Hi,

Can you please provide the max static thrust of this engine (ZDZ 100cc B2NG) with a suggested prop?

Would it pull well a 3D model at 14Kg+ (31Lbs) weight range?

Thanks in advance,
Nikos

Propped with a narrow type -good solid 26x10-- and using a decent exhaust system -- expect STATIC THRUST to be somewhere in 40-50 lb range .
On pipes , more -- on a shi--y exhaust set up less. We have used these on 27lb models -on cans-wit h excellent performance
on a 31 lb model - - you are out of the high performance envelope - with ANY 100 cc engine..

Hi Dick thanks,

Is the High Performance envelope related to the wing loading or the power to weight ratio?

With KS Canisters and 26x10 Mejzlic prop what is the expected thrust roughly?

The model that has this engine on is a Krill Katana 33% and I think of getting it but I expect some descent perfromance, otherwise there is no point for the purchase.

Will it hover? Will it have a descent pullout according to your experience?

Nikos

Power to weight ---A 100 is simply maxed out pulling that load - - it will pull out - but how it does that is typically at a vector not a vertical pull - funny you should ask that - I recently watched a video replete with background cheers with the model "pulling out of a hover - (it nosed over a bit before getting into motion - In my book really ho hum performance.
Most 100 cc engines , even at sea level are out of theitr element at 30 pounds - (again my opinion)
Some mfgrs crow about how theirs do this with ease - I simply have not seen it
A good 116 will do it on tuned cans (the MVVS/ EVOLUTION ) These will crank 30x10 Mejzlicprops at 6000 which is a good prop comparison match for 30 lbs .
I get an honest 6600-6700 out of a fully piped 80 on the Mejzlic 27x10 On the 80J- based on my own ZDZ100s - others 100's piped etc.--this and other big 80's PIPED--are is at the top of the max heap for 100cc n under engines. (Sorry about that 100 lovers )-
Still this is not a good setup for 30 + pounds - again MY opinion.
On what some call "stock "mufflers expect far less power.
You will get it.
The light 100 ZDZ really shows off up to around high 20 pound range- on good cans and setup right and is very smooth.
I don't mean to kill someoones sale or poo poo others ideas about their favorite 100- but Ifn it were me - I wouldn't match any 100 with stuf over 30 lbs .
For really spiffy unlimited aerobatics.

Your weights seam very high. If the Krill is a comp at 33% scale it should be 24 to 26 lbs. If it is heavier than that look at another manufacturer. 31 lbs to me would unacceptable. I have a 106", 35%, SD Katana (wood) that weighs 26 lbs. with 2 KS cannisters. It would weigh about 25 lb on stock mufflers. What makes the Krill so heavy?
The ZDZ 100 should be an ideal engine in that size plane. With or with out cans or pipes. I've been told the NG version doesn't need tuned exhaust and by my experience with my 50NG I agree. The macs pipe gives it a slight power boost but a way better sound.

Amazing! I know it wasn't as much fun but remember when we used to fly 20 plus pound aircraft with geared .60's and big props? Now it requires 100cc's or more to fly a plane that weighs 10 pounds more

Dick, I know you do[8D]

The TOC stuff from the mid 70's on -- I was involved with and they had nowhere near the power to weight on our present stuff
once we got into the hover and straightup rapid recovery - we really changed the acceptable criteria for power to weight.
I have models which unload going straight up -you can hear it happening .
It is pretty much common now to look for that kind of performance -- the foamies showed us how well models perform with 2 and 3 -1 power to weight setups . Now i is becoming a std. When I lived in Cincinnati - the "dBro boys showed up at patterncontests with big ol cardboard models with geared 60's - amazing for all of us at the time. We did patten models with OS factory gearbox 60's - they made horrible noise when piped to really run -but our 9 lb Cap 21's really performed

Here's the rule for required static full pull out of a hover.
Will pull out at 1.5 times plane weight (no fun)
Will pull out with gusto at two times plane weight (too much fun)

Dick, could you check that rule using your engines/planes/experience and my spread sheet at your altitude?

http://www.mvvs.nl/prop-power-calculator.xls

TIA

What plane are we talking about? A low 30+ lb airplane with sufficient wing area to carry it for high level aerobatics would be a great match for the old style ZDZ160 Champ. It weighs just a bit more than most 100's.

I have one and have kept it just for the possiblity of someday putting together an aerobatic plane with around 112" span weighing in the 30-32lb range. It would be a lot of fun.

Dave

I have a Krill 33% all up weight whith a BME110 and KS 1060 is 26lbs on the nose there is know way that plane with a ZDZ 100 will weigh 5lbs more

I'm with Dick & Pe. I like foamie power, at least 2:1 for me. Since I am NO TOC pilot, that power has saved my bacon more than once.

Hi there,

Thanks for answers, I was about to buy a used Krill Katana 33% with a ZDZ 100cc on it. The model was nealy new and in good condition, however the onwer had put some weight on it due to some re-inforcments made and modifications. The model after my modification (putting it on a diet) would come at arounf 30-31 lbs. In terms of wing loading this would be ok as, I have flown models with higher wing loading and were ok for 3D. For exapmple my QQ YAK 85'' is around 85gr/dm^2 and flies like the sim, the Katana would come at around 83 and due to the higer Reynolds would fly much better. BUT at this weight if the engine can not pull it, then I am not gonna get it.

If I go for a new one, I have the following options:

- DA 100cc
- DA 85cc
- ZDZ 100 B2NG
- 3W 106cc Twin

What do yout think?

Thanks again,
Nikos

I would think the ZDZ would be best for you. It is made near you. It is lighter. Probably only .25horse difference in HP between the Da and ZDZ. Either run on stock mufflers fine. I'm concidering the same delema. So far I'm leaning to the ZDZ.

Any of the engine choises whould be fine no right or wrong here the 3w will give you most power.

3W 2B 106cc Competition Series (Red Head) seems to be the best option 12.5 HP and a bit heavier from DA about 200gr. DA has an Output of 9.8HP. ZDZ is a lot lighter but don't know whether it will provide the pull of 3W or DA.

What about singles guys? Any experience here at 80cc?

Thanks,

Nikos