A while back I was looking at the single with 503 too, but I also kind of wanted the 150Vne upgrade for the extra strength.
It looked to me at the time like it was going to come out a little heavy for the 503 with that option even if I built everything else stripped to the max (i.e. not even any electric start).....
What was the weight of yours and what options etc.?
Just curious. A 503 single is another one of my fancy dreams along with the II S/2200 and all the other permutations I kick around in my mind ;) Mostly because the 503 is my favorite motor and I'm always looking for ways to fly one again...
LS
--- In Titanaircraft@yahoogroups.com, guy truex <airbosss@...> wrote:
>
> I had a Titan single place with a Rotax dual carb 503 that took me all over the US. I could always count on at least 100 mph, although most people won't believe it. I also flew other Rotax powered single seat planes on long cross country flights. The prototype had a Rotax single carb 447. It was good for about 80- 85 mph cruise. The others were powered by Rotax 503s. They would go at least 100 mph all day long.
>
> I delivered Roger Bacon's first two place Titan to its new owner in Texas. It was powered by a Rotax 503. I had my 15 gallon fuel tank strapped into the back seat. It would do about 95 mph. I took it from Germack Airport (Geneva, OH) to San Antonio, TX. That trip took a day and a half.
>
> I have flown many Titans powered by 4 strokes. They are fast and climb very well, although the Rotax 503 does the job just fine. By the way, I haven't had a 503 fail since the late 80s when they had a mechanical points ignition system.
>
> If you go with the Rotax 503, change the plugs a little more often if you use 100 LL. I ran good 100:1 oil and mixed it 100:1 myself- no oil injection. Don't count on flying much over 12,500 feet. The mixture gets a little fat up there and the 503 runs out of power.
>
> Keep the build light. It'll work.
>
> If you want a bunch of heavy stuff, get a 4 stroke.
>
> The 3300 would be an extreme single seater... could be fun.
>
> -- Guy
>
>
>
> ________________________________
> From: David <davidshirar@...>
> To: Titanaircraft@yahoogroups.com
> Sent: Sun, November 15, 2009 3:41:54 PM
> Subject: [Titanaircraft] 2 stroke engines
>
>
> 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]
>
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