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

K&B 7.5 ducted fan engine

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Old 07-21-2004, 11:20 PM
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Default K&B 7.5 ducted fan engine

Would this engine work well with a prop? Could it be made to fit in a Patriot?

Thanks
Mitch
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Old 07-22-2004, 10:55 AM
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Default RE: K&B 7.5 ducted fan engine

Yes- I had run a Rev-Up wood 9x7 and a 8x10 Pylon prop. on mine..... Is yours F.I.R.E.? Many folks use this engine on deltas like the Whip or DD-

You could probably run it on a Patriot with some mods. but I would stick with an engine that can pull at least a 9x8 since the Patriot weighs 6-7 lbs. (Jett-50)
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Old 07-22-2004, 09:21 PM
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Default RE: K&B 7.5 ducted fan engine

this engine runs awsome with a 7x7.5 carbon prop.
really hauls the mail
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Old 07-22-2004, 10:24 PM
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Default RE: K&B 7.5 ducted fan engine

ORIGINAL: Razor-RCU


You could probably run it on a Patriot with some mods. but I would stick with an engine that can pull at least a 9x8 since the Patriot weighs 6-7 lbs. (Jett-50)
This is sound advice!
That K&B will not pull a 9x8 or a 9x7... and a plane like tha Patriot needs that!
Shok is right... the engine will probably SCREAM on a 7x7.5 (it should)... but that's an FAI pylon prop, not a Patriot prop!
So you need an engine that peaks at a lower rpm band than a DF engine...

Get a Jett .50... and an APC 9x7/9x8 prop... and a pipe... and go for 18,000...
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Old 07-22-2004, 11:02 PM
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Default RE: K&B 7.5 ducted fan engine

OK... I'm convinced. Right now it's a toss up between the Jett 50 or the YS 45.
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Old 07-22-2004, 11:07 PM
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Default RE: K&B 7.5 ducted fan engine

ORIGINAL: Rudeboy


That K&B will not pull a 9x8 or a 9x7... and a plane like tha Patriot needs that!

So you need an engine that peaks at a lower rpm band than a DF engine...

Get a Jett .50... and an APC 9x7/9x8 prop... and a pipe... and go for 18,000...
Or an engine that will turn the 9X8 in the DF power band...
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Old 07-22-2004, 11:56 PM
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Default RE: K&B 7.5 ducted fan engine

ORIGINAL: ChuckAuger


Or an engine that will turn the 9X8 in the DF power band...
OK You're right...
Now where's that .50 that turns a 9x8 at 24K...?
Don't get me wrong... I'd LOVE to get me one of those...
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Old 07-23-2004, 12:09 AM
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Default RE: K&B 7.5 ducted fan engine

The Jett-50 and YS-45 are my 2 favorite choices and I have both You will need to run a full-pi YS-

1. Jett-50 (I preferred the APC 9x9 on my Patriot)
2. YS-45 Macs 7.5CC (10x7)
3. West-50?
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Old 07-30-2004, 04:31 PM
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Default RE: K&B 7.5 ducted fan engine

Any Idea where I can find a K&B 6.5 or 7.5 DF engine? I am building an ancient Ziroli/Midwest He-162 from 1977. It calls for a Midwest RK-40 with a KB .40 engine.

I found the RK-40 on E-bay.
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Old 07-30-2004, 04:46 PM
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Default RE: K&B 7.5 ducted fan engine

ORIGINAL: Razor-RCU

3. West-50?
hey James, just got me a West .50 V1...........but no patriot anymore to try it in[]

ah well, maybe some day. here's to her!
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Old 07-31-2004, 05:07 AM
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Default RE: K&B 7.5 ducted fan engine

The 7.5 was on Ebay when I posted this. Id on't know if it sold. I ordered a Jett .50 today.
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Old 08-20-2004, 01:54 PM
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Default RE: K&B 7.5 ducted fan engine

Hey i could use the west 50 v1. If you what to part with it.
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Old 08-20-2004, 02:07 PM
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Default RE: K&B 7.5 ducted fan engine

I will trade you a YS-45 (no pipe) and an Irvine-46 for the west?
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Old 08-20-2004, 02:24 PM
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Default RE: K&B 7.5 ducted fan engine

i aint trading my Westy if you search through ebay UK, theres one for sale, cheap on there
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