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

For the Love of Deltas

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Old 02-02-2007, 02:12 PM
  #1  
Lomcevak Duck
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Default For the Love of Deltas

Because deltas often get a bad rep with the thoroughbred speed freaks, we need a delta club! We all know deltas don't normally hold up to their 200+ MPH claims, and we know they won't beat a German super-duper-nothing-but-straight-lines-cost-me-more-than-most-people's-car-cost-them all out speed design. But what we lovers of triangles do know is that flying is FUN! And it's not always a competition, and it's ok to be 10 MPH slower as long as your plane is cool. And that it's ok to have a throttle as well as an engine that doesn't take an hour to tune for a three minute flight.

So stand up and be counted delta lovers! Post some pics, and tell us about your set up!
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Old 02-02-2007, 02:16 PM
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Default RE: For the Love of Deltas

My current delta is a bone-stock Diamond dust with a mostly worn-out .32SX on the front. Flies very well, and because of its low weight launches like a dream. I'm thinking of selling it off at the Perry, GA swap meet in favor of a new Phenom and .60LX.
Sorry, no pics available right now, but I'll try to add some soon.

-Steve
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Old 02-02-2007, 07:27 PM
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Default RE: For the Love of Deltas

I am a Certified Delta Lover! I have had 3 Whip's and love every one more than the last...

I have a Whiplash-X with a K&B-48, Ultrathrust Muffler, Hitec-645MG's and a 6V pack, all wrapped inside my shaker-can paint job!

I also received one of the killer Phenom's which will house an OS-50SX, Hitec-5645 Digital's and ANOTHER shaker-can paint job.

Pics to follow when I get home from work LATER--

I need to at some point get a "Dust" also---
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Old 02-02-2007, 08:31 PM
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Default RE: For the Love of Deltas

Here are two sport scale delta prop jets of mine. Not very fast (with this kind of propulsion) but good looking birds. However the Mirage comes "alive" with a strong .40 and a 7x7 prop.
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Old 02-02-2007, 09:51 PM
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Default RE: For the Love of Deltas

200mph.

Twin modified .40 MVVS pylon motors..... You can see the rest.
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Old 02-02-2007, 09:57 PM
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Default RE: For the Love of Deltas

Not 200mph.

Diamond Dust sheeted LE's, MVVS .40 pylon motor.

Outlaw on floats. Mildly modified Jerry Smith Outlaw

Mini Dust .061 powered little screamer

And I have to throw in a Magnum pic
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Old 02-02-2007, 10:53 PM
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Default RE: For the Love of Deltas

Ooohhh neat twin. And the Magnum is almost a delta.

Well, not quite, but it's cool too.
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Old 02-03-2007, 12:18 AM
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Default RE: For the Love of Deltas

Outlaw on floats! [sm=thumbup.gif]
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Old 02-03-2007, 01:54 AM
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Default RE: For the Love of Deltas

Here are my pics--

Whip #1, YS-45 (Note to self- do not use plastic spinner in this situation)
Whip#2, Jett-50
Whip#3, K&B-48

And my Maggy-
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Old 02-03-2007, 08:37 AM
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Default RE: For the Love of Deltas

ORIGINAL: evan-RCU

200mph.

Twin modified .40 MVVS pylon motors..... You can see the rest.
I am sorry to intervene again, but this Outlaw twin delta will never fly 200 mph. I have seen your video. Although these modified MVVS FIRE engines (obviously Q500 timed to still accept these large props) seem to run a bit on the rich side your fastest runs were about 150 mph maximum.

Generally it is very unlikely that a twin powered delta is really fast. The reason is simple: The additional drag involved by the second engine devours the extra power. To compensate for the drag factor we only can respond with much more power. However even a twin powered MB 40 delta would hardly see 200 mph.

Some time ago there was a good example of a twin JETT 50 LX powered DD here in this forum named “Chill Factor”, a nice instance of veryfied 150 mph (see pic below). Remember your FIRE MVVS engines make less power than the those JETTs.

So the more streamlined an airframe the better and the more efficient the available power can be transferred to speed (e.g. using effectively oversquared prop sizes which is critical for deltas in general).

But a twin powered motor sound still in fact sounds like 250 ++ mph subjectively!


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Old 02-03-2007, 08:43 AM
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Default RE: For the Love of Deltas

This black delta, powered by a high timed .60 FIRE, is capable of about 160 mph. By using a .90 DF engine maybe real 190 mph are possible, not more!
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Old 02-03-2007, 08:56 AM
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Default RE: For the Love of Deltas

Finally, here is one of the fastest delta designs known so far here in Germany.
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Old 02-03-2007, 10:38 AM
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Default RE: For the Love of Deltas


ORIGINAL: I-Love-Jets

ORIGINAL: evan-RCU

200mph.

Twin modified .40 MVVS pylon motors..... You can see the rest.
I am sorry to intervene again, but this Outlaw twin delta will never fly 200 mph. I have seen your video. Although these modified MVVS FIRE engines (obviously Q500 timed to still accept these large props) seem to run a bit on the rich side your fastest runs were about 150 mph maximum.

Generally it is very unlikely that a twin powered delta is really fast. The reason is simple: The additional drag involved by the second engine devours the extra power. To compensate for the drag factor we only can respond with much more power. However even a twin powered MB 40 delta would hardly see 200 mph.

