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No.. could it be..?

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

No.. could it be..?

Old 02-24-2017, 10:46 AM
  #626  
OliverJacob
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I'd be interested. Even more interested in a larger version - I have a 60 Rossi on the shelf. And a 90 OS.
Old 02-24-2017, 11:00 AM
  #627  
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Subs
Old 02-24-2017, 02:50 PM
  #628  
Jetset
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Yeah, I have a K&B .45 ducted fan engine and pipe just sitting here looking for a home.
Old 02-25-2017, 09:39 AM
  #629  
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A SD would be perfect for something like that.
Old 06-10-2017, 10:20 PM
  #630  
OliverJacob
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Just flew my SD for the first time after I installed a 50 Weston. Real screamer and super fast, I wound up loosing a rudder ad just spiraled down like a leaf. Rudder landed about a minute later. Smoother than my usual landings

So I'll have to make the rudders stick to the plane better without adding much weight and certainly I have to dial the rates down
Old 06-11-2017, 01:26 AM
  #631  
Jetset
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OK I gotta get one of thee things!
Old 06-17-2019, 02:48 PM
  #632  
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Default Short kit?

Hi do have any short kits u would sell

Cfox
Old 06-17-2019, 04:34 PM
  #633  
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Funny thing I actually still have mine but I am not parting with it. Sorry.
Old 06-23-2019, 10:05 PM
  #634  
felker14
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Originally Posted by MJD View Post
I am about to make another small batch of them. I do this on a very casual basis, but your timing is good.. PM me.
I be interested in a kit.
Old 12-28-2020, 04:06 PM
  #635  
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I'm finally building one of the short kits Mike cut 5 years ago...and I must say, this is some of the cleanest most accurate laser cutting I have ever seen.



It will make a good home for the BSE Jett FiRe 50 that has been laying and waiting dormant for about 15 years in my engine cabinet.
This is a high timing engine I had Dub Jett put together, built for high rpm piped operation, complete with counter balanced 2" spinner.

Should be a blast.
Old 12-29-2020, 11:42 AM
  #636  
petec
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Guess I should paint mine and put the servos in it. K&B 7.5cc DF engine. I was almost done with it when life got in the way, thanks for the nudge.
Old 12-29-2020, 12:03 PM
  #637  
OliverJacob
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Originally Posted by petec View Post
Guess I should paint mine and put the servos in it. K&B 7.5cc DF engine. I was almost done with it when life got in the way, thanks for the nudge.
I flew mine with a West 50, this engine puts the MagnumR to 200 mph, the Deamon is smaller and likely even faster.
Not for the faint of heart :-)
Old 12-29-2020, 01:46 PM
  #638  
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I hate to break it to you, but a West 50 has never gotten anything up to 200mph.
I know, I flew them a lot.

I just ran the Jett fire 50 on the stand, it puts a West 50 to shame honestly.
I used the same header length and a Weston pipe from my Magnum, it gets on the pipe slobbering rich, with an 8x9 prop.
Where on the West 50 I ran an 8x8, and the engine was giving all it could give.

I will set the header length tomorrow.
Hoping to see over 22.000 rpm when I'm done.



Originally Posted by OliverJacob View Post
I flew mine with a West 50, this engine puts the MagnumR to 200 mph, the Deamon is smaller and likely even faster.
Not for the faint of heart :-)

Last edited by Rudeboy; 12-29-2020 at 01:48 PM.
Old 12-29-2020, 04:57 PM
  #639  
MJD
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I flew my prototype Demon on a West .50 that I previously flew on a Magnum R. I set it up on the bench with an open pipe peaking at 20,500 rpm, best speeds were on a 8.8x9.25 trimmed down to about 8.25". I would say the Demon was a good 10-15 mph faster than the Magnum., which corresponds with the typical speeds recorded for West .50 Magnums which are in the 165 mph range. I recall that one person reported that the best radar clocking of their Magnum combo was 167 mph. A strong .50 on a clean Demon is good for 170-175. When I swappeds out th Est .50/open pipe combo for a SportJett .50 SE with the regular red muffler, I could not tell any difference in top end if there was any. An immigrated European F3D pylon flier saw it when I visited a local club one day, and shouted out after the first fast pass, in a thick Russian accent "dat must be sree hundret kilometers per hour!".

This is the absolutely terrible (yes I know!) video taken of the test flight - this was the prototype of the Demon after I had taken over the kit way back, and was the first time I had ever flown a delta to boot. So I kept it 300 feet up or so most if the time until I got more comfortable, as the field is ringed by trees. Plus, the guy filming had no idea what to expect or how to film moving objects..

The Magnums were quick indeed, but the ad copy was absolute hogwash! Apparently Dub Jett tested one of the West.50's and was impressed with the power output nonetheless.
Old 01-11-2021, 04:05 PM
  #640  
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Coming along slowly but surely.
Old 01-11-2021, 07:10 PM
  #641  
MJD
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Nice work!

Did you add shear webs at the back of the D box? Will really perk up the torsional stiffness. Glad to see the wing jigs doing their thing!

You have the makings of a 300kph machine there.
Old 01-12-2021, 05:09 AM
  #642  
Rudeboy
 
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Yes, the leading edge is D-boxed.
It becomes rock solid at that point.

The little jigs are great for building a straight wing!

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