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

The Jett 90 is a beautiful thing.

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Old 10-24-2004, 11:05 AM
  #1  
Bob.R
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Default The Jett 90 is a beautiful thing.

I know there are many Jett lovers on this forum, so I thought you might like to see some pics of my latest project. Dub set up the Jett FIRE 90 to turn an APC 10x10 at 16K. The air frame is about the size of a 45 pattern ship but with a fairly long tail moment to balance that big hunk of aluminum up front. 52" span, 580 squares. Spring air retracts. The styling is intended to capture the look of some of the classic ballistic pattern models of the 70's and 80's. It's not a pure speed ship, but it should be fast and smooth, I hope.
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Old 10-24-2004, 11:10 AM
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Default RE: The Jett 90 is a beautiful thing.

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Old 10-24-2004, 11:32 AM
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daven
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Default RE: The Jett 90 is a beautiful thing.

Thats a beauty. I mean both the plane and engine.
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Old 10-24-2004, 12:53 PM
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Ian.W
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Default RE: The Jett 90 is a beautiful thing.

[X(]
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Old 10-24-2004, 01:18 PM
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Default RE: The Jett 90 is a beautiful thing.

Really nice looking plane and engine. I have the 90L. Keep us posted with pictures and flight performance in the future.
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Old 10-24-2004, 04:28 PM
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Harry Lagman
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Default RE: The Jett 90 is a beautiful thing.

Bobber, nice ship - that's exactly the type of "next model" project I've been thinking of. I have recently enjoyed my first "Jett .90 Experience" (in a GP Toni) and let me tell you, you WILL attract lots of attention at the field when you fly it!

Good luck with the project.
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Old 10-24-2004, 07:13 PM
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Default RE: The Jett 90 is a beautiful thing.

That plane has really nice lines. Jett engines are real screamers that look good too!
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Old 10-24-2004, 11:05 PM
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Default RE: The Jett 90 is a beautiful thing.

A "Jett" in ANY plane, makes for an awesome combo!!

Let us know how she does!

...and I'd bet....she WILL be "fast and smooth"!

Gary
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Old 10-25-2004, 08:12 AM
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Default RE: The Jett 90 is a beautiful thing.

that thing is .......... let me find the right word here................. sexy

Can't wait to see it completed!

Bob
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Old 10-25-2004, 12:47 PM
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Default RE: The Jett 90 is a beautiful thing.

How does that Great Planes Lil Toni fly?? How well powered in is with a Jett 90, and what would the top speed be?
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Old 10-25-2004, 05:35 PM
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Default RE: The Jett 90 is a beautiful thing.

Ditto.
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Old 10-25-2004, 05:49 PM
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Default RE: The Jett 90 is a beautiful thing.

That is one sweet combo!

I also am interested in the GP Toni. Although it's not a Jett, I do have a Rossi RIRE 90 and have wondered if that would squeeze in the Toni. How bout it Larry?
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Old 10-25-2004, 07:27 PM
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Harry Lagman
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Default RE: The Jett 90 is a beautiful thing.

Kaos, Mustang and Strega, the Toni is a great platform for an engine like a Jett .90. It's not the fastest airframe out there but for its size, it's pretty good.

I have the .90L version (non-BSE) mounted with cylinder to port (Jett Stream exhaust sits on top of left cowl cheek). This was done to avoid the problems with the exhaust fouling the fuselage with the down/right thrust inherent in the kit.

The guys at Jett Engineering have fabricated an exhaust header spacer now so the engine can be mounted in the more conventional cylinder to starboard config (as per the kit instructions).

Re the RIRE Rossi - on the Jett .90, the backplate screws are about 1 1/2 inches in front of the firewall. For the exhaust routing, I believe Bob27s has been involved with an R.E. installation in a GP Toni. Bob, how did that go? That Rossi would be an awesome powerplant I would expect.