Some time ago there was a good example of a twin JETT 50 LX powered DD here in this forum named “Chill Factor”, a nice instance of veryfied 150 mph (see pic below). Remember your FIRE MVVS engines make less power than the those JETTs.

So the more streamlined an airframe the better and the more efficient the available power can be transferred to speed (e.g. using effectively oversquared prop sizes which is critical for deltas in general).

But a twin powered motor sound still in fact sounds like 250 ++ mph subjectively!



Yeah, yeah, the people that built the Twin DD sold it after a few flights because they could never get it to run or fly right right, they did not ever get it to it's potential. It doesn't matter what engine you have if it's not "ON". Two thirds of the Twin Outlaws flight have been "OFF", but those "ON" flights are awsome. If you don't think my twin got to 200 good for you. I know what it can do and how much faster than my radar clocked Magnum it is, approximately of course because I did not get a radar gun on the twin. But the Magnum has hit 161mph and if you see them fly back to back you will agree the twin is much more than 40mph faster than the Magnum.
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Old 02-03-2007, 10:42 AM
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Default RE: For the Love of Deltas

By the way the peolpe that built the Chill did so because they saw my Twin.... And the MVVS's where higher timed with larger carbs than Q500, as big as they could bore and still draw fuel.

But still belive what you want... All of us here know only the Germans have fast planes...
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Old 02-03-2007, 03:33 PM
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Default RE: For the Love of Deltas

Evan,

Maybe you could send an audio record of your twin outlaw to Germany ? That would clear things up
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Old 02-03-2007, 05:04 PM
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Default RE: For the Love of Deltas

Did someone say "deltas."

I had a Mach Racer with a Magnum .52XLS and a Rossi mini-pipe. It turned up pretty well on a 9-7 prop. I bashed it from mechanical failure. I had made up 4-40 pushrods and probably had a solder joint fail. Next time I am using the short titanium pushrods.

My other delta is a twin Diamond Dust with 2 OS .25FX engines with APC 8-7 props and Jett pipes. I have thought about dropping in 2 .46 engines, but the CG would be way off.
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Old 02-03-2007, 06:04 PM
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Default RE: For the Love of Deltas


ORIGINAL: Strykaas

Evan,

Maybe you could send an audio record of your twin outlaw to Germany ? That would clear things up
Not sure if a twin and WaveOScope are compatible but the only video of the Outlaw I had came up with a max speed of 150 mph. The twin Outlaw video back to back with a 200 mph f3d video did show the f3d noticeably faster just by looking. I only had one sample of the twin Outlaw and am not taking sides here.
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Old 02-03-2007, 06:46 PM
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Default RE: For the Love of Deltas

And of the dozen or so flights only one, the first had been video recorded. And like I said sometimes it's on and sometimes it's off...

My point is actually I don't care if it's 200, though I think it is, I think the neat thing is the idea itself, a twin, a fast airplane and it's unique.

If I'm out for a race I'll show up with a Magnum, it's not the fastest but it starts first flip, is consistant, flies great and looks great in the air. Even whe we get a DD or Magnum in the air at the same time as an regular .32 powered Outlaw it's a blast and there's probably a 25mph difference between them, it's who fly's the smoothest and it's all in fun anyway.
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Old 02-03-2007, 07:53 PM
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Default RE: For the Love of Deltas

I am sure there are faster passes then what I happened to sample. There is no question you have a fast airplane and the WOW factor is very high. I like your Outlaw!
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Old 02-03-2007, 10:25 PM
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Default RE: For the Love of Deltas

I Love Jets:

Ahaaaaaaaaaaaaaaa: Now, this is my kind of bird. Tell me it is available in kit or arf form, what it is and if possible from whom, I gotta have one. Watching your posts with respect and a centain amount of being blown away, I suspect it is your own design and creation. If so, maby you wold like to get rid of the space it takes up? Anyway, appreciate your input in the past and look fodrward to more in the future. Bro # 119 ENJOY
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Old 02-03-2007, 11:54 PM
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Default RE: For the Love of Deltas

I just got into triangles awhile back....they are fun.

Mine aren't fast, but who cares....they are fun anyway.

FBD.
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Old 02-04-2007, 02:13 PM
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Default RE: For the Love of Deltas

saw a huge delta in az. while visiting. the guy said it had been dist. by hobby people, but not any longer. a mans name was attached to the original design. any one know what i`m talking about? i think model tec was the manuf. thanks,russ
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Old 02-04-2007, 05:05 PM
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Default RE: For the Love of Deltas

Here is a serious delta. I thought is was 200 mph but it is only 184. Still sweet though.[link=http://home.vrweb.de/schuebeler.impeller/vector_e.html]Vector II[/link]
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Old 02-04-2007, 07:03 PM
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Default RE: For the Love of Deltas

I speak german! The guy is saying that the delta was clocked at 369 kph or 230 mph. And for those who have doubts he adds that the speed was measured using a GPS system.
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Old 02-04-2007, 07:36 PM
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Default RE: For the Love of Deltas

This DD is one of my winter projects. Right now I have a OS 46FX on it. Still working on it, I will change engine and pipe after I fly it a while.
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