Tfloyd

My Feedback: (6)

I was lucky enough to get my hands on a NIB GP Ultra Sport 1000 kit this week and am considering converting it to a gas engine. I don't have any experience with gassers so would appreciate any recommendations or potential issues with this conversion. There appears to be quite a few gas engine choices in the 20cc to 30cc range which I think is what would be needed to fly the US 1000. The US 60 is one of the best flying planes I've flown and I currently have one powered with an OS 75AX, it is an absolute joy to fly. I'm hoping to get another gem with the US 1000 but don't want to think about the cost of glow fuel to fly this plane - the reason for considering a gas engine. Your advice and recommendations will be greatly appreciated.

hrrcflyer

Tfloyd,

Evolution makes a 26cc gas engine which should be a good match for your US1000. The biggest drawback is the price. A new one sells for +/- $450.00. There are other gas motors in the 30cc range that are less expensive, but most of them have either a side or rear mounted carburetor which makes using them in the tight motor compartment of the plane almost impossible .

If anyone else finds another motor that will work, I'd like to know about it.

David

ggraham500

My Feedback: (4)

I really like the CRRC Pro GF26i v2 on my Carl Goldberg Wild Stick 120. I use a 17x7 APC prop. The 26cc electronic ignition engine is around $200 shipped via Valley View RC. Easy break in, easy starting, good power, excellent transition between idle and full power. Mine is a side-mounted carb, so if you don't mind carving your cowl a bit (Wild Stick does use a cowl), a pretty good choice. Very economical to operate. A DLE20 or a DLE30 would also be an interesting choice. I have the DLE30 already and a DLE20 on order.

But the CRRC Pro GF26i v2 was an easy first gas engine for me.

FentonFlyer

My Feedback: (11)

I think a converted Super Tigre 2300 would be ideal. Would take a little work get the engine converted, though. On the plus side, perfectly good 2300's can be had pretty cheap right now.

I just dont see how you could make a side or rear carb gasser work on a UltraSport...(cleanly)

Bax

My Feedback: (11)

Watch your weight!

With a gasoline engine, it's easy to add extra pounds to the airplane. We recommended only glow two-stroke or glow four-stroke engines, but even the large SuperTigre glow engines were getting a bit high on the weight. We flew that airplane with the old O.S. Max 1.08 FSR or the FS-120 Surpass-series of engines. It would fly very nicely on the 1.20 AX or the FS-200, as well as the FS-120 Surpass E or FS-120 Surpass III. Those engines will be quite a bit lighter than a gasoline engine.

Keep the airplane below 13 pounds, and even lighter is better. The designed weight range is 11.5-13 pounds. Get it heavier and you'll have a very noticeable degradation in performance!

Tfloyd

My Feedback: (6)

Thanks for all the information and recommendations. It looks like the US 1000 is not a good candidate for a gas engine. I'll probably stick with a quality 2-cycle engine such as an OS 120 AX and let the plane perform as it was designed. Again, I appreciate the advice which most likely saved me quite a bit of frustration in attempting a gas conversion that I wouldn't be happy with.

Tom

sgillmore

My Feedback: (50)

Sounds like you've already made up your mind, but here's another gas option. The SYSSA SAP-180 (30cc) is a great little motor with rear exhaust and rear carb...great for tight cowls. It's not as cheap as the Asian motors, but it's AMERICAN MADE and well supported. When comparing price, consider that the SYSSA comes with a rear exhaust pits muffler, ignition switch and stand-offs (in various lengths). Total engine weight is 40oz with muffler and ignition. I met Todd Syssa at Toldeo, very nice guy.

[link=http://www.syssaaircraft.com/]http://www.syssaaircraft.com/[/link]

There's also a very comprehensive thread on RCU here:

NEW SYSSA 30CC GASSER MADE IN THE USA
[link]http://www.rcuniverse.com/forum/m_8862472/anchors_8862472/mpage_1/key_/anchor/tm.htm#8862472[/link]

Tfloyd

My Feedback: (6)

Thanks for the info on the SYSSA engine sgillmore. I'll take a hard look at their 30cc engine. The price isn't really the determining factor, it's just that I had hoped to fly this US 1000 quite a bit and if I could do it on gas rather than costly glow fuel so much the better. If this SYSSA engine will fit in the nose of the plane and not be too heavy it might just be what I'm looking for.

Tom

jmohn

Take a look at the Saito 26 or 36 cc gas engines. They are expensive, but so smooth and easy to start/run. I just converted a plane to a Saito 36 cc gas engine and love it. Best engine ever!



Jeff

frenchie79

Good luck on the engine choice. If you have the time-please do a build thread on the 1000. Love to see it.

chevyman962000

My Feedback: (10)

I know this is old, but I was wondering if you ever built this bird, and what engine you decided on.
I have just acquired one of these kits also, and am thinking about going with gas, also, but not sure which one to go for.
I see HK has several 26-30cc sized engines for cheap, as well.