That also means your high speed need won't be right, cambo. It is probably "lean" if you set it for max. with less opening.
Glad you found something....that's always good.

Cambo your close now. Thats about what I turn on a xoar. After a gallon.

Great to here!

Aerobob, that is what i was thinking. I am going to richen it up and see what numbers i can get.

The Cermark might come in at 11.5 with a Saito 91..

The Cermark plane is listed as 11.5 pounds with the SPE 40 in it. That engine weighs the same + - a couple ounces as a DL-50. A Saito 91 would make this plane extremely tail heavy, and extremely underpowered.

It will not work with a DL-50 on a 11lb plane. Period. Too much weight, power, prop, and in-balance.

I wouldn't choose that plane for this engine either but the manufacturer claims it's a 40cc plane and that it has a flying weight of 11.5 pounds with the SPE 40cc in it. Go figure!! Kinda like Aerobob's Obsession I guess. You know what kind of Edge I fly Nonstop.

Hey guys,

Just put another 6 flights on my Dl today and eveything was good with the exception of the stock muffler, i noticed a small crack starting to develop around the down tube this is my second muffer on this plane i think that Dl needs to address this issue. I ordered myself a new Jtec wrap around pits and love it, i did have a good amount of burble at midrange and it seems to be gone now with this muffler. I'm turning a Vess 23A at 6900 on the ground.

I'm going to give BOB a call about the muffler.

Here is a little tip. I strapped my sparkplug wire with a tyrap and didn't want to mess up the weaving on the ground, so I rapped it with white electrical tape befor I put the protective rap on. I've had it this way befor, and it works great!

Lou I'm gonna build that edge and I'll keep you guys posted on how it comes out. The spe 40 has 20 pounds of thrust and swings a 20x8 prop. I don't think that the dl is any more krazy on that plane than on a hanger 9 extra 260. Also, I will reinforce the firewall. I'm crazy not stupid.

I do not know. Watch for the final weight and caculate the wing loading. I bet the plane will have to be flown very fast to avoid stall. Because a bigger prop, trimming the plane will become difficulty...

We will see. That edge has more wing than AeroBobs obsession. I think it will be fun. I had a .60 to .90 size edge 540 with a .120 on it and it was great fun. I had to move the receiver battery almost to the tail to get it to ballance. But talk about a vertical rocket, and not to say an 80+mph plane. I love power.

Nonstoprc, I just did the wing loading calcs, and it came out at 23.26oz per square foot. I also figuered the wingloading with a weight of 14 pounds and it came out at 28.31 pounds. That ain't bad.

My Obsession with the DL is right at 25.6 oz/sq ft loading, and it has EXCELLENT slow speed envelope performance. Overall, needed 3.2 oz of tail weight to obtain same CG as with the OS 1.60 and pump/header/pipe setup. It ain't a "floater" by any means, but certainly it doesn't handle any *worse* than my other heavier 30% airframes.

It's enough fun that it makes up for any sluggish handling, if it has any.

Aerobob what do you think of my choice. That edge should be great, I think.


http://www.cermark.net/Show.php?TID=80&PSN=1663

Use a GOOD throttle servo, a BETTER throttle linkage, absolutely a KILL switch, reinforce stuff properly, and HAVE FUN!!!!!!!!!
I thought the Obs would be a pig, but it has become a HOOT. I don't do stupid, crazy stuff with it, and really work to NOT overstress the airframe.

Risks of overpowered and overweight airframes pop up when we "forget" what we're flinging around the sky..... just be on top of it every minute, you will have fun.

Except for the prop-breakage-risks..... [:'(]

10/4 bob I agree. I wouldn't push that plane to hard. But I think it would be fun.

DL is 59.8 oz.... SPE 40 is 54.2 oz.... ain't enough difference there to justify going with the 40.

1140 squares may be a bit small, obviously, but you know what you're getting into..... Do a *real*, REAL good job of hinging, and a better job of control takeoffs, pushrods, and servo mounts... you'll be fine.

Well, I would get a 28% scale, for example Wildhare extra or edge, for DL-50. The price difference is minimal comparing with the Cemark Edge.

23.6 oz/sq. foot is moderate. I have to admit, but stick to my opinion that the plane will be on th heavy side after beefup (even it is doable). Normally a 40 cc airplane is not built/designed for 50cc engines. Some other factors to consider: a longer landing gear for prop clearance, whether the cowl will clear the engine, using MG servos etc. All these add weight.

Flight trim is another concern.


There are stronger and ligher 40cc gassers on market. But that is another choice.

My edge 540 was 32oz per square foot, No problem.

Well I guess if you get into an upscale 28% you also have to jump up the servos, batteries, etc. Let's be honest, the greatest thing about this engine is the price so if folks can find a way to deploy it inexpensively all the better. I can see both points of view and have stated my opinion on the choice of planes but it's Paul's choice. He's the only one that has to fly it. You do however need to be careful. We have a guy at our club that loaded the batteries in the tail of an ultra-stick to compensate for an over-sized engine and when he pulled up from a blender the fuse broke just forward of the batteries. Luckily everything stayed together enough to get it on the ground but only by the skin of his teeth. Let us know how it turns out Paul. BTW That wing loading thing should be used to see how well an airplane will fly, not IF an airplane will fly.

Yeah, I don't think It would fly well with a Saito. But, I bet a Big Gulp that that plane will be nowhere near 11.5 lbs with a SPE 40. You should buy a lottery ticket if you can get it under 15.

That Edge has similar dimensions as the old H9 Edge...and also has a very similar profile. The H9 was 12.75 lbs with an OS 160. It will probably fly as good.

There will be a video for sure. Down in flames or not. I fly on a private field so no one will be around to get hurt.

We'll see!

Well don't be too surprised. Cambo, and a lot of other folks are flying the GP CAP 232 with a 79" wingspan and a DA or DL-50 in them at 13.5 pounds AUW. Again, a 40cc plane but it flies great with the 50 in it. It's just going to depend on the plane and how it's built. My son bought a Pitts S2B from Cermark and it was a really well made ARF. Odds are this one will be too. Just doesn't pay a dealer to put crap out there with RCU around. Everybody in the world finds out the next day and they can't get rid of the things. I love it!!!!