Engines FORA40 for Pylon Racing

[Stasf2d]

RPM - 20500 with propeller - 222x178mm or 8.75 x 7 inches on the fuel - 10% Nitro, 20 Castor Oil, 70% - Methanol;
weight with muffler - 385Gramm;
www.chornyy-f2d.lviv.ua

[daven]

It is not new, and those numbers are not impressive compared to a Jett/Nelson.

[Stasf2d]

It is not new, and those numbers are not impressive compared to a Jett/Nelson.

- Perhaps it is information according the first prototypes of engines. With the second generation of engines were made experiments and the phases of gas-dynamic were changed. For comparison it was taken new Nelson, which turned on the stend maximal 20300 (Fora turned 20500) in one time, with one prop and fuel.

[DaveSawers]

That's the Q500 motor right?

I couldn't find any information about this motor on the web site link you posted. Where could I get one and how much?

[Stasf2d]

That's the Q500 motor right?
I couldn't find any information about this motor on the web site link you posted. Where could I get one and how much?

- Yes, it is Q500. There is legende, that 2 Racers had an argument. One of them told, that Nelson is the best engine in the World. And the other pilot told, it was possible to make like engine, but a little bit better. You can find the price on the web-side here down.
http://pages.prodigy.net/gcleveland_grsmodels/_import/pages.prodigy.net/gcleveland_grsmodels/index3.html

[Stasf2d]

By the way, if the Nelson muffler fit to the Fora 40, which is passes, the result was reached 20700, with 3 shims for head. As a rule on the motor were put a lot of shims for reserve.
According to the argument, this story was heared by one hot guy, which decided to realize this argument.

[Stasf2d]

The story with argument about engines ended so, that there were produced 100 engines, but the pilots didn't have enough flying practice and were not able to definite the difference between the engines, because they used only 60 -70% of power.
The most interesting thing is, that the main quantity of engines were bought by collectors and some amateurs.

[daven]

Several of those motors hit the US a year or so ago. A few friends of mine tested them, and compared to the Nelson .40 that they normally flew. The stock muffler was garbage, and even with the Nelson muffler attached it was well over 1000 rpm down. One redeeming feature was that the engine was quite light compared to a nelson, but with the new weight changes in Quickie, that isn't a concern anymore. Also, with the new Nelson LS coming out, I don't think this motor has a chance. Its too bad, I would like to see a little more competition, but the nelson is very tough to beat.

[Stasf2d]

Several of those motors hit the US a year or so ago. A few friends of mine tested them, and compared to the Nelson .40 that they normally flew. The stock muffler was garbage, and even with the Nelson muffler attached it was well over 1000 rpm down. One redeeming feature was that the engine was quite light compared to a nelson, but with the new weight changes in Quickie, that isn't a concern anymore. Also, with the new Nelson LS coming out, I don't think this motor has a chance. Its too bad, I would like to see a little more competition, but the nelson is very tough to beat.



- Is it possible to know more exactly, what parameters of engine are "too bad"?
The practice shows, that all depends on the competence of users - pilots. I have often such situation, when the people don't have enough information and knowledges, but make some decision without having learned the question to the end.
There is also the opinion, that the relative popularity of engine is connected with the stereotypes, which are introduces by the best pilots in Q500, which perhaps have own interests.

By the way, the Fora company makes to the 15.of March 2007 free service for Fora40: the first and second generations.

[daven]

I did not say the engine was "too bad". I said it was too bad that it wasn't a better engine, I would like to see more engines available that are competitive.

If the engine was at least a little more competitive I would buy the stereotype comment, but this motor was significantly less powerfull than the Jetts or Nelson currently being flown in the US. Free Service is nice, but what is the point if you can't win a race.

[Stasf2d]

Do you plan to fly intensive in Q500 this year ?
Perhaps the Fora40 was not enough regulated and also not enough flight around. And it was compared with the most successful exemplars from Jett and Nelson engines, and perhaps with good flight around.
What engine will be the leader in this year?

[daven]

Yes Stasf2d, I fly quite a bit. I traveled across the U.S. in 2006 to many races. At least 8 that I can think of off the top of my head outside of Minnesota. I won't make as many races this year because of a recent move, and job change, but I still hope to make a few races. I've finished in the top 5 at the U.S. Nationals against the best in Q500, and have had other good showings across the country, all with Nelsons.

The "new" nelson LS will be very tough to beat from what I've heard recently.

[Stasf2d]

Does it mean, the Nelson has no competitors? It is not interesting. It means, that Q500 is very onesided and the engine is very solitary and without intrigue in the competitions. The engine doesn't have the oponents, whom it can compete with.

[daven]

The Jetts can be competitive with the Nelson. I've never run one, but about 5-10% of the racers do, and do quite well. The primary knock on the Jetts that you hear is that they are just as fast, but can be a little more finicky in terms of needle settings. The Texas Guys have it figured out, and a few others, but the Nelsons tend to be a little more consistent.

[Stasf2d]

What maximal high place could occupy the pilots, who tried to fly Fora? In Russia this engine is very popular. They can not compete as racers, but they tell, that the engine has enough power resource, and it need a lot of flying to realize this resource.

How many racings can the popular engine fly?

[daven]

I've put well over 200 heats on a single piston / sleeve.

[Stasf2d]

What problems does have these popular engines in Q500.
Is there any garantee service in these engines?
Really can the engine work about 20 hours without interference (it is day & night without pauses).

[clb75001]

Intesting post, Stas.
But for Q500 races we need only 2 minutes of "engine work".
And if less the plane is faster.
Claude.

[Stasf2d]

Once we made tests in sparing regime on the stend, but on the plane in maximal regime it begins to add too much evolutions in flight and it's recourse reduces in ariphmetical progress to 2 hours. I saw in the training the Racer fly 4 minutes. Apropose we made not big batch of engines. And all engines which were bought from me in this year and which lose their resource, can be changed for the new engines or if the engine was bought in the past year, the new engine can be sold now with 50% discount.