Hey folks...I've got a 3W 70cc twin that's looking for a plane. I'm interested in the Wild Hare Ultimate Bipe...does anybody have any input on this combination ??

Edited 11/17

I now understand you are talking about the lighter 3w70iUS side carb version.

That engine will be nose heavy on the Ultimate. It will work but you may need to move the batteries to the rear along with rudder servos.

Another good choice for that engine is the new Cap 232 with the 91" wings. However after reconsidering if you plan for the balance issue this (Ultimate/3w70US) could be a very neat combo.


TF

Hi,

The 3W-70 twin weighs 4.95 lbs and is only slightly more than the 3w-50 or the 3W-75 iUS. Perhaps Tom has this older engine confused with the newer 70 rear carb singles which weigh a lot, or the newer 78 twin which is a heavy engine.

I have the same engine as you on a 33% pitts and it balanced fine. The plane flies like a rocket with unlimited vertical

Hope this helps

Elson

Several people have used heavier engines on the Ultimate and are very happy. It seems to me that this should be a good combination, I just wanted to warn the person about what to expect with the balance.

TF

Elson,
I was also considering a Pitts...what kit do you have it installed on ?? One of my concerns also, is whether the cowl will be wide enough to encompass the cylinder heads without having to notch them out.


Bruce

Bruce,

I have the GP pitts and I had to notch the cowl for the spark plug caps.

Elson

Tom,
Could I get an approximate inside measurement of the inside of the Ultimate cowl, oh, lets say....6 to 7 inches back from the nose ??

Bruce

The sides of the cowl are pretty much straight, whatever the F1 width is should hold all the way to the front.

9.25" will be a minimum.

Tf

Hey Guys:

I thought you might be interested, there's a new video of the Ultimate on our web site. This plane has a 3w56b2 twin on it, very impressive.

TF

Would a quadra 52 fit in the ultimate?

The Quadra would easily fit. You will need to cut the bottom of the cowl for the head, but you have to do that for all the singles anyway. It should be a pretty fair match. The Quadra is not one of the lighter engine designs but should not be considered too heavy for the application by any means. Consider tail mounting the rudder servo(s) to compensate, and try to keep any weight other than the ignition module aft of the front of the wing saddle. The inside of the fuse has a lot of room to locate components in.

Pat

Thanks for the reply, it is an older quadra and has no ignition module. I currently have it on Weeks Solution and it is pretty under-powered. The weeks was scratch built and is pretty heavy. I'm just looking around for a model to put it on. Does anyone know who makes a giant scale cub? I have a Hangar 9- 1/4 scale and i am looking for a bigger one for some local scale contests next summer. Thanks