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1/12th Scale Combat...what engine to use?

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1/12th Scale Combat...what engine to use?

Old 01-02-2014, 03:47 PM
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Bob Paris
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Default 1/12th Scale Combat...what engine to use?

Hi Guys,
Our club is just starting out to begin a Scale 1/12th combat group. I'm just beginning to build a Pica F-82 1/12th. for use and wonder what make of .15's I should use. I've two each of K&B .18's, Fox .15's latest version with Perry carbs and Magnum XL .15's to play with.

What engine to use...? Any suggestions would be most happily accepted... : )

Aloha and Happy New Year,
Bobby of Maui
Old 01-02-2014, 05:33 PM
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BadDawg
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I don't know the engines you have. All of my combat planes are 25's. A few things for you to think about in making your choice. You get more cuts yanking and banking, so if the engines are fairly close on the high end the one with the most torque is the better way to go. An opponent might have 1500 more revs than you, but if he bleeds off all his speed in the turns he's meat. Since it's your club's first combat outing, dependable is a good thing. And maybe most important, Cheap. There are more mid-airs and lawn darts in combat than in any other RC flying i've ever seen. Have fun. It's a rush.
Old 01-03-2014, 11:06 PM
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sarpet
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Os .15la os.15cva irvine.21 k&b.21 os.25fx
Itry sc, asp, magnum, ph, .15 bluehead and squarehead.25 and idont like.
La and cva revs on ground 15000rpm with apc 8x4 but cva much more in the air, my tuned cva revs 16200rpm ground with apc 8x4 15% nitro, standart muffler.
Aces rules http://www.aces-headquarter.de/40385.html

Last edited by särpet; 01-03-2014 at 11:10 PM.
Old 01-08-2014, 07:28 AM
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draftman1
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the magnum 15XLS has been a really good engine, the OS 15cva's would probably be the best, there a hot engine.

glad t see some scale combat getting started
Old 01-08-2014, 11:15 AM
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j.duncker
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I used an OS 15 CVA. and the MVVS 20 with the mini pipe on the larger models. I liked being the fastest kid on the block.
Old 01-11-2014, 06:49 AM
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Hi Bobby,

Which pair is easiest to put a remote needle valve on ?

All good combat engines get them eventually ! ! !

The Magnum XL.15s are dependable runners. They won't keep up with a single engined O.S.FX.25 though.
We now allow twins to use .25s.... It is Awesome ! ! !

Our 'Stock' Power is the O.S.FX.25 and the just as great Magnum XLS.25.

Single seat Fighters that flew operationally in WW2 is our goal. (Any twin is encouraged !)
Around 44in span seems average.
Any 'oddballs' are allowed, if, they are 'scaled up or down' from 1/12th. To match our 'average' performance.

80% are coro constructed from the basic design of the Dave West Mig-7. Durable and repairable !

It is fun. Combat is like Pylon Racing, without the Pylons ! ! !

Think Q-500 meets Scale...

We are having a laugh, keeping the 'playing field' level...
And knowing 'Luck' and/or Pilot Skill...Wins ! ! !

The RCCA Safety Rules are flawless... Highly Recommended ! ! !

All it takes is two combat planes,
To get the 'snowball' rolling...


Take care,
Have fun,
Dave'crosscheck'Fallowfield
Maac 6437
Unabashed Combat Team
Old 01-30-2014, 07:20 PM
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Bob Paris
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Hi Guys,
I built a GP 1/12th Spitfire...the only ARF or Kit I could find for 2548 combat. I installed a T.T..28 XLS on the airframe and have run up the engine. After six ground runs, I'm getting 12,000 ~ 12,400 rpm, on 15% Helicopter fuel with 20% oil, driving a Xoar 10x4 wood prop.

The engine is inverted and I installed a Mac pipe. The models weight came out to 2 lbs. 14 oz. ready to fly, with a 5 cell 1300ma NiCad (NoBS Batteries). I've not been able to maiden the Spitfire, because of all the rain and high winds we have had for the past couple of weeks. She is ready to fly and I'm bitten at the bit to fly her and se how she performs. I installed a steerable tail wheel on my Spitfire and I will be able to taxi the model. My Magnum has a really sweet idle.

