Diablo-RCU

My Feedback: (1)

Krumscheid makes headers parts that you can braze together with silver solder. You can make an "S" pipe from three curved pieces and an exhaust flange stub.

http://www.krumscheid-metallwaren.de/

SVM

RC Showcase has the wraparound header.

Mrt1750

My Feedback: (1)

vatechguy3
Look on my web site I did it for a Hanger 9 Sukhoi also look on Edge 540 page for horizontal mount, it is not hard to do and the results are worth it 98DB's at 3 meters with a 26x10 prop and over 6000 RPM just had it checked last week by the noise police.
This new 80RV sounds like something I'm going to want.
www.tangoncash.com
Thanks

flier

My Feedback: (7)

The power of the schwartz!
Placed this "New" ZDZ 80RV-J on order.
Used the wifes credit card also(he he)
Happy B-Day to me!
Got a KS canister, just need to get the header made up.
Dick- What parts did you use for the test setup header?

davewallace

My Feedback: (29)

Hi,
They may come out with a rear exhust, but it would take a redesign of the piston and cylinder. Might run hotter also.

Dave

Scoubidou

My Feedback: (17)

Flier
What KS can are you going to use?
I think the KS-95 would be a good one! I sold my ZDZ-80 in 24h to a flying body. This new black head is very attractive now
Daniel

rmh

I used a 28mm header , 5"long and a 30mm inlet JMB can for 210 ZDZ.
KS parts will make this this

rmh

I used a 28mm header , 5"long and a 30mm inlet JMB can for 210 ZDZ.
KS parts will make this this.Also---Ihave tried KS cans -on various length headers and flown em quite a bit
Theyare quiet but not as quiet as the JMB also unless they have a foot of header -they would not equal the JMB performance wise.
I have two KS sitting in my "barrel o pipes " for precisely that reason. Ikeep em for tests against other systems, just to make sure I get a total look at what works best for a particular engine setup

flier

My Feedback: (7)

Scoubidou
I got a Ks-89 here now.

Dick how will the KS-89 compare to the JMB?
I'll get a 28mm header and keep it short.

rmh

run it on 12"header -
When I tried these on really short header -they did not perform well.
but try it
Look at volume compared the the can I am using. it is 3"dia by 12" long body
here are other setups I ran a few years back - a Czech copy of the KS- very good

flier

My Feedback: (7)

So JMB will be less noise And more power?
Would like to keep the header as short as I can.

rmh

Try it -I simply found that it restricted and did not run till I ran 12" header -on 26x10 MenzS
The really short big header on the big JMB works better for me

flier

My Feedback: (7)

Ok thanks Dick, I'll get the same setup, JMB/Short 28mm header.
Is RC Showcase the only place to get the JMB cans?

Scoubidou

My Feedback: (17)

Flier
I studied a lot that question about the right can for the ZDZ-80. Like Dick said, the Ks-89 is too restrictive for a 80CC. More volume=more power, These engines need to breath to deliver power! ZDZ recommend 9.8 to 11 inches header for tuned can.
Do not forget europeen run their engine at lower rpm than North America to keep noise down.

Dick have you tried the KS-95?
The KS 95 tuned can has the same dimensions of JMB 80/80/300 non tuned can. I do not understand how the JMB 105/80/300 with 30mm inlet can work, if the header diamer is only 28mm in your case? Would it a better choice to put 30mm header for the JMB 105/80/300?

Daniel

rmh

Have not run that can - frankly I like the JMBs much quieter and nicer sound and they work-
The 28 mm header in photo is as large as I could get . the earlier headers were smaller and were restrictive
I did see improvement going to largest JMB can-the 105 80 300 which has 30mm inlet That is the one in the picture

Dangerous Dan

My Feedback: (1)

I am interested in this engine. I would like to use a wood prop(personal prefrence). It would go on a Wildhare Extra 260(22 lbs)! It would be set up for precision. I would not need speed. Also I would be using in cowell mufflers(noise is not an issue). What prop would you recomend size and brand? 28x10?

Also you said in an earlier post that this engine is what they say! The ZDZ website stated that it has 20% more power than the old 80, the old 80 has 8.5Hp so 20% more would be 10.2 hp....A Da 100 is 9.8 HP!

So is this engine really 4% more powerful than a DA-100 and a pound less?

rmh

Boy- When you apply hard numbers to variable setups - you end up with confused info----
First - the current in cowl mufflers for a 80cc engine are woefully undersized -
So the engine is not on it's game with these devices .
I think (not hard info) new in cowl mufflers are being designed for it - The current ones will NOT fit (different bolt pattern).
Adding up % numbers does not give true picture.
Having said that - The info I was given -when testing the engine was given in rpm expection -comparisons.
It proved out , the 26x10 props depending on which brand -ran 300-400 rpm faster than my current engine -on a short header and a JMB can. That is about 20% more power ,more or less.
Having run,and been around a few DA100's -all setup well and running very well on in cowl mufflers -The power is about the same - Swapping exhaust sytems around the picture will change --A LOT
My new 80 ran Mejzlic 26x10 on a pipe easily over 7300 on bench run ups .
Not having run the DA100's on twin pipes - I can't say how they would compare.
For flying tho, the new 26x12 prop I show in the pictures really showed the best use of power available.

Scoubidou

My Feedback: (17)

Is there a power curve available somewhere to see where we should keep the engine running for maximum torque and the engine is not overheating?
1) 7000 -7400RPM or
2) 6500 to 7000RPM or
3) 6000 to 6500 RPM

The exhaust and prop could be set to reach the desired running RPM!

Daniel

Dangerous Dan

My Feedback: (1)

Based on this comment I was asking if there was a 28x10 that you would recomend to slow it down a little I will only be flying IMAC.

I currently Have a 22x8 MSC on a BME 50 and Love it it has awsome breaking power and lands really slow!

I build my planes in reverse:

Research
Buy all Hardware and electronics
Buy Engine
Buy Plane

By the time i buy this engine 6-8 months there should be some good incowell mufflers avalable. If it is from bisson then I will order it direct from bisson with larger outlets ind the curved in tips cut flat.

Based on typical symiliar setups a Can will only give me about 100 or so more rpm's for 10 more OZ. Personally I like the sound of an in cowel muffler and I use throttle to get 5's on sound score.

rmh

6500-7000 good operating range -any of our gassers 80 up to 100cc
max power is tho over 7000 and again true for same sizes
as you go smaller rev em more
I NEVER use a prop sized to slow the plane - You are simply loading it under the power band
prop for max efficiency -then run throttle to control noise-speed
The engine runs cooler etc..

Dangerous Dan

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Any Pics of that new switch?

flier

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I believe the there are pics on the ZDZ web site.

Dangerous Dan

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i looked but didn't see them. It mentiones they are included but i can't find details or pics. I did see one pic where it was beside an engine but you couldn't see much.

Maudib

My Feedback: (51)

Pics and info of the Switch will be online soon...

Apparently the rpm meter is sold seperately and reads the onboard tach within the ignition so you can know top RPM in the air.

Looks like a "plug" of sorts is used to select on/off...

Sailor

My Feedback: (1)

I am somewhat of a noob, so excuse my ignorance in the following question:

Does the twin 80 that ZDZ currently sells outperform this new single cylinder version? If it is negligible, which one is lighter?