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

magnum.... airplane?

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Old 05-01-2006, 01:42 PM
  #1  
max plank
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Default magnum.... airplane?

what so great about the magnum ? i never had at worse flying speedplane and its not that fast at all... to f...ing heavy! but its pretty... looks nice hanging on the wall..
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Old 05-01-2006, 02:10 PM
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Default RE: magnum.... airplane?

RIGHT, not trying to bash a commercial kit. But let’s do some summarising:
[ul][*] No fully cowled engine
[*] No fully enclosed tuned pipe
[*] Absolutely unacceptable wing layout (aerodynamically) for straight line speed
[*] Efficient wing airfoil for straight line speed? - I don’t think so.
[*] Too wide fuselage
[*] Too thick tailfeathers

....
[/ul]
Any more deficiencies of this pseudo speed plane to list?

Regards

slomo

P.S. There seem to be a reason why nobody of the numerous Magnum and Magnum R owners do not compete during the German Speed Cup...
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Old 05-01-2006, 03:52 PM
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Default RE: magnum.... airplane?

Lets remember guys,

This aircraft is an ARF sport speed bird. Its more of a quick pattern-ship-jet-like thing - just with some appeal in styling and some decent flight characteristics. There are a number of other similar designs available on the market. It provides room for an easy radio installation, a simple engine installation, and wing layout and airfoil that provides good handling characteristics over a wide range of speeds. Clearly, it was never intended as a purpose all-out speed designed for competition speed trials.

Folks flying the Magnum are looking for decent speed, decent looks - something that is easy to setup and not difficult to fly ....and something relatively inexpensive. And in those respects, its a pretty good airplane.

What most of the folks here consider speed planes, is anything that is significantly faster than most other planes found at a flying field.

Bob
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Old 05-01-2006, 04:04 PM
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Default RE: magnum.... airplane?

IF you are going to BASH. Tell us your set up and WHY ???
ORIGINAL: max plank

............and its not that fast at all..................

well Max what engine are you flying? OS .25 LA ???

what is your definition of "fast"

I getting 180mph from mine with a Sport Jett .50
My buddy got 190mph from his with the Weston .50 V1 & pipe combo

For $100.00 US dollars it is a good value
About 320.00 for plane engine & pipe combo
I have no idea what it is in Euros or how much extra you pay in VAT taxes! [&:]
AND yes the trailing edges of the tail feathers are too thick! the should come down thin as possibe.

Remember the Whiplash ????
1st edition was heavy and had hinge problem about $150.00 in the US
2nd version the EXTREME all kevlar about $400.00 YIKES.... but it was way lighter.
3rd version Whiplash X 4 ounces heavyer than the X but half the cost.


SLOMO777

Did you compete in the German Speed cup?
Were there any off the shelf ARFs competing?
Were there any off the shelf engines competing?
What is your fast plane/engine set up and what did it cost you?
( if you made you own plane how many hours did you have in design and construction ? )

SO PAH-LEEEZE tell me what ARF do you consider fast?
where can one buy it?
AND for how much?
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Old 05-01-2006, 04:36 PM
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Default RE: magnum.... airplane?

a phoenix F-20 is slower and more expensive and I can´t see anybody saying it is too slow, wings too thick, etc etc...
Magnum could be better yes... but it cost 120€ here in portugal!! A trainer Kiosho Calmato is more expensive then this ship!
Corvidae planes can be faster (I dont know) but they are not ARF and are a little bit more expensive I think...
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Old 05-01-2006, 05:18 PM
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Default RE: magnum.... airplane?

Magnum is not that fast you say...?

Compared to what?

Sounds like a troll to me
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Old 05-01-2006, 06:56 PM
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Default RE: magnum.... airplane?

