Peak Models 32% Extra 330 SC

[Xpress]

Thing is this fellas, we've all been there. And most of us still are. I love 3D and have gained a great amount of skill over the last few years. But there is one thing that stops me from doing like so many of the really good pilots do. The older I get, I have learned that I can do pretty much everything up high. (The money safe) But I know for a fact that if I do down low what I do way up high, my money safe quite possibly could go bankrupt. LOL

The closer to the ground you are the less distance the airplane has to fall

 

[Snoopy1]

With the 72 up front what do you expect the weight to be with that engine.

 

[49dimes]

With the 72 up front what do you expect the weight to be with that engine.

Overall the same. Will lose the additional weight (custom battery tray) that is over the engine now. Batteries will get strapped back to the sides of the motor box. The 72 is about 3/4 pound heavier than the 50.

 

[49dimes]

Alien performance upgrade showed up today . I like the new smaller footprint and wide voltage range of the RCAME ignition too! The HV lead has a smaller diameter as well and is much easier to manipulate around tight spots. The plug cap is 10mm so a nice snug fit with a CM-6 plug.

 

[49dimes]

So I finally got off me duff and started the engine change out. Been talking with a friend via email who has two of the 72's. He is currently flying one of the two in an EF91 Extra. Reports are positive but the second engines ignition was faulty (RCAME). DJ has come out with a new ignition for this engine. Had a picture of it but I forgot to save to my computer . Looks similar to the MSR ignitions made for MVVS.
So looking forward.....I'm looking at going from 5.5hp to 7.5hp to haul a 20 pound plane . Looks as if it will be "Drop In" ease .

Oh! The 72 will be getting the same filter / velocity stack treatment as the 50 has. This has been a great asset keeping the internals of the plane nice and clean and keeping the internals of the engine from wear due to dust and debris. To date the Alien has 32 flights of about 7 minutes each.

 

[stangflyer]

A little extra power never hurt anyone, right?

 

[49dimes]

A little extra power never hurt anyone, right?

Nope. Not that I'm aware of . A 70cc class engine is best suited for this plane and to be honest the cowl was designed for a 70cc twin.
I'm very pleased with the DL50 however and am really looking forward to getting it mounted back up to the Pilot Extra. That plane is going to have "Insane" power at tap. Sould fly like my 3D foamies . From the reports I have read the 72 should get the Alien very close to that as well .

 

[stangflyer]

Nope. Not that I'm aware of . A 70cc class engine is best suited for this plane and to be honest the cowl was designed for a 70cc twin.
I'm very pleased with the DL50 however and am really looking forward to getting it mounted back up to the Pilot Extra. That plane is going to have "Insane" power at tap. Sould fly like my 3D foamies . From the reports I have read the 72 should get the Alien very close to that as well .

Yee ha! It's good to go vroom vroom with foamy performance in a dino juice powered 'frame. Bring it on.

 

[Snoopy1]

Power wise you are going in the right direction. From my experience which is not a lot in 3D but but have done a lot building and changing. The following rules for 50cc apply 16 lbs ok but no more 14.5 lbs great and 12 lbs way to light. My next 50cc hopefully will be around 13.5 to 14 lbs I belive that will be just right for all round 3D flying.

 

[49dimes]

Got as far as getting the 50 off the airframe and installing 3/4" inch stand offs. This will put the spinner back plate about 1/8" off the cowl.
The difference in weight of the two engines is 6.8 oz.

The battery tray I made weighed 5.2 oz. Putting both batteries back to the left side of the motor box should make it a wash as far as CG goes . I also got some side by side shots of the two engines for those who may be interested. Fit and foot print are " drop in". Will have to re configure choke and throttle control rods. The up down position of these controls on the new engine are reversed ie...Choke rod on top, throttle rod on bottom.