I'm currently building a Pica 1/12th F82 and have a P-38 kit to build too. My F82 will probably get the two Magnum .15 XLS engines I do have on hand and I'm using 8 mini Airtronics 94091 servo's with a five cell nickel battery. I may start a full build of the kit here at RCU. I would have loved to have two OS .15 CVA's, but I was not able to find any for sale. So I went with the Magnums.

I'm looking for any Great Plane 1/12th ARF's or any Pica kit model.

Soft Landings Always,
Bobby of Maui
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Last edited by Bob Paris; 03-08-2014 at 06:53 PM.
Old 01-31-2014, 07:12 AM
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j.duncker
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Originally Posted by Bob Paris View Post
Hi Guys,
I built a GP 1/12th Spitfire...the only ARF or Kit I could find for 2548 combat. I installed a Magnum .28 XLS on the airframe and have run up the engine. After six ground runs, I'm getting 12,000 ~ 12,400 rpm, on 15% Helicopter fuel with 20% oil, driving a Xoar 10x4 wood prop.

The engine is inverted and I installed a Mac pipe. The models weight came out to 2 lbs. 14 oz. ready to fly, with a 5 cell 1300ma NiCad (NoBS Batteries). I've not been able to maiden the Spitfire, because of all the rain and high winds we have had for the past couple of weeks. She is ready to fly and I'm bitten at the bit to fly her and se how she performs. I installed a steerable tail wheel on my Spitfire and I will be able to taxi the model. My Magnum has a really sweet idle.

I'm currently building a Pica 1/12th F82 and have a P-38 kit to build too. My F82 will probably get the two Magnum .15 XLS engines I do have on hand and I'm using 8 mini Airtronics 94091 servo's with a five cell nickel battery. I may start a full build of the kit here at RCU. I would have loved to have two OS .15 CVA's, but I was not able to find any for sale. So I went with the Magnums.

I'm looking for any Great Plane 1/12th ARF's or any Pica kit model.

Soft Landings Always,
Bobby of Maui
Are sure it is 12th scale? a 12th scale Spit with a 28 at 2lbs 14 oz ! BEST OF LUCK at getting that to fly. Keep the airspeed up and don't pull much G in turns. You have a lead balloon.

Mine had a good 15 turning a 7x5 at 17000rpm with no wheels and were at the min weight of 25 oz or 700 g.

The Supermarine Spiteful is a better 15 size combat model as it is less likely to tip stall. It is also an easier wing to build in foam as it is a straight taper wing. Stretch it 10 % too leave the fuz standard.

For 20 size models I like the TA 152. Most cuts are wing cuts so having a 48 inch wing is better than a 36 inch one.

If you are serious about combat learn to cut your own foam and build from urethane foam with brown paper covering. All of this is well documented. Cheap quick and easy to repair.
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Old 01-31-2014, 03:54 PM
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He should be ok. I have a Coroplast spit from a JohnnyG CNC kit and it is 3lb with OS25. I am work on my first Foam combat plane and right now Coro might be a easier build route.
Old 02-18-2014, 09:50 PM
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Bob Paris
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Hi Guys,
My first flight was a real pleasure. The TT .28 hauled that model very well, and quite fast. I was using a Xoar 10x4 wood prop-balanced and this prop is legal with our club. It hauled butt... : ) and very surprised at the maneuverability of the model. It has some very solid landing characteristics and the manual figures for the CG and flight controls worked out very nicely. I tried my best to get it to snap out, on a tight turn and pull up...and was pleasantly surprised-none, even at high rates. I've had small and larger WWII fighters snap out on me with to much of an aggressive pull out or tight turn. Its a bit faster then a club members P-51D, with a Super Tiger .29, bolted on. I did spend an hour bench running my engine, prior to the first flight and it paid off. Good idle and easy engine shut down, with an idle down set-up on the Tx. It also steered well with the tail wheel I installed and made a nice taxi out and take off. Just a couple of clicks of right aileron, and it was off to the races. A very predictable flying little fighter and was a blast to fly.

