Sorta like - you're hungry, and you come upon two sandwich shops next to
each other. One is empty, the other has a line out the door. Without
knowing anything else - which one makes the better sandwiches?
I brought this up because I wanted to point out that he will have a lot
of trouble finding a used Jab 3300.
ls78705 wrote:
>
>
>
>
> --- In Titanaircraft@yahoogroups.com
> <mailto:Titanaircraft%40yahoogroups.com>, Jim Covington <jim@...> wrote:
> >
> > "thinking if i should save and just buy a second hand Jabiru 3300"
> >
> > I'd say "yes" except that owners like them so much there are very few
> > for sale.
> >
> > On the other hand, you'll find far more used 2-strokes for sale with
> the
> > phrase "no longer needed; upgraded to a 4-stroke." Draw your own
> > conclusions.
> >
>
> I wouldn't say this is a good metric to follow, actually. Some of the
> reasons for going to a 4-stroke aren't good ones. A lot of folks go to
> a 4-stroke simply because they think they need to. They get talked out
> of the 2-stroke, believing some story that it's going to seize and
> kill them, even tho they hadn't really had trouble with the 2-stroke
> in the meantime and it's already a suitable engine for the plane.
>
> Other times, the 2-stroke is abandoned because it's simply too small.
> This is the reason I have ended up flying a 912 - my favorite engine
> of all time, the rotax 503, simply isn't big enough to power the size
> of plane that I currently need, so I've had to go to one fitted with
> the 912.
>
> In other cases, fuel consumption is a reason (2-strokes are thirstier
> than equivalent 4-strokes).
>
> So it's not always just reliability or even suitability.
>
> As for the titan, tho, by and large the Jab and 912 series are the
> main engines used on it. This is generally because most of the models
> are too big to use the popular 2-strokes on them and the 4-strokes end
> up being the best options overall.
>
> I personally wouldn't fly any other 2-stroke but the Rotax 503, 582 or
> 618. My preference among these 3 is far and away the 503 (my favorite
> motor ever which I flew for about a decade). But at 50hp, it's
> borderline even for the single place titan unless you build it fairly
> light. The 582 isn't as reliable (crankshaft is weak spot) and it's no
> longer really financially practical anymore ($6000 new just for the
> engine). The 618 is no longer in production.
>
> So really, for the titan, by the time it's all said and done, the most
> practical options in the end are the 4-strokes, the Jabiru and the
> Rotax 912 series.
>
> My experience with the titan is all with the 912ULS that came on the
> plane when I bought it. So far it's been a good engine and hopefully
> it'll stay together out to its TBO (1500 hours) at least. If it
> survives that long, it will have been a good deal.
>
> LS
> >
> > David wrote:
> > >
> > >
> > > Hello group. for the time being im just looking around online trying
> > > to find the right combo for when i try to build. Ive figured ill
> build
> > > a titan, probly a single place for my first plane. As you know a huge
> > > range of hp options applies in terms of engine selection and im not
> > > firm on whether to go with a 4 or two stroke. obviously a 2 stroke
> > > motor has a bunch of problems with reliability. but for cost sake, 2
> > > is the way im leaning. now ive found plenty of 2 strokes out there
> > > that have claims of reliability or power to weight stats that seem
> > > great, ie.: rotax, hirth, siminoni. these three are the ones im
> > > looking at. Im finding their claims, except for rotax, which i think
> > > is at the lower end of my needs for power ( hoping for about 100, or
> > > more hp), well, ill say, a little unbelievable. and ive read mixed
> > > forum reports which say im correct in this assumption. However, since
> > > you guys fly titans and im gonna build one, can someone please, if
> > > youve had experience with some of these power options be frank about
> > > your, or ohters you know, experiences with them? Your candidness can
> > > go a long way to making my decision. ( thinking if i should save and
> > > just buy a ssecond hand Jabiru 3300).
> > >
> > > Thanks
> > > David Shirar
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
[Non-text portions of this message have been removed]
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Titanaircraft/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/Titanaircraft/join
(Yahoo! ID required)
<*> To change settings via email:
Titanaircraft-digest@yahoogroups.com
Titanaircraft-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
Titanaircraft-unsubscribe@yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
No comments:
Post a Comment