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

Rossi FIRE 61 5 port

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Old 11-28-2008, 09:26 AM
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freakingfast
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Default Rossi FIRE 61 5 port


This could be a great engine. It claims to make its power at 18K but 3.5 hp may be a bit optimistic. I wonder how it compares to a Jett in power. A bit cheaper than the Jett FIRE 60 LX HP but will it have the factory support and life of the Jett? I don't think so.

A Rossi and a 9X10 APC on a standard dust it may be insanely fast. Anyone want to give me the two engines and I will try to suffer through some testing for you


http://shop.vendio.com/RossiEnginesU...889/index.html
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Old 11-28-2008, 11:31 AM
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Default RE: Rossi FIRE 61 5 port

The Rossi 61 FIRE is still available from one or two places, a great engine, lots of power (but no lightweight). As a Rossi fan, I worry about factory support as the .61 no longer shows on the factory website, with the assumption no longer in production: It seems Rossi is concentrating on the car engine market. No new aircraft engines for many years now, and rear exhaust out of production for years. Personally I looked at the Rossi, compared it to the Jett, the support that I see Jett users get, notably on this website , and ordered a Jett 60 LX FIRE despite the higher price.

Not an easy decision I guess but, good luck!
P
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Old 11-28-2008, 11:43 AM
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Default RE: Rossi FIRE 61 5 port

In the .65 class how about this........

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Old 11-28-2008, 03:32 PM
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Default RE: Rossi FIRE 61 5 port

Hi!
No match for a modern engine like JETT or Nelson!
Rossis has been around for 30 years or more, looking the same. No development! Which is sad. heavy! But runs fairly well.
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Old 11-28-2008, 04:43 PM
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Default RE: Rossi FIRE 61 5 port

I like the Rossi's. They are well built but you will pay a weight penality. Also after a Rossi is good and run in, it will rotate freely when you turn the crank without the glow plug. Basically all of the pinch that it has when new goes with age and that may cause the liner to be bell mouthed hurting performance. I picked up a Jett SJ46 from 1994, even 14 years old it still has pinch left in the liner[X(], and killer compression

Back in 2000 a Rossi 45 2000, was $99.00, making it very attractive to buy, but now eight years later its double the cost[]

Larger engines are more still which makes the Jett products more attractive being very close in cost.

Its seems that increased costs on the Rossi's have seen my last Rossi purchase.

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Old 12-04-2008, 01:01 PM
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Default RE: Rossi FIRE 61 5 port

i wouldnt worry about parts from rossi etc. etc, the 65 variants has many common parts with the 61 engines, i just bought a .65 for 70.00 here on the site. as to losing the pinch, i have some rossi that seem to have no pinch at all and stll turn same rpms as new or better so not real worried. i havent blown rossi apart yet, so cant really get worried about it much, i cant see that being a issue as most extreme speed planes die from radio or structure failures or dumb thumbitis
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Old 12-05-2008, 08:38 PM
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Default RE: Rossi FIRE 61 5 port

According to an online calculator, it takes 3.79 HP to turn a 10x9 @ 18,000 rpm. The calculator says 2.7 HP for a 9x10 @ 18,000 and I'll bet a Webra .50 has got that covered.
The HP figures sound kind of high, but who's to argue?
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Old 12-06-2008, 12:04 PM
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Default RE: Rossi FIRE 61 5 port


ORIGINAL: freakingfast

A Rossi and a 9X10 APC on a standard dust it may be insanely fast.
But there are small block engines that will do about the same without the weight penalty, and less weight is less drag is more speed. Except perhaps in a terminal dive.. ;-).

How many ounces lighter is the small-block .60LX?

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Old 12-08-2008, 12:33 PM
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Default RE: Rossi FIRE 61 5 port

60LX is about 17oz with the muffler.

Rossi is closer to 23oz (I seem to recall)

Biggest difference....

Jett 60LX will be turning a 9x8, 9x9, 10x6 sorta prop

The Rossi is best off using an 11x7, 11x7.5, 11x8
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