Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Looking for Suggestions for a twin...

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Old 11-20-2007, 05:43 PM
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Crazy4Flight
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Default Looking for Suggestions for a twin...

Looking for Suggestions for a twin...

cleaned up the shop and checked inventory

I have:

2 OS .25 FX both like new very low time like new....

2 OS. 32 SX one nib the other like new very low time

I can get 2 Jett Sport 50s side exaust by taking one out of the LR-1 and put the QM-40 in it....

so what should Santa put under my tree?
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Old 11-20-2007, 07:55 PM
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Default RE: Looking for Suggestions for a twin...

i was just thinking the other day how a twin engine plane might be a great way to get some more speed. then i thought maybe 2 scat cats or similar could be kit bashed into a p-38 type of build. i have not put any further thought into it yet? is it possible?
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Old 11-20-2007, 08:05 PM
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jmohn
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Default RE: Looking for Suggestions for a twin...

OV-10 would make a good twin and is available in a good number of kits. It's pretty fast too!
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Old 11-20-2007, 08:53 PM
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daven
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Default RE: Looking for Suggestions for a twin...

I had the .40 sized OV-10 Bronco with .25 FX's in it and it was a very nice plane. Speed probably right around 100mph. Not fast enough for me, but a very nice plane none the less. I always wanted to build the Great Planes P-38 kit and use the .25FX's, but haven't gotten around to it. I think it would be a little faster, but not much, and you would have to deal with a nose heavy plane..
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Old 11-20-2007, 10:15 PM
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Crazy4Flight
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Default RE: Looking for Suggestions for a twin...

2 scats or sonic 500 would blend better as a F82 no?

but then the sonic 50 could not hold up to a JETT SS40 my 50s would tear it apart..!
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Old 11-21-2007, 08:40 AM
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evan-RCU
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Default RE: Looking for Suggestions for a twin...

There's a pix of a twin delta I call Banditos in my folder if you look. It's an enlarged Jerry Smith Outlaw with twin modified MVVS .40's.
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Old 11-21-2007, 11:07 AM
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cottp51
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Default RE: Looking for Suggestions for a twin...

P-38 BABY!!!!!!!!!!
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Old 11-21-2007, 11:29 AM
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js3
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Default RE: Looking for Suggestions for a twin...

I once had thoughts of a .60 sized Ultra Splat with to OS .32 FSRs. Never got around to building it though.
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Old 11-21-2007, 02:12 PM
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rmenke
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Default RE: Looking for Suggestions for a twin...

Whoa guys:

Look at who's looking, average thinking will not do here. Fast but agile. Well, maby "Black widow', P-38 at 50-55" WS. Engines. Come on, nothing else than two Jett LX 60's will do for this guy and his project. The best must demand the best. Without doubt, the "Best" people in the world start out with the Rever Brotherhood. Have a good holliday guys, may God keep you all well and safe. ENJOY
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Old 11-21-2007, 03:29 PM
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Default RE: Looking for Suggestions for a twin...

I'm assuming that you're also crazy4speed.....

so: for the pair of SJ50's , a Duelist 2/40 with retracts would be very nice but mild. (BTW, COX Models makes them as an ARF now)

For a high speed and different model, but it will take some bashing (composite bashing at that), I would love to see you get another LR-1 and put together a twin like the twin mustang. It'll be around the size of a .40 model but will have 2xSJ50 so it should move along nicely.

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Old 11-21-2007, 06:19 PM
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Default RE: Looking for Suggestions for a twin...

Here's a twin I made from a Diamond Dust kit from Morris Hobbies. The center section was widened 12", as I recall. I bought new, longer, carbon spars at a local kite shop for a few bucks. I wanted a rudder for snaps & spins (it does a nice nose up flat spin) so I went to a single fin and rudder. It's also handy for launching. You could stick with the twin fins.

The engines are 2 OS .25FXs, but anything up to 50s would work. The .32s would be great. I have Jett tuned mufflers on mine.
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Old 11-21-2007, 11:37 PM
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Default RE: Looking for Suggestions for a twin...

Ripmax Harmony

http://www.ripmax.com/item.asp?itemid=A-ARTF6713
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Old 11-22-2007, 08:12 AM
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Default RE: Looking for Suggestions for a twin...


ORIGINAL: dhal22

i was just thinking the other day how a twin engine plane might be a great way to get some more speed. then i thought maybe 2 scat cats or similar could be kit bashed into a p-38 type of build. i have not put any further thought into it yet? is it possible?
A twin engine/ twin boom Scat Cat has been done, some time ago. I clearly remember the picture but do not remember which mag and issue it was in. So it is definitely possible. Well, anything is possible of course, within reason. So yeah, no reason you couldn't do such a thing IMHO. A bit more wing maybe, add a center section to space the fuselages, a bit more stab area between the booms, twin verticals and off you go. Retracts?..

