<span style="font-size: small">Irecently gota UCD .46. Installed some HS 475 HB's and a S3010, 6A BECwith2 s 2000 lipo,running a OS55AX w/ pitts style muffler and a 13X4 MASK-series prop. One of the pipes came off the pitts style muffler so Ijust covered it up temporarily to see if it would work, but Ithink it has way too much back pressure as it doesn't run the same.Ihad it mounted sideways withthat muffler. Iwill be putting the stock 55AXmuffler andsee whathappens. Ihave just put on the stock mufflerand mounted the 55 upright, see if it makes a difference.

Anyway back to my thoughts on the 55AX in this UCD. Ibelieve if your just going to do sportflying it has lots of power for it.It gets kind of windy where Ifly, and Ihave difficulty locking it into a nice stable hover without it climbing or sinking. The mid range on this 55 hasproven alittle difficult to tune being it hasonly 2 needles.

There isanother club member whereIfly and he has anOS91FX and a 16x4 prop. More than enough power but then gain he doesn't do much 3d, more sport aerobatics.Being able touse a bigger prop with the 91 gets theairframe moving quicker.

My current set up has me balanced at 5.5" with just 1 3/4 oz of lead on the firewall. Inverted requires almost no input on the elevator to keep her level. Plane is reponsive yet stable, slows to a crawl, you can pretty much land anywhere you want. She lands like a helicopter hehehehe. I'll try different CG's and see which ine Ilike better.

Iam leaning to a 70-80 size 4 stroke. Ithink the ability of swinging bigger props at a lower rpm will make 3d flight better than a 2 stroke on my UCD .46. I've been flying smaller electric 3d planes, and have gotten quite used to the way electrics fly. Imay convert this sucker to electric yet.

This plane is just a blast to fly in any wind conditions. Stable and responsive, landing is fun, it just crawls in. The amount of fun you can have for this price is unbeatable.

Aloha,
Les
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