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Old Jan 19, 2015, 01:28 PM
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RickC_RCAV8R's Avatar
Canada, BC, Castlegar
Joined May 2014
530 Posts
Rant
Flat versus Curved ?

Gentlemen :

I have been constructing foamboard models for over a year now and have quite a few of them still around . The ULTIMATE biplane is my fave . Working in foam was a hobby saving transition for me due to the price for the materials . However :

Flat versus curved models is always a fight for me . I am looking for a set of plans for a Pfalz DIIIa or a SWOOSE seaplane to build up in foam . These models would be short changed if done in foam board as to their gorgeous designs . Since scratch building my V22 Ospreys (refer to my blog) , cutting multiple curved fuselage pieces is extremely easy to do and results in models that are rivalled by the foam injected 'factory' types . Flat foamies are alright for 'quick and dirty' builds and DO FLY , but their looks can be easily overlooked . There is something to be said for the more 'real looking' 3D curvy ones in my opinion . I personally loathe the profile types . Why more of 3D curvier type of designs are not posted here is a question that bugs me .

Anyway , that's my rant . Don't misunderstand me though ; "I LOVE foam ! " and will probably be scratch building the stuff until I croak .

Regards to all of the builders and flyers : RickC_RCAV8R
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Old Jan 19, 2015, 01:49 PM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
14,408 Posts
Armin wing section ?, even the KFm section can't really be called a flat plate.

Just build bigger a do a 'built up' foam wing, selecting whatever airfoil section you want to try.
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Old Jan 19, 2015, 02:28 PM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
3,574 Posts
Quote:
Originally Posted by RickC_RCAV8R View Post
Gentlemen :

I have been constructing foamboard models for over a year now and have quite a few of them still around . The ULTIMATE biplane is my fave . Working in foam was a hobby saving transition for me due to the price for the materials . However :

Flat versus curved models is always a fight for me . I am looking for a set of plans for a Pfalz DIIIa or a SWOOSE seaplane to build up in foam . These models would be short changed if done in foam board as to their gorgeous designs . Since scratch building my V22 Ospreys (refer to my blog) , cutting multiple curved fuselage pieces is extremely easy to do and results in models that are rivalled by the foam injected 'factory' types . Flat foamies are alright for 'quick and dirty' builds and DO FLY , but their looks can be easily overlooked . There is something to be said for the more 'real looking' 3D curvy ones in my opinion . I personally loathe the profile types . Why more of 3D curvier type of designs are not posted here is a question that bugs me .

Anyway , that's my rant . Don't misunderstand me though ; "I LOVE foam ! " and will probably be scratch building the stuff until I croak .

Regards to all of the builders and flyers : RickC_RCAV8R
It's all a matter of whether or not the looks matter to you . For me , I don't care if a plane is airfoil or flat wing , as long as it FLIES beautifully !

Here is one of the most beautiful flights I've seen - with completely flat wings !

F3P demo in Leipzig by Donatas Pauzuolis (6 min 55 sec)
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Old Jan 19, 2015, 03:16 PM
Registered User
Staffs, UK
Joined Nov 2003
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I suppose to some extent it depends if you build models to look at or to fly. Being brought up on C/L models profile fuselages are second nature to me (and fly perfectly well). But that's for sports models.

If you think you're building a scale model then it has to have a fuselage the right shape or it's at best a crude cartoon. A Pfalz or for that matter a Spitfire just looks completely stupid as a profile model with all the bits hanging in the wind and slab-sided ones aren't much better. But if you haven't seen quite a few proper shaped foamies around you've just not been looking hard enough. There are plenty out there.

Steve
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Old Jan 19, 2015, 06:09 PM
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birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
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LOCKEY or Perth AU does an excellent job of bending all the bits necessary
on his foamys .
If you have the patience to build rounded foamys then he has some nice choices.

Re airfoils:
I used to be religious about foils sections and still "believe" when used on the heavier scale models.
IMHO , Foamys for fun only need to sport flat foils.
With the power to weight ratios that we have at our disposal
I have lost my Airfoil Religion
especially when it comes to the more disposable foamy designs.
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Old Jan 19, 2015, 08:05 PM
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RickC_RCAV8R's Avatar
Canada, BC, Castlegar
Joined May 2014
530 Posts
The Donatas video above is incredible ! Defying gravity most of the flight . I'm stumped .

Perhaps my lack of skills with the proper bending of the foamboard to make airfoils is the frustration demonstrated in this rant . I have the multi-curved fuselage work nailed though .

THe wing technique shown is one that I have used before . I like it as it flies really nice .

Thanx guys .
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Old Jan 19, 2015, 08:19 PM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
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Quote:
Originally Posted by RickC_RCAV8R View Post
The Donatas video above is incredible ! Defying gravity most of the flight . I'm stumped .
Thanx guys .
EXTREMELY light wing loading ! Did you notice the coaxial motor/props ? The motor is parallel to ( but out in front of ) the pitch axis , so no torque roll - maybe just a little torque pitch ?

Al
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Old Jan 19, 2015, 11:24 PM
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Canada, BC, Castlegar
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BOC :

Yes , I caught the coaxials right away . What caught my eye later on were the presence of the clear triangular constructs on the wings . Spoilers of some type , I wager . An amazing design that I would love to try out . F3A type flying used to be my thing . Flying those patterns with a bird like this would be a dream come true for me . Can't get over the lack of speed and downward momentum exhibited .

How is the weather at the coast ? Lotsa snow here . (North of Spokane over the border)
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Old Jan 20, 2015, 12:19 AM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
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Quote:
Originally Posted by RickC_RCAV8R View Post
BOC :

Yes , I caught the coaxials right away . What caught my eye later on were the presence of the clear triangular constructs on the wings . Spoilers of some type , I wager . An amazing design that I would love to try out . F3A type flying used to be my thing . Flying those patterns with a bird like this would be a dream come true for me . Can't get over the lack of speed and downward momentum exhibited .

How is the weather at the coast ? Lotsa snow here . (North of Spokane over the border)
I'm no expert , but I believe the wing triangles act as drag brakes to maintain the slow constant speed when the plane is going straight down . I'm MESMERIZED by that type of flying !

Rain , rain and more rain here - makes everything green and pretty , though ! Freshly fallen snow is also really beautiful - had plenty when we spent some time in Moscow , Idaho , south of Spokane .

Al
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