cutting solution so I can play with different wing ideas. You can build a built-up wing much stiffer than a foam wing with a lot more 'options' available in planform and construction.
I own a CNC machine (small one) and believe me, there is no 'inexpensive router/laser' solution. Talk about a money pit!!!

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Old 11-15-2011, 02:13 PM
  #30
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Default RE: BJCraft Episode


Quote:
ORIGINAL: woodie

Quote:
ORIGINAL: Doug Cronkhite

I agree completely. I am still considering buying an inexpensive router/laser cutting solution so I can play with different wing ideas. You can build a built-up wing much stiffer than a foam wing with a lot more 'options' available in planform and construction.
I own a CNC machine (small one) and believe me, there is no 'inexpensive router/laser' solution. Talk about a money pit!!!

Woodie

sure there is!!

lol

http://www.youtube.com/watch?v=pX1cO...eature=related

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Old 11-15-2011, 06:56 PM
  #31
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Default RE: BJCraft Episode

That's not bad fidelity, but the head is small and the material is soft.

The cheapest way I've found of CNCing parts is to not own the router. Be the nerd who does the 3D work, and know when the machine is idle, and slip bits in to get done every now an then
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Old 11-15-2011, 10:54 PM
  #32
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Default RE: BJCraft Episode

BJ get aerospace engineering degree in Korea and he has good skill on pattern flying,I compet with him in 2006 Asia cup and his flight was excellent
His design combine the knology of aeromechanics and Pattern fly experience,So I think that will be the key for success on BJ Plane.
The most important of all......BJ Craft product was not expensive.
We really need this kind of product,Good performance good quality with cheap price!!![sm=thumbs_up.gif]
Go BJ
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Old 11-16-2011, 06:15 AM
  #33
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Quote:
ORIGINAL: Rendegade

That's not bad fidelity, but the head is small and the material is soft.

The cheapest way I've found of CNCing parts is to not own the router. Be the nerd who does the 3D work, and know when the machine is idle, and slip bits in to get done every now an then
So that's why my friends show up from time to time and just happen to have something I could cut on my CNC machine to show them how it works. I should have figured that out earlier... DOH

Woodie
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Old 11-16-2011, 09:33 AM
  #34
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Default RE: BJCraft Episode

Hello,

It's possible to obtain a good router for a quite low price but you need (i) to have access to a mill and a lathe (ii) to find some salvaged materials and (iii) the most important... motivation .

Here is mine:


[youtube]http://www.youtube.com/watch?v=Vv-iV2ZrEAk&feature=player_embedded[/youtube]


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Old 12-05-2011, 04:49 PM
  #35
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Default RE: BJCraft Episode

Hi pattern flyers....! 

EPISODE wood working finish.

http://rcone.kr/board/index.html?id=bjair1&no=72


Have a nice pattern!....
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Old 12-05-2011, 05:49 PM
  #36
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Default RE: BJCraft Episode

This “EPISODE” starts test flies this week.
Designer BJ Park said “we want to talk together about new color scheme for Episode model".
Anyone have good color idea. please upload what is your idea.

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Old 12-05-2011, 06:49 PM
  #37
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Default RE: BJCraft Episode

Hey Alex
Go with a Red,Yellow, Black and Blue Scheme. will show up better in the sky.
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Old 12-05-2011, 07:00 PM
  #38
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Default RE: BJCraft Episode

Orange, white, yellow, purple, and silver. White and orange as the base colors and the others as accent colors,

Arch
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Old 12-06-2011, 01:17 AM
  #39
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Default RE: BJCraft Episode

After test fly with white color plane, BJ Park will try to make a coloring line work.

Anyway, how about silver (like metallic gray)?

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Old 12-06-2011, 06:26 AM
  #40
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Default RE: BJCraft Episode

The silver/metallic gray looks really nice. Just don't use a chrome color as it can blind you in the right attitudes.
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Old 12-06-2011, 09:04 AM
  #41
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Default RE: BJCraft Episode

The bottom of the wings/stabs in orange looks very visible.
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Old 12-06-2011, 09:26 AM
  #42
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Default RE: BJCraft Episode

Yellow base color with metallic purple (or metallic blue), red, silver trim. As for scheme, the Nuance scheme is pretty good. Go with red on the bottom wing with white or silver stripes for orientation. Stay away from a silver base color, it disappears in the overcast skies. I've flown a plane that was silver, long ago. Never again.

I like this yellow mid rex bipe scheme shown on the contra drive page.
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Old 12-06-2011, 07:46 PM
  #43
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Default RE: BJCraft Episode

Steve, Thanks for photo image

Anyone has other real good looking color images?

Color working is kind of hard…..

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Old 12-06-2011, 08:37 PM
  #44
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Default RE: BJCraft Episode

I found this full scale extra. I'm using the basic idea except changing the red to blue.

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Old 12-07-2011, 10:39 AM
  #45
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Default RE: BJCraft Episode

this doesn't look too bad....

lol

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Old 12-13-2011, 05:10 PM
  #46
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Default RE: BJCraft Episode

Did he ever consider to design a Bipe cause for what i see in quality and price I think he can do something affordable
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Old 12-30-2011, 12:13 PM
  #47
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Default RE: BJCraft Episode


Quote:
ORIGINAL: Haram

This “EPISODE” starts test flies this week.
Designer BJ Park said “we want to talk together about new color scheme for Episode model''.
Anyone have good color idea. please upload what is your idea.

Any update
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Old 01-10-2012, 08:37 AM
  #48
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Default RE: BJCraft Episode

Episode in Progress.....update
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Old 01-10-2012, 09:27 AM
  #49
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Quote:
ORIGINAL: Haram

Episode in Progress.....update
Nice...
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Old 02-09-2012, 01:20 PM
  #50
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Default RE: BJCraft Episode

very nice

not too concerned about the wing tips. They improve efficiency in lift but a wing is always lifting while its flying. You can bend those tips down if you like...


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