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Mar 06, 2009, 07:29 AM
Ken's CAD Models
dz1sfb's Avatar
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**SEMFF WWII combat planes 35 designs with plans and video**

These models are the result of the desire to produce low cost, great looking models suitable for combat.

The following list are the design paremeters;[LIST=1][*]Profile WWII 3 channel RET or AET design from PBIII or Owens Corning Foamular material. Now Model Plane Foam![*]Wing area limited to 150 sq. in. with a KFm2 airfoil.[*]Blue Wonder 1700Kv 24g outrunner motor or its equivalent.[*]An optional motor to consider is a 2208-12 1800Kv motor or its equivalent. This motor is better suited to the short nosed long tail moment models like the BF-109 or the Spitfire where attaining the correct CoG is only possible with additional ballast.[*]2 - 9g servos. The HXT brand are very good units, or the Hobby King 10g analogs work well and are low cost.[*]10-15A ESC is more than sufficient for any task in these planes.[*]The battery needed for combat flying is a 800 - 900 mAh 2s unit. I cat attest to the Turnigy Nanotech 850 mAh units.[*]Recommended prop for this set up is either a GWS 7x6 or an APC 7x6E . The main idea here is to stay within a factor rule of 42 or less (that is the diameter x pitch in inches).[*]Total cost would be under $30 excluding esc rx.

Update 14-MAR-2012 - New foam available from Check it out!

Update 29-MAR-2013 - Kits of these models are now up on my website at

Link to SketchUp template file that I use to create these designs. Maybe you can also

These can easily be designed in Sketchup and scaled to get the wing area within spec. With the many 3 view images and color schemes available should be pretty easy to produce nice looking low cost models for this kind of activity.

This may have already been done, but thought I would pitch it to my buds here.

Edit 30-MAR-2010: All up weight came our just under 7 oz at 197g. That is right close to 150 watts per lb. as the BW motor with a 7x6 SF prop puts out 65 watts. We could call it the 150 cubed rule.

Edit 01-JAN-2011: Added a pictorial build guide for the VLF style builds here


Adding a most recent build photo to highlight the excellent and original work of the subscribers to this thread. It will change as folks submit pictures of their work.
See more pictures of crmodels P-51 and zero.

P-64 plans and video are here
Hawker Sea Fury plans here
Mitsubishi A6M Zero plans here
F8F Bearcat plans here
FW-190 plans here
BF-109 Ver. 3 plans here
F4F Wildcat plans here
P-51D Mustang plans here
Mig 3 plans here
P-51B Mustang plans here
Spitfire plans here
F6F Hellcat plans here
DH Mosquito plans here
Hawker Hurricane plans here
P-47B Thunderbolt plans here
P-39 Airacobra plans here
P-40F Warhawk plans here
SBD Dauntless plans here
FW-190 VLF Style
F6F Hellcat VLF Style
Brewster F2A Buffalo
A6M-5 Zero VLF V4 Style
Chance Vought F4U Corsair VLF Style
Polikarpov i-16 Mosca PLF Style
TBM Avenger VLF Style
F8F Bearcat VLF Style
Yak 3U VLF Style
Yak 3 VLF Style
Me-163 Komet PLF Style
Republic P-47D VLF Style
Mitsubishi J2M3 Raiden PLF Style
Grumman F4F Wildcat VLF Style
CA-12 Boomerang VLF Style
Hawker Sea Fury VLF Style
Last edited by dz1sfb; Mar 07, 2019 at 09:28 PM. Reason: New feature plane
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Mar 06, 2009, 07:40 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar

ahh more great fun planes to build!

Great idea Ken!
hrmmm, which bird to do first?

Ok RCGroups, I expect a full page of PDF's by dinner time this evening

Mar 06, 2009, 08:50 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP

Other designers contributions to this thread.

The intention of this thread is not a build thread per se, but a showcase/repository of designs meeting the above mentioned criteria.


In no particular order;

Curtiss SB2C Helldiver by Wilsonman
Last edited by dz1sfb; Apr 02, 2013 at 10:05 AM.
Mar 06, 2009, 08:53 AM
Bush Pilot
Sailor Jerry's Avatar
How about these?
Mar 06, 2009, 08:55 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
ahhh, well I am very interested to see what everyone has been building thats for sure. This should be very neat indeed.