I've the F-82 on the work bench (sure wish I had a couple of OS .15 CVA's) and I've located a Pica FW 190 kit, with this kit next.

Soft Landings Always,
Bobby of Maui

Last edited by Bob Paris; 03-08-2014 at 06:51 PM.
Old 02-19-2014, 10:20 AM
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DaneMcGee
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Originally Posted by Bob Paris View Post

...........................I've the F-82 on the work bench (sure wish I had a couple of OS .15 CVA's)
i
I don't think you'll need theCVA's.

I fly twins in RCCA 2948 scale combat with two Magnum 15XLS and 8x3 props. They perform as good or better than any of the .25 powered singles.

Heres a link to one of my latest builds.: http://rccombat.net/forum/viewtopic.php?f=34&t=13894
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Old 05-22-2014, 05:05 PM
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Any idea what the electric equivalent of these engines are? I'd like to build up one of these coroplast combat planes but I'm not a nitro guy so I'd rather use an electric setup. I'm not good enough to fly with the combat guys yet so my buddy and I wanted to build up a couple we could practice with. For us it will be easier to start with electric then when we get better and want to fly combat with the group, then we can build up a nitro plane.
Old 05-23-2014, 10:01 AM
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Originally Posted by InspGadgt View Post
Any idea what the electric equivalent of these engines are? I'd like to build up one of these coroplast combat planes but I'm not a nitro guy so I'd rather use an electric setup. I'm not good enough to fly with the combat guys yet so my buddy and I wanted to build up a couple we could practice with. For us it will be easier to start with electric then when we get better and want to fly combat with the group, then we can build up a nitro plane.
Several guys ran electrics in their twins. Tons of info here: http://rccombat.net/forum/viewforum.php?f=34

I run glow engines because it is way lighter than the electric systems needed for these twins to be competitive.
Old 07-09-2014, 09:57 PM
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Hi pilots, I can see here some talking about Me-209H-V1 1/12 which I produced about 10 years ago together with S.Spitfire Mk.IX. The Mess was the best model 2003 on Model Hobby Fair in Prague and I still have some pieces in stock. If you are interested in see http://www.jhmodels.eu sites for more informations. Check your six, Josef


Last edited by Hyza; 07-09-2014 at 10:10 PM.
Old 07-10-2014, 12:29 AM
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Contacted the admin to request access...sent him a user name then never heard back from him...then sent a pwd as a follow up just in case that's what he was waiting for and still no reply.

Eventually I may get into glow engines but I really don't like tuning them and prefer electrics. Right now it will only be me and a few friends flying combat together with evenly matched electric planes until we get good enough to join the regulars.
Old 07-13-2014, 04:51 AM
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DaneMcGee
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Originally Posted by Hyza View Post
Hi pilots, I can see here some talking about Me-209H-V1 1/12 which I produced about 10 years ago together with S.Spitfire Mk.IX. The Mess was the best model 2003 on Model Hobby Fair in Prague and I still have some pieces in stock. If you are interested in see http://www.jhmodels.eu sites for more informations. Check your six, Josef


Very Nice.
Old 07-13-2014, 05:38 PM
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I flew 1/12 scale combat for some years. My models were utilitarian, blue foam, brown paper, pop bottle cowls and the simplest paint scheme I could get away with.

However I was totally blown away by the quality of the stuff pilots from the Czech Republic, Poland, East Germany would turn up with. Lightweight epoxy fuz with panel lines moulded in. Sometimes a moulded wing if not glass covered foam that had been vacuum bagged. Often carefully painted and with correct markings. Mine got a couple of minutes with a rattle can followed by markings applied by hand with a sharpie.

I don't know if these are that good but the one I won as a prize certainly was. An ME 609 which I finished as an electric showpiece.
Old 03-18-2015, 09:09 PM
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Accurate combat models are fun... for os 0.30 fs 1/12 Brewster...
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