I'm thinking about getting a Dave Patrick Extra 330L and I'm trying to decide between a ZDZ 40 and an OS 160. I'm guessing the OS would require a 24 oz. tank, but then I'm afraid the ZDZ would land it too hot. Also, are the hinges that it comes with ok or should I use Robart Hinge Points. Pictures of your completed airplane are also great to....

If you plan on 3D flying the OS 160 just has not got the torque,

Go with a da 50,you will have loads of fun!

Get the Edge 540T. I just got one with a Moki 2.10. Awesome ARF. Those hinge points that come with it are even better than the Robarts IMO.

Been flying mine for 7 months now with a moki 2.10. The hinges that come with it are fine.
The moki 2.10 is the perfect glow engine for 3D with this plane. It keeps the plane light and
has plenty of power for 3D. Just don't go full throttle on the downlines. Then again, you shouldn't do
that with any scale aerobatic plane/engine combo. The 1.60 should be enough based on the latest review
in Model Aviation. However, if you go with something like a DA or ZDZ 50 you will have a much better
selection of other 3D planes for that engine if you ever tire of the DP extra. The only problem with a DA
50 on this plane is that you will be adding a pound of weight over the moki or O.S. 1.60, which will increase
the wing loading. It will still fly well with the DA 50, but 3D performance might be degraded to some extent.

Greg

You could but the zdz roto 35. That engine is actually recomended!

I was doing the same as you a little while ago. After trailing around all the forums and asking around I decided to get the Edge too. Also, the general view was to fit a gasser, so I got a BME 50 even though I already had an unused Moki 1.80. Like Columbo says, by the time you get the ignition and battery in there it'll weigh at least a pound more than it would've with the Moki, but, the gassers are real cheap to run, reliable and long lived. If you decide to get a gasser, get one with radial mounts, like the ZDZ. I overlooked this and now have to carry the weight of a Du-Bro Vibe Mount too!

Can't tell you how it flies cos' it aint finished yet! Couple of the guys here say they're great even at 15 pounds. There's a video somewhere of Sebastiano Silvestri flying one with a BME in it. It's cool. Anyone got the link?

Hope this helps,

Gez

The OS will do fine on even 16 oz or 20 oz. I flew it on another plane w/ a 24 oz tank before and the flight lasted like 20 minutes.

If you get the OS 160, make sure you get the Jett Turbo In-cowl muffler, as it provides adequate back pressure and some power boost. Swing a good 20x6 prop at 8000 rpm and get 20 lb of thrust. Keep the plane at 13 lb. It will do the high-alpha thing better than if you were at 15 lb.

Many OS 160 users, including me, don't realize the full potential of the OS 160 until a 20x6 prop is used. I used to run like 18x6 @ 9k or 18x8 @ mid 8k, which does not give the most thrust on this motor.

I had one with a taurus 52! It was incredible at 3D. I would go nothing less than 50cc. It had just the right amount of power for 3D. Hover at 1/3 throttle. That was an incredible plane. same old sad story but I lost it due to radio problems. []
willy

3-D, you might have had ignition noise from the gas engine. One more benefit of the glow engine.

I have the DP Edge 540 and have been flying it for a little over a year now. The Edge is not much different than the Extra. I flew it with a Moki 2.10 for the first six months then swapped it out for a ZDZ 50. I flew the plane with both engines for about six months and I can say I like the ZDZ 50 a LOT better. I also have smoke on the plane. I actually had to rebalance the plane when I put the ZDZ 50 on it because the Moki 2.10 with on board glow was heavier. You have to realize with a gas engine you will be using a lot smaller fuel tank and flying a lot longer on much less fuel. The benefits are:

- A lot more power
-Uses much less fuel
-No glow gew mess to clean off the plane
-More reliable
-No more going to the hobby shop to buy glow fuel (and you will be there a lot if you go with a Moki 2.10) just stop by the gas station on the way to the field.

Either engine will fly the plane fine but in my opinion, someone who has tried both the ZDZ 50 is the way to go hands down.

What fuel are you running, and what size tank does this airplane have? Now and days, I run YS 20/20. I also usually aim for around a comfy 15 min. flight time. Twelve to fly and a little extra in case I miss an appoach or have to wait in line to land. And can I do without the Jett Muffler and just go with one from Slimline?

What about using a Brison 3.2?

I've owned a DP extra with a Sachs 3.2 (heavy) it still flew good. Members of my club have flown Dave Patricks with the following motors, ZDZ 40, Taurus 52, Poulan 46, and a Husky 45. So a brison 3.2 would fit right in, infact a Brison and a Taurus aren't that different, both based on a Sachs.

If you pick up the latest issue of Model Aviation, there's a nice review of a DP Extra powered by an OS 160. The reviewer said it was plenty engine for 3D. It also had a pitts style muffler that looked trick with it's chrome tips, made just for that DP Extra. Very nice model.

Mike

...

I have a DP Extra, brand new and in the box. I will be using a Laser 240V twin glow engine. Bought the plane in January, and hope to get it put together soon. To me, this particular plane is just about the prettiest thing out there! If you check out the http://www.3dbatix.com/videos6.htm site, you will find a Zak West "Part 2" vid that isn't shown on the Dave Patrick site. Of all the planes I have/had, this is the one I have most desired to own!

Mike.

Hey Ben,

I used a OS 160 in mine and it does ok. I sold it to a friend and he is using a Moki 210 and it flys it with authority. Zac West also used a Moki 2.1 in his and it hovers fine and still has good pull out. It's not as expencive to run as you think. You only run .it on FAI fuel and that comes by pretty cheap like 12 or so dollars a gallon.

I had my old midwest cap layin around and put a Moki 1.8 in the nose. It's slightly bigger then DPs Extra and weighs about 14 lbs and that flies that perfect. Dont forget the Moki has over 4hp, and is very light!!!

Just my suggestion..

Later,
Frank

I got a Moki 2.10 on my DPM Extra, hope to maiden it next week. It's been converted for a pull-pull on RUD and ELE. Any advice on the minimum torque for the servos, I am going to fly IMAC only, not 3D. Will 5645s do on the ELE?

On the elev. that should be fine.5945 would be better though,since your doin both elev. halves.

Later,
Frank

At your elevation a 50cc gasser is going to give you the performance you are looking for. The OS may be a little weak at altitude. With a gasser you can run a smaller fuel tank. I had a DP Extra with a Moki 1.8 and it would just barely pull out of a hover at sea level. I sold it to someone who put in a 50cc gasser and while the plane was a little heavier, it did fly better. The plane snap rolls weird though. I bought my plane used and it had CA hinges. They did fine until one day I did a tumble and all of the rudder hinges snapped. Fortunately I was able to land it.

Thanks Frank! I am just using it for the maiden ... easy flying first then I will get a proper servo.