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Old 11-22-2007, 08:38 AM
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Default RE: Looking for Suggestions for a twin...


ORIGINAL: dhal22

i was just thinking the other day how a twin engine plane might be a great way to get some more speed. then i thought maybe 2 scat cats or similar could be kit bashed into a p-38 type of build. i have not put any further thought into it yet? is it possible?
Like this sort of thing?

MJD

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Old 11-22-2007, 10:08 AM
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Default RE: Looking for Suggestions for a twin...

The plane will be nose heavy if built like the drawing. The backplate of the motor should be nearly even with the LE of the wing. My father-in-law built one like that with Webra .28's, but it was a blackjack kit if I remember correctly. Really not any faster than a quickie with a .46 sport motor on there, but it sure sounded good.
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Old 11-22-2007, 11:53 AM
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Default RE: Looking for Suggestions for a twin...

Twin fuselage twins fly extremely well. I have attached photos of 2 of them. You do need some stab outside of the fuselage. As a rule of thumb, you want the horizontal tail area to be in the 20%-25% of the wing area. You also want the fuselages fairly close together. For the .46 size, I normally use 14" spacing so I'll have 2" clearance on a 12-4 prop.

If you do go this route, the easiest stab set-up we have found is to make the stabs separate and join them with landing gear clips or plywood strips in the center. Many people like to make a 1-piece stab and bolt a cross piece to the fuselages after removing the wing. The way I work, this results in a broken tail. I use 2 separate fuselages, 4 servos in each and mix everything. I fly a JR 9303 which has a Mate system for mating up channels like dual elevators so there is no delay. Y connectors would work, too. I put the receiver, battery and switch in the center wing area.

If you really want speed, get the Diamond Dust and make it a twin with the 2 Jetts. That would be something.
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Old 11-23-2007, 08:12 AM
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Default RE: Looking for Suggestions for a twin...


ORIGINAL: daven

The plane will be nose heavy if built like the drawing. The backplate of the motor should be nearly even with the LE of the wing. My father-in-law built one like that with Webra .28's, but it was a blackjack kit if I remember correctly. Really not any faster than a quickie with a .46 sport motor on there, but it sure sounded good.
That was just a quicky sketch I did freehand on AutoCAD after reading the above post, took all of about 8 minutes - no CG calcs, area relationships or SWAG's were used! Fer shure it would be tail heavy. It was just a CANS - Computer Aided Napkin Sketch - to illustrate the rough idea of such a beast.

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Old 11-23-2007, 09:20 AM
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Default RE: Looking for Suggestions for a twin...

I have made a complete piston mold from a bar napkin sketch!
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Old 11-23-2007, 06:28 PM
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Default RE: Looking for Suggestions for a twin...

I would like to see a swept wing, tapered wing with winglets and elevon control. Mount the engines as close together as practical and make the center airfoil just thick enough to house the battery and RX. Make the plane fairly high aspect and build teardrop shaped nacelles for the engines. I have built a 1/2A single engine version of this idea and it is a good flyer. A twin .32-.50 version might have to be a pusher to get the CG where it belongs.
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Old 11-24-2007, 09:30 AM
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Default RE: Looking for Suggestions for a twin...

ON BLACK FRIDAY I ORDERED NITROPLANES CESSNA 337 ARF .25

SHOULD WORK FOR THE 2 OS.32SX
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Old 11-24-2007, 10:30 AM
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Default RE: Looking for Suggestions for a twin...

Looks good, should work fine.
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Old 11-24-2007, 10:35 AM
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Default RE: Looking for Suggestions for a twin...

looks good is half the battle...getting it to fly right i the other
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Old 11-25-2007, 06:57 PM
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Default RE: Looking for Suggestions for a twin...

Geez! I can't believe all that exotic stuff you guys come up with! Kudos to you all though. Hey, if you want a quick and easy project for those O.S. .32 sx's, just pick up a Hobbico Twinstar arf - like a bit over $100.00 bucks. A week later and bingo! I flew mine all last summer and loved it. Everyone at our field stopped to watch and listen every time I flew. I think it looks great on the ground and in the air. It looks and sounds fast to the folks around here, but we're not speed demons of the highest degree either. Good luck!

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Old 11-25-2007, 09:44 PM
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Default RE: Looking for Suggestions for a twin...

my first kit bashed twin SIG Wonder 2 OS.15 FP

The tails dont match becuase I forgot them behind in Michigan, I was flying with friends in Fla.
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