MontJet update

PROBLEM down below.

http://www.ainonline.com/Issues/12_0...spectrum_1.htm
Story about the Spectrum 33

http://www.spectrum.aero/downloads/m...elim_specs.pdf
Specs for the Spectrum 33

Single piece wing .............305 lbs
Fuselage ............................309 lbs
Engine ................................290 lbs
Engine ................................290 lbs
Total so far ......................1,194 lbs

Everything else [S-33].....2,426 lbs
Empty Weight ................3,620 lbs

Single place, single engine MontJet:
[Based on the Spectrum 33 numbers]

Wing .........................45 lbs
Fuselage ..................45 lbs
Jet engine ..............200 lbs?
Everything else ........60 lbs
MontJet Empty Wt .350 lbs
(Double the Empty Weight of the Cri-Cri)

PROBLEM:
I only allowed 60 lbs for "Everything else".

Granted the S-33 is a 10 place jet vs the single seater MontJet. Still,
their "everything else" is DOUBLE the weight of their
wings+fuselage+engine(s).

The MontJet "everything else" is only 1/5 (21%) the weight of the
wings+fuselage+engine.

Hmm.....?


Montblack (Fire in my ...belly!)

Here comes the rich man in his big long limousine
Here comes the poor man all you got to have is green
Here comes the banker and the lawyer and the cop
One thing for certain it ain't never gonna stop
When it all gets too heavy
That's when they come and go
With only one thing in common
They got the fire down below"

"Fire Down Below"
Bob Seger - Night Moves (1976)

"Montblack" wrote in message
...
PROBLEM down below.

Single place, single engine MontJet:
[Based on the Spectrum 33 numbers]

Wing .........................45 lbs
Fuselage ..................45 lbs
Jet engine ..............200 lbs?
Everything else ........60 lbs
MontJet Empty Wt .350 lbs
(Double the Empty Weight of the Cri-Cri)

I see ur problem, and I'm shocked you didn't catch it!

That 200 pounds for engines is way too high! You should have substituted a
couple of Rotax engines, for those.
g

What comes around, goes around. ;-))
--
Jim in NC

("Morgans" wrote)
That 200 pounds for engines is way too high! You should have substituted
a couple of Rotax engines, for those.

VL"J" ...Hello. They're not talking about "Jets" in the carb! g

What comes around, goes around. ;-))

I thought that was your issue with the Rotax all along - that it doesn't
always come back around. chuckle

Anyone out there with a PROVEN jet engine, with a fuel burn under
(Spectrum's per engine average)27 gph, that puts out 800-1,200 pound-thrust,
and weighs under 200 lbs?

15-20 gph* would be nice.

(* For 2 to 4 hour trips at 35,000-45,000 feet. Shorter trips will burn
more)

Otherwise: Williams FJ33-4A [1,568 pound-thrust] @ 290 lbs it is.
I feel so much like the Eclipse team, right now, it's scary! :-)

http://www.spectrum.aero/downloads/competitive_analysis.pdf
Competitive analysis Spectrum 33 vs. other Jets.

2 engines and... "4 passengers, NBAA IFR Reserves"

[300 nm]
617 lbs. is 84.1 gal ....0 hr+53 (53 min) = 99.6 gph/2 engines

[600 nm]
688 lbs. is 98.3 gal ...1 hr+41 (101 min) = 58.2 gph/2 engines

[1000 nm]
1,096 lbs. is 156.6 gal ....2 hr+50 (170 min) = 55.2 gph/2 engines

[1,600 nm]
1,647 lbs. is 235.3 gal ....4 hr+35 (275 min) = 51.6 gph/2 engines


Team MontJet

and just for "fun", how much would be the cost of a FJ33 ?

In article ,
Montblack wrote:

PROBLEM:
I only allowed 60 lbs for "Everything else".

Granted the S-33 is a 10 place jet vs the single seater MontJet. Still,
their "everything else" is DOUBLE the weight of their
wings+fuselage+engine(s).

The MontJet "everything else" is only 1/5 (21%) the weight of the
wings+fuselage+engine.

Hmm.....?

A) helium-filled inserts in the wing?

B) install only a pilot that is equipped with a large supply (self-contained)
of 'hot air'.

Montblack wrote...
Anyone out there with a PROVEN jet engine, with a fuel burn under
(Spectrum's per engine average)27 gph, that puts out 800-1,200
pound-thrust,
and weighs under 200 lbs?

15-20 gph* would be nice.

(* For 2 to 4 hour trips at 35,000-45,000 feet. Shorter trips will burn
more)

Otherwise: Williams FJ33-4A [1,568 pound-thrust] @ 290 lbs it is.
I feel so much like the Eclipse team, right now, it's scary! :-)


The Aviation Week SourceBook has a nice big run down of gas turbine engines
and manufacturers (along with everything else aerospace). I managed to
download the 2005 turbine section several months ago, but I can't find the
link anymore (I think it was direct from AviationNow.com). In any case, I
saved it and have uploaded it if you want to browse. There are quite a few
engines in the range you're looking at, mostly intended for drones.

http://www.togo84.com/spec05_gas_turbines.pdf

So... when does construction begin?


-Tony Goetz

Tony Goetz wrote:

So... when does construction begin?


And when are you taking orders? Need a test pilot? What about a web
master? :-)



--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

Robert Bonomi wrote:


B) install only a pilot that is equipped with a large supply (self-contained)
of 'hot air'.

No no...not the pilot, the OP! Plenty of overly warm, dare I say hot?
Why yes, hot indeed...air. :-)




--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

("Jack Allison" wrote)
And when are you taking orders?

As soon as I figure out how much a 2006 dollar will be worth at some
unspecified time in the future. :-)

Need a test pilot?

With a GOOD programmer, we should be able to fly off our hours in a sim. No?

What about a web master? :-)

Yes. Also, a pavilion tent at OSH. The web can direct interested parties to
the OSH display, while the OSH display will direct people to check out our
website for future updates.


Montblack

("Jack Allison" wrote)
No no...not the pilot, the OP! Plenty of overly warm, dare I say hot?
Why yes, hot indeed...air. :-)


With a ceiling of 45,000 ft ...no [ride ABOVE the] soup for you! g


Team MonJet