I run an APC 12x8 on the Toni. It does 13,200 rpm static (just into the low part of the .90L's powerband) and unloads a lot in the air. I estimate speed to be between 100 and 120 mph without wheelpants fitted. Other guys reckon more but I'd rather call conservative. I will need to radar the thing and try 11x8, 11x9 and other props one day soon. It's got great vertical too - I can pull up to vertical from a level flight speed pass, apply full aileron (I don't use high rates on this model) and the roll rate will appear to be constant (not slowing down) for as long as I have the courage and visual acuity to keep climbing to near invisibility.

The engine just wails - there's no mistaking it when it's in the air!

Hey, would I qualify for revver brotherhood with this config?
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Old 10-25-2004, 07:52 PM
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Default RE: The Jett 90 is a beautiful thing.

Harry, Definately try the 11x8 and get the RPM up a bit. Let us know how it goes.
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Old 10-25-2004, 11:31 PM
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Default RE: The Jett 90 is a beautiful thing.

A Jett .91 powered Tony should be about 120+ mph machine. At the last rule cycle, I proposed a racing class based on Formula One (Goodyear) designs using 15cc engines (.91) and 750 sq. in. wings with a maximum wingspan of 64". Although it got hung up with vote of 6 for and 5 against and did not pass, the rules are being examined to simplify and will be submitted again. You can see them at:

http://www.rcpro.org/html/rules/form...la_1_sport.htm

Scale racing with fast sport airplanes.
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Old 10-26-2004, 12:20 AM
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Default RE: The Jett 90 is a beautiful thing.

I love that Lil Tony from Great Planes.. Reminds me of the old Formula 1 Pylon Racers but a lil bigger.. I'd like to try and get 150mph out of one of these Lil Tony's.. Anyone got any idea's how I could get that?
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Old 10-26-2004, 01:08 AM
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Default RE: The Jett 90 is a beautiful thing.

To increase the speed of a GP Tony, from 120 mph to 150 mph would require double the horsepower. 150/120 = 1.25 increase in speed. Cubic function to determine required power increase gives 1.95 the original power. So it would take about 5 hp if the Jett .91 has 2 1/2 hp.
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Old 10-26-2004, 01:28 AM
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Harry Lagman
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Default RE: The Jett 90 is a beautiful thing.

Strega, buy the kit - it's one of the easiest ARFs to assemble and it flies like a docile sport model. It's easy to land too.

It's a typically well made GP ARF kit.
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Old 10-26-2004, 04:37 AM
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Default RE: The Jett 90 is a beautiful thing.

Hey bobber
That is an awesome looking plane - would think it would turn up real nice, any thoughts on a plan release
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Old 10-26-2004, 08:00 AM
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Bob.R
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Default RE: The Jett 90 is a beautiful thing.

Thanks to all for the compliments on the airframe - I'll post more pics as the build progresses. I'm trying to wrap it up in the next 6 to 8 weeks, but with work and the holidays, that could slide.
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Old 10-26-2004, 08:04 AM
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Default RE: The Jett 90 is a beautiful thing.

Hey bobber - is this your own desing, or was it kit?
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Old 10-26-2004, 10:11 AM
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Default RE: The Jett 90 is a beautiful thing.

Squid - it is my own design, sort of. It is basically a scaled down pattern ship. Styling is borrowed from Curare/Tipo/EU1A.
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Old 11-12-2004, 06:57 PM
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Default RE: The Jett 90 is a beautiful thing.

Just a quick update. The lost-foam nose has been shaped, wing fillets added, and the fuselage glassed. It is in its ugly duckling phase with the microballoon camouflage look. I've had to set the project aside for a month or two, so it looks like early next year for completion.
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Old 11-23-2004, 06:21 AM
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Default RE: The Jett 90 is a beautiful thing.

Hi

I have been looking for a decent 90 size motor to power a pattern ship. Had my eye on the Rossi but they only readily available up to 60 size. Would a 90 Jett be suitable for conventional pattern or would this be an application mismatch. The 'normal' engines out there are just 'so normal'. Rather have a Dodge Viper than a Mustang

regards
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Old 11-23-2004, 07:38 AM
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Default RE: The Jett 90 is a beautiful thing.

I have one in mine.
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