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Author Topic: FM-2 (Wildcat)  (Read 1189 times)
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Antonin Alfery
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« on: July 10, 2019, 08:20:43 AM »

Dimension of this type is limited by the length, wingspan is 213mm for this reason. Model is made of foam, fuselage is covered by Plyspan, wing and tail by microfilm. The camo will be three tone.

I have this type as rubber powered 1:20 outdoor scale with retractable undercarriage - it is a great, stable flyer. I hope this tiny version will be good flyer too - enlarged fin/rudder is significant improvement also for modeller purposes...
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FM-2 (Wildcat)
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« Reply #1 on: July 10, 2019, 09:07:12 AM »

Superb! Smiley
I would love to see some of your models flying again in the UK ... one day!
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yagua
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« Reply #2 on: July 10, 2019, 11:08:30 AM »

Is that a kit?
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OZPAF
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« Reply #3 on: July 10, 2019, 09:03:30 PM »

Antonin - that is a very nice moulded effort. Beautiful detail work. I also like the nice thin airfoil on the wing.

John
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Antonin Alfery
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« Reply #4 on: July 11, 2019, 12:30:29 AM »

Thank you for your comments.
FreeFlightModeller - For sure this will happen sooner or later, Nijmegen is a meeting point in the meantime...
Yagua - no, it is not a kit. Wing and tail are cut out by hot wire, fuselage is made from block
OZPAF - thin airfoil is required by Re number - especially for smooth (microfilm) surfaces. On the other hand microfilm increases rigidity of parts and there is also carbon leading edge (wing).
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duration
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« Reply #5 on: July 11, 2019, 07:02:34 AM »

Antonin,

Beautiful model! One question: you mentioned that the foam is covered with "microfilm". Is this the same material used on indoor duration models? (Film is made by pooring liquid on water surface, then lifting film off.) Or is it a ready-made plastic film?

Louis
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yagua
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« Reply #6 on: July 11, 2019, 07:24:06 AM »

Not a kit??? your skills are amazing!!!  Shocked Shocked
Plans and tutorial please!!!!! (is the kind of construction I´m aiming for  Grin)
it reminds me this japanese constructor http://www.hi-ho.ne.jp/a1takeda/free-f.html
PS: as much pictures and descriptions of the process as possible, please!!  Grin
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BG
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Me with F1B - epic retrieval (flew 10km after DT)


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« Reply #7 on: July 11, 2019, 11:50:30 AM »

Fantastic as always. I am curious to know how to adhere the microfilm to the foam?

Bernard
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F1B guy but its not my fault, Tony made me do it.
Antonin Alfery
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« Reply #8 on: July 12, 2019, 04:37:46 AM »

Yagua - foam models is quite complex topic... You can get some idea here:  http://www.minimakety.cz/forum/viewtopic.php?f=6&t=414   
It is related to bigger models and for sure language is a problem. But a lot of pictures could help.
This year - during two days contest in Brno held at the end of May ( http://www.minimakety.cz/dvacetinky/reports/2019/OPENSCALE_2019/index.php ) small workshop concerning foam models was organized and video taken - http://www.minimakety.cz/forum/viewtopic.php?f=6&t=854
Turn off the sound and move the start to the 13th minute - maybe you will find something interesting Smiley

Bernard, Louis - yes, it is really true microfilm used on duration models. Covering is not so easy to explain. I am preparing small frames only - one for each part to be covered. Wallpaper glue Metynal (Henkel) is applied onto the covered surface and attached to the film fixed in the frame. It is necessary to start from some edge - glue will "suck" the film without bubbles and wrinkles. It is necessary to trim part in the right moment - when wrinkles begin to appear in the corners. Parts have to be fixed for complete drying. It is not so difficult as it sounds but you will destroy some film for sure. I am using "green" microfilm. Fuselages could be covered by microfilm as well - but this one has to be thicker - transparent. Covering probably will be topic of the workshop next year.

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yagua
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« Reply #9 on: July 12, 2019, 10:52:18 AM »

thanks!! I´ll take a look  Grin Grin
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lincoln
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« Reply #10 on: July 12, 2019, 03:18:06 PM »

There are some kinds of foam which can be wet sanded to a very smooth finish. Here in the USA, Plazamate.and Highload 60 are examples. They're more resistant to dents as well.

