Model Forum / Radio Controlled / Air Models / April 2004

Hi,
Yup, have thought of  a 4 stroke and would prefer to go that way. But here's
the unfortunate news in Australia. The cheapest I can buy a saito 150 for is
$749.00 or about $549 U.S dollars
Alternatively a Super Tigre g90 is $259 or about $190 U.S dollars. Tower
hobbies lists for $129.00
Or a O.S 91 FX is $444.00  or $325 U.S. dollars. Compare that to Tower
Hobbies listing at $199.00
Now what I'm really trying to find out is if the O.S. engine is $185 dollars
better. I know O.S. Engines and have had nothing but success with them. But
The G51 Super Tigre I owned was a good thing too. Just had a very fiddly
carb to set up. $185 dollars buys the servo's and Rx for the model.......

Ahh decisions.....

ANY info greatly appreciated!!
Regards
Shannon

Hi,
I have no experience with the larger Thunder Tiger engines but I do own a
GP15. Could never get it to run consistently. Piece of SH*T. So I stripped
it to see what the hell was going on and the lower carb body was cracked.
From new and was leaking air. Shop I bought it from is no longer (bust) so
...
Once bitten twice shy???
Regards
Shannon

Thanks.
I'm certain that the extra 300 would fly well on a 60 ish size.
Its just that I know its better to have a large engine working easily than a
smaller engine working hard. Sounds better too and gives you a better choice
of props..... Doesn't appear to be a weight penalty either.
Shannon

I bought my first OS the first since a 40 FSR in the early 90's, the 91FX,
last year after leaving OS engines for cheaper alternatives. I now think
that I have wasted money and airframes, broken by engine failure over
several years, by not sticking with OS.
The 91FX is a real beauty and worth every penny of what it costs in the UK.
(I'm guessing, but without looking, I would day that its more than half as
much again as the new chinese ST90)

It starts easily by hand, has oodles of power and is reliable as a good
wristwatch. ST have been telling people that there was nothing wrong with
their carbs for years, but they nearly all rich cut at low speed  although,
if you get one sorted, they are good engines. Part of the problem is that
their own istructions are downright misleading.

If its a valuable airframe into which you have invested time, the OS is by
far the best choice.

Each to their own, but I stand by what I say

Stu K

Thanks Scooter.
Here's how I feel about it... If I plonk down my cash on something I want it
to work. I don't want to have to spend MORE money on a further carb to sort
it out. Just seems crazy to me. I HATE, with a passion of two men, poor
design. Poor design is a sign of laziness and companies that just wan't to
take your money without consideration that you may want to actually rely on
the product to work...
In the words of Neil Young..... When I got it home it was a peice of
crap....

Shannon

Nah.... I was decided on the OS 91 but now I'm going to investigate a four
stroke. Probably a saito of O.S. 91... Decisions..
Shannon

Yesterday I talked to the guys at the field and the ones that use G90
were somewhat uncertain about the current quality of G90 engines so
I'll have to take back my recommendation. I know price is quite an
issue but if possible you should consider a 4-stroke engine -
something like a YS110 engine. A 4-stroke engine certainly has its own
issues but the reason that I like them is that they have a wider RPM
operating range and at low speeds, the propeller acts like a wind
brake. This makes landings easier especialy with a slick aircraft such
as your extra 300.