Not worried about money issues with this one.
I am going to get a biplane with a OS 1.60 already installed.
there is plenty of room for more engine but I want to switch it to gas.
the plane weighs around 12-16 lbs??

I want to switch over to gas to save on fuel cost and just have a plane to fly and have
fun with. no more glow plugs or glow fuel.

what would be the equivalent to this motor.
I plan on flying it 3d so it would need enough power to pull out of anything.
right now it has almost unlimited vertical but I want the tourqe.

any suggestions are very much appreciated.
thanks!!

Hi

A SM-30 runs about the same props/RPM as the OS-160. And is also not to heavy.
18x8@8200rpm.

otherwise I guess a DA-50, will swing a bigger prop, better efficiency....

Winfried

Who makes the sm-30 engine
Is there a website I can go to??

I will also look at the da-50
thank you

You should also look at the Brison 3.2. This engine should be easier to mount than the DA.

SM-30 website:

http://www.modellexclusiv.de/

All in german..... If you need specific translation.....

Weight about 1200gr,
Price about 450 Euro

I guess the Da-50 is cheaper.....

Check out the MVVS 26c (1.60 cu.in.) gas engine, it should bolt right up to the mount in place of the OS 1.60. This engine will swing a 18x8 wide blade prop at 7600 to 8400 rpm depending on exhaust choice. This works out to about 17 pounds of real-world thrust (over 20 pounds if you beleive ThrustHP) so in a 11 pound airplane 3D will be a possible - on a 16 pound airplane it won't. There are several 40cc engines available if more power is required, but thier suitability depends on the airframe.

About comparing the OS-160 and MVVS-160 on Gas:


We are flying two Xtra-2000 pattern planes, one with a OS-160 the other one with a MVVS 160 on Gas.

The plane with the MVVS has got enough power to fly the pattern schedule, but is not even close to the power of the OS.

This does not say anything bad about the MVVS, it simply not true that a same displacement GAS or Methanol engine will deliver the same power.

The MVVS has proofen to be a very reliable and easy to start engine, and fuel consumption is indeed much lower then the OS.....

Winfried

<message deleted>

I'd go with the MVVS 1.6 Gas, Got one for my SU31 and all i can say is; GREAT engine

Good Luck

The best gas engine to replace the OS 1.60 FX at this time is the ZDZ 40. It is the smallest and lightest gas engine that will make as much or more power that a 160FX. The ZDZ's flying weight with fuel (14 oz.) is about the same weight as a Moki 2.10 with fuel(24oz.) but with lower fuel costs and the same usable power. 4.8 HP!

If you are willing to take a reduction in power with no flight weight gain (less fuel) go with the MVVS 160 gas.

There is also a chinese 29cc engine marketed by Canaday that will make the same power as the 160FX on a tuned muffler. It weighs 44oz. with ignition and stock steel muffler and stock makes about the same power as the MVVS on a pipe.

FPE 3.2

I don't understand. The ZDZ 40 weighs around 58 ounces with ignition, and muffler. Scroll down to the bottom of this page:

[link=http://www.chiefaircraft.com/cgi-bin/rcm/hazel.cgi?action=serve&item=/Models/Engines/ZDZ/ZDZ.html]Chief Aircraft[/link]

What do you mean, "flying weight with fuel"? Do you mean the weight of the whole engine package, plus the weight of the fuel?

I'll check out the 29cc. Thanks.

I can't find any information on that 29cc, Chinese engine marketed by Canaday. Can you please post the contact information. Thank you.

Marl Bell

Thanks for all your input guys.
I really like the looks and specs of the zdz 40

wing ding.

phone number is 816-528-3937. No website yet. They will email specs to you. I do not know what the warranty is.

Hey Brian,

Thanks very much. I'll give 'em a call.

Marl

Why ZDZ40 when the DA50 weights about the same and is in a completely different class?

Joe

james,

The weight range you mentioned is a little broad, and in my opinion the encompasses 2 classes of engine. If you can keep the weight under 15-lbs I would go with either a Brison 2.4 or the ZDZ-40 (both 40cc engines) as mentioned earlier. If you end up over 15-lbs go a little larger and get a 50cc engine (Brison 3.2, ZDZ 50NG, DA-50R, BME 50, FPE 3.2, Taurus 52 and others). At 16-lbs and with a 50cc engine you will realize a ton of power. Keep in mind a 40cc engine will easily turn a 20" prop, while the 50cc engines swing 22" props. So, check your ground clearance! Anyway, good luck!

Man, sometimes I'm not too bright. Brian, I just figured out you meant how many ounces of fuel each airplane carries. I figure that is 414cc's for the ZDZ, and 710 cc's for the Moki.[sm=bananahead.gif]

well guys I don't have the plane but I want to buy it.
the only catch is that it already has an os 1.60 in it. I know it puts out around 4 horses and I don't mind using glow but I want to change over
to gas. this plane is not to heavy but it is big.
heres a pic included.

it has about the same specs as an aeroworks 27% ultimate.
I know a guy who had a DA-50R on his.

SPECIFICATIONS
Wing Span 63" (about the same size)
Wing Area 1420 Sq. In.
Length 63" (maybe a little shorter)
Weight 14 to 15 pounds (assuming the same weight)

thanks for all your help.
I have been trying to find out who makes this biplane and can't find anything out.
I beleive it is a weeks solution but don't know what kit it was made from.

It would depend on the airframe. The ZDZ is more than enough power for the Gene Soucy 1/4 Extra. It is good for planes between 12 to 15-16 pounds where unlimited vertical is required. I would not use a DA in that plane as you would cut away much of the cowl. The DA is good in planes weighing 16- 18 pounds with unlimited vertical. It would be gross overkill in a plane less than 15 lbs.

I have a ZDZ40RE on an Agressor and im not that happy with the engine. It shakes terrible and only turns a Menz 19*10 at 7200 rpm on a Krumscheid 1050 pipe. To my opinion this engine does not live to its reputation.
Now that the Brison 52 revolution engine is also advertised for in the UK, I will replace the ZDZ by that one.

Somthing wrong in the Netherlands --
Having used that engine in 11 lb models (very light construction) - on pipes - we got pretty smooth low speed performance and a lot more power.
The new Roto's I am also running, do run smoother - I am of the opinion the ignition plays a role in this .
Send a memo to ZDZ or Amelung ( or where you purchased it) and ask if they feel your setup is correct.

No I do not think so...
See my previous posts:
http://www.rcuniverse.com/forum/ZDZ4...2087111/tm.htm
http://www.rcuniverse.com/forum/Timi...2087347/tm.htm

My conclusions are that:
1- Based on the test-numbers from the FMT magazine the performance of the ZDZ is not superb.
2- The ignition auto advance function is not optimal. Ignition should be later at lower rpms

Expecting more than 6900 rpm from a 40 with a 22-10 of any brand on it is a little much....No matter WHAT the company says....
FWIW.. Any made in USA ignition using a syncro spark module can be set up to get full advance at 6000 instead of the more usual 4000...Why would a retarded ignition make the engine run better ?
My G26 conversions are set at 28 BTDC with FIXED timing..Tried syncro spark and mechanical advance, couldn't tell any difference....There is no better running small engine around...But then I don't have unreal expectations about rpm... My numbers come from testing with normal setups....[8D]