I've seen a foam pistachio P-47 fly very well. It was similar to your model in many ways, though not quite as smooth or detailed.

Your model is really impressive.
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Antonin Alfery
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« Reply #11 on: July 13, 2019, 12:30:44 PM »

Lincoln - the trade name of the foam used is Ravaterm. It is possible to sand (dry) it to smooth finish too, but it is sensitive to dents as any other foam.
Problem of all kinds of foam is natural matt finish - not always appreciated in appearance (aerodynamics is another matter).

Some progress - Tamyia color.

Attached files Thumbnail(s):
Re: FM-2 (Wildcat)
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lincoln
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« Reply #12 on: July 16, 2019, 01:17:27 AM »

I think if you wet sanded the stuff I'm talking about, it would support a fairly glossy finish that wasn't very heavy. It's also harder to dent than other foams of about the same density. I suppose that doesn't help if you can't find any.
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Antonin Alfery
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« Reply #13 on: July 17, 2019, 08:56:08 AM »

Lincoln - you are right - I can find neither Plazamate nor Highload 60 here, but this info could be useful for other modellers.

Model is done, weight 4,2g with C.G. on L.E. now(without rubber) - I think final empty weight will not increase a lot.


Attached files Thumbnail(s):
Re: FM-2 (Wildcat)
Re: FM-2 (Wildcat)
Re: FM-2 (Wildcat)
Re: FM-2 (Wildcat)
Re: FM-2 (Wildcat)
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Skymon
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« Reply #14 on: July 17, 2019, 11:53:04 AM »

Stunning!

 Smiley
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RolandD6
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« Reply #15 on: July 17, 2019, 06:00:14 PM »

Stunning!

 Smiley

I will second that statement. Way beyond my clumsy capabilities.
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OZPAF
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« Reply #16 on: July 17, 2019, 08:18:18 PM »

What a masterful effort. Well done Antonin.

John
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3view
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« Reply #17 on: July 19, 2019, 02:34:47 AM »

Stunning little Wildcat. Thanks for sharing.
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Snaky Stringer
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« Reply #18 on: July 19, 2019, 04:22:39 AM »

Amazing. I remember seeing your foam P47 ( at Interscale I think, about twenty five years ago). This is really impressive.
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Tim Horne
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« Reply #19 on: July 19, 2019, 05:06:25 AM »

Superb! Will we be seeing it (and you of course) at Nijmegen this year?
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flydean1
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« Reply #20 on: July 19, 2019, 07:43:21 AM »

Always wondered  how you get them to fly with that huge prop.  OK for a duration model with lots of dihedral, but Pistachio Scale?  Incredible!  Aside from the prop, it looks like a full-sized Wildcat, fresh off the factory floor.
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lincoln
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« Reply #21 on: July 19, 2019, 03:30:35 PM »

Lincoln - you are right - I can find neither Plazamate nor Highload 60 here, but this info could be useful for other modellers.

Model is done, weight 4,2g with C.G. on L.E. now(without rubber) - I think final empty weight will not increase a lot.




You may well have something equivalent. It's used for insulating floors of walk-in refrigerators. Also under ice rinks. And a bunch of other places where insulation resists compression. For instance, Dow claims Highload (maybe the 100 rather than the 60?) is used under runways!

Your finished model is amazing.
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Squirrelnet
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« Reply #22 on: July 19, 2019, 03:40:00 PM »

Superb model Antonin. How you build to that detail at that size and at that weight is remarkable
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Antonin Alfery
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« Reply #23 on: July 20, 2019, 12:25:17 AM »

Thank you all for kind words

Snaky Stringer - There is a greater difference between the P-47 and the FM-2 than just those 25 years. And that is beautiful on modeling - we are still discovering something new...
Tim Horne - Yes, I would like to be in Nijmegen this year
flydean1 - It's a short-nose type, a bigger propeller probably won't be a problem (it is less than 50% of wingspan). Anyway - it is easier to reduce the propeller diameter than to increase it when necessary.
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yagua
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« Reply #24 on: July 29, 2019, 11:49:25 AM »

all I can do is repeat others words: Outstanding!!! Shocked Shocked Shocked
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