ORIGINAL: Crazy4Flight

SO PAH-LEEEZE tell me what ARF do you consider fast?
where can one buy it?
AND for how much?
Hello Crazy4Flight,

well I carelessly overlooked that there are two very different parties involved:

1. The Plug-and-Play, ARF fun sport speed pylon …. Freaks

2. The very small but innovative speed crowd looking for new designs and interesting improvements including
[ul][*] full composite lightweight construction methods[*] engine and pipe modifications (or complete home made solutions)[*] individual carbon fiber speed props (any new speed plane design needs a new prop design/size – that’s my personal experience)[*] computer aided calculated aerodynamic improvements for wing/stab airfoil and layout and for propeller airfoil and layout (there is some good software on the internet)[*] speed measurement over a defined distance (150 m or 200 m) in both directions eliminating wind impact, so the term “fast” eventually loses its subjective nature being very beneficial for objective international comparisons of speed results in future (compare all “200” mph Magnums, DDs, Whiplashs to be found in this forum,…)[*] etc. [/ul]

In other words, even an aerodynamically very well designed 2.5 cc speed plane will be faster than the worlds fastest Magnum ARF.[X(]

Regards

Slomo

P.S. I personally will most likely not sell any composite “kits” of my new home designed speed planes which I am going to compete with in Osnabrueck – too much R&D and risk of knock-offs involved. Same applies to the props. So the larger the number of different plane and prop designs out there the better for future speed improvements. And IMHO building and flying home made designs is much more satisfactory. Guys, please take a look at my posts here at RCU where some (inexpensive) speed tips can be found…




[sm=sleeping.gif]
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Old 05-01-2006, 11:20 PM
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Default RE: magnum.... airplane?

Don't know why you guys are playa hatin' on the Magnum. It was always advertised as a fast sport plane, nothing more...

Also, if you know of a faster arf in the $100-$120 price range then I'm all ears...share the love...
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Old 05-02-2006, 08:51 AM
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Default RE: magnum.... airplane?

There is no "gray area" on the plane. Would not own one but launched enough of them to see them fly. With a paper thin wing and the weight, they fly fast and drop like a brick when the engine is off. Very simple concept. You either like it or you don't.
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Old 05-02-2006, 09:06 AM
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Default RE: magnum.... airplane?

I am with Razor on this one.
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Old 05-02-2006, 01:17 PM
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Default RE: magnum.... airplane?

i ran a os 50 sx with tuned pipe .. i have a home buildt flying ving that is faster and it cost me les than 50 buks too make and it will fly with the engine off.. i dit not want too ofend any but there are alternatives.. SPELL CHECK HOO NEEDS IT
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Old 05-02-2006, 01:34 PM
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Default RE: magnum.... airplane?

Aw shoot, you gotta be kiddin me....a 50sx on anything is sslllloooowwww. It would suprise me if you were humpin over 125.

Put a real motor on that magnum then come talk trash

And like I said before....show me a speed plane arf in the $100-$125 range that will beat the magnum. I would like to buy it...and NO, I don't want to build my own...
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Old 05-02-2006, 01:49 PM
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Default RE: magnum.... airplane?

HAY GUYS & SLOMO777:

Easy on each othger!!!!! Each side of the pond lives in a different world. On our side, the AMA forbids us to exceed 200 mph in our rules, although the formulas occasionally crack this by a little. On Slomjo777's side, there are no such restrictions and those guys are pushing the speed prop envelope far beyond what most of us want to try. Note that these guys are designing and building their own composite airframes, make their own carbon fiber props, do their own engine mods. I wonder if there is ANYONE from our side of the pond will compete in the Speed Trials that will come about later this year. Most of us are not willing to put the bucks and time into pure speed. Most of us here like a fast airframe that will turn left well and have a reasonable chance of repeating. The European guys use no landing gear, all controls are hidden (a art in itself) everything designed for reduced drag and all out speed. We expect our engines to run a year or more, I suspect they will be hppy if their engines stay togeather for the weekend. I would love to be able to see the Trials in person, but just is not going to happen. A little understanding of our differences will go a long way to our mutual goals. I have printed some of Slomo777's comments on various engines with the intent of building something outrageous around the two OS 90VRDF engines sitting in the cabinet later this year after my zoomer is up and flying. Will need some help from everyone, especially on how to keep a enclosed tuned pipe from burning things down. ENJOY Bro 119
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Old 05-02-2006, 02:25 PM
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Default RE: magnum.... airplane?