Mar 06, 2009, 08:56 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Originally Posted by Sailor Jerry
Yeah I surf that thread all the time. Now lets see what peeps have that fits Ken's criteria above.
Mar 06, 2009, 09:07 AM
Registered User
rcdadx2's Avatar
Hey Ken,

This sounds like a LOT of FUN !!!
You can count me in. Im sure this could catch on big time.

Kamikaze !!! CHOP Chop Suey !!! lol....vince
Mar 06, 2009, 09:16 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP

Differences from the Printed Warbirds

I have seen the Printed Warbirds thread, but have not looked at it in detail. Many would probably work. I will look at them some more. Any idea what the wing area has been on these?


Edit: Okay breezed through a few posts there, and that is pretty much the concept, with the exception of size and carbon fiber. That is why I am limiting wing area to 150 sq. in.'s. Adding CF automatically adds $5 to the cost. Fiber strapping tape will be plenty sufficient if required.
Last edited by dz1sfb; Mar 06, 2009 at 09:28 AM. Reason: More info
Mar 06, 2009, 09:26 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
I wanna say all different size's. If memory serve's, seems to focus on taking 3 views & making profile foamies from that in general and alot of decorative printable overlays. Not a specific size. I could be wrong though. Been a while since I surfed over there.

Mar 06, 2009, 01:41 PM
Ken's CAD Models
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Someone actually has kitted models in this size

This is budget RC's website. They produce models in the proportions that I am talking about here.

Here is a RCGroups review on this product. You can see by the spec's that it is just over the 150 sq. in. design criteria.

I was at the Propshop at lunchtime today and looked at these models. They are laser cut 1.9# EPP with all the plywood and CF components to make a complete model. All in all these are very nice kits at a very reasonable price ($35). They are AET aircraft.

But we are really on the cheap here and know that we can have this RTF for about that money. Plus it is just plane fun to design your own model.

Mar 06, 2009, 04:21 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Yeah I looked at those very same ones & you are right, it is much more fun doing them yourself.

I would much rather spend that money on Don's motors & the other items needed like servo's & build their 35.00 kit out of 3.00 in foam and dowels.


Edit: Oh and don't even get me started on the Prop Shop! I could spend my whole day AND paycheck in that place.
Mar 09, 2009, 10:02 AM
Ken's CAD Models
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Thread OP
Greetings today!

Like I said, this idea is not new. Found Gene Bond's Blu-51cd Simple Fun Fighter.

This gets very near what I am trying to do hear. He has 2 versions, one is 200 sq. in's and the other is 130 sq in. wing area. 30" wing span compared to 24" wingspan.

I believe that the 150 sq. in. rule would really be an optimum size for the C20. Shooting for good vertical performance with light wing loading.

Last edited by dz1sfb; Mar 09, 2009 at 10:08 AM.
Mar 09, 2009, 10:43 AM
For us He died, in me He lives
Jimmy JFlyer's Avatar
yeah I have the foam cut out for the 30" sitting at home. Then started the T1 & finished the BB30. Also built the SF & Shark Bait. Haven't picked up the Stang again yet, but once I have an inventory of enough electrics I'll get back to her.
Mar 09, 2009, 10:48 AM
D'oh.. Dumb Left Thumb
dekan's Avatar
Ken, I looked at the BugetR/C web page... I'm interested...But with the UK currency now getting lower and lower against the dollar..I won't be ordering a kit any time soon..

I have an Ele C20 or two I'm interested in something about 24"WS...
Mar 09, 2009, 11:58 AM
Ken's CAD Models
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Thread OP
Hi Dekan,

With the 150 sq. in. parameter, they will vary by design depending on the aspect ratio. They should all fall somewhere in the 24"-28" ws range.

The C20 is like the Cox Babe .049 of the brushless world. Versatile, powerful, and cheap. I like'm.

As far as the Budget RC planes. Very nice high quality kits at a very good price. However, I like to do this as cheap as possible, as this is supposed to be discretionary income, and we are having less of that these days.

Do you have a design that you are going to do, or would like to see done?

I am looking at the P-64 which put most simply was a single seat fighter version of the AT-6, SNJ, Harvard aircraft for export. Neat story of this aircraft on wikipedia.

I am thinking that in order to keep it simple and strong that I will move the wing up to the thrust centerline and the horizontal stab down to the same.

Inviting thoughts,

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