ORIGINAL: rmenke

HAY GUYS & SLOMO777:

Easy on each other!!!!! Each side of the pond lives in a different world. On our side, the AMA forbids us to exceed 200 mph in our rules, although the formulas occasionally crack this by a little. On Slomjo777's side, there are no such restrictions and those guys are pushing the speed prop envelope far beyond what most of us want to try. ENJOY Bro 119
You said it. SloMo, lighten up brother [8D]. Every time someone mentions a Magnum or other sport speed plane being "fast", you don't need to reprint the entire bit about the German speed cup again - we get it already! While this is the "extreme speed" forum, take that name with a grain of salt, it means different things to different folks. Otherwise, we might need the following:

- the Extreme Speed Only for Dedicated Diehards who Scratchbuild Composite Speed-or-Nothing Aircraft forum
- the Pylon Racers being Flown for Sport Speed Thrills, sometime with Oversize Engines forum
- the Pretty Fast Sport Speed ARF/scrathbuilt forum
- the Fairly Fast Sport Jet ARF with Oversize Engine forum
- the Overpowered Plain Old Sport Aircraft that Moves Along Reasonably Quickly forum

etc.

I'd love to see the Speed Cup, and am looking forward to pics and videos and would love to hear the technical details people are willing to share. But there are a pile of people who aren't that dedicated to all out speed, and aren't willing to devote their lives to developing speed aircraft. There are a whole bunch who just like to fly faster than sport aircraft with whatever interests them and/or what they can afford time or money-wise.

It's all good!

MJD
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Old 05-04-2006, 10:49 AM
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Default RE: magnum.... airplane?

sory if i hurt someone feelings.. about the 50sx+ tuned pipe .. makes the same power as the weston engine ! i hawe both in the stable..[sm=thumbup.gif]
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Old 05-04-2006, 08:50 PM
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Default RE: magnum.... airplane?

If your 50SX makes the same power as the West 50, then there's something seriously wrong with your West IMO
I have yet to see ANY OS .50 make some useful power at 21-22K rpm.
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Old 05-04-2006, 09:51 PM
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Default RE: magnum.... airplane?


ORIGINAL: max plank

sory if i hurt someone feelings.. about the 50sx+ tuned pipe .. makes the same power as the weston engine ! i hawe both in the stable..[sm=thumbup.gif]

My friends Weston turns an 8x8 APC 21,500 rpm

I have a OS 50 SX and the best it turns is 15,500

The OS porting is not timed high enough to match a Weston

what props are you running????
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Old 05-05-2006, 10:16 AM
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Default RE: magnum.... airplane?

my 50 sx turns 8x8 apc 21000 rpm could something be wrong with your 50 sx ? 15500 ? it makes its power at 18000 rpm with standard pipe..
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Old 05-05-2006, 12:22 PM
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ORIGINAL: max plank

my 50 sx turns 8x8 apc 21000 rpm
Well... congratulations then!
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Old 05-05-2006, 05:09 PM
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Default RE: magnum.... airplane?

Hi Rmenke,

Isn't the 200mph limit only for turbines?

Jonathan
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Old 05-05-2006, 06:37 PM
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Default RE: magnum.... airplane?

I have a TT46pro with a 9/7apc on my shrike turning 17,000rpms[X(]. At 5000ft. On an 85degree day. In the rain. With 10%Omega. By a Tower plug!!! And no wheels!!!!
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Old 05-16-2006, 10:58 PM
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Default RE: magnum.... airplane?

Max- You are getting 21K with your OS-50SX? Sorry, but I simply do not believe you...
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Old 05-18-2006, 11:53 AM
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Default RE: magnum.... airplane?



u better belive it ... and it turns 18000 with standard pipe ! what so strange ! look in the OS specifikations... 1.8 ps @ 17000

try it !!! put a small prop on and it skreeeeems..
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Old 05-18-2006, 12:10 PM
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Default RE: magnum.... airplane?

I'll have to finish running in my OS50SX with a tuned muffler borrowed from my VMAX .52, I have since got a TNC tach, I'm sure it will do alot better than 15,500
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Old 05-18-2006, 01:58 PM
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Default RE: magnum.... airplane?

I bet it does it on fai fuel too...

Sorry but could not resist
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