DA 85 IN 28% KRILL KATANA

[Flatlandman]

The plane will pull out of a hover with a DA50 at 19 pounds but it will be a slow pull out. Same goes for the 3w 55 although the pull out will be a smidge faster than the da50. Neither of the 2 will have any thing you would call impressive pullout IMO. Both will fly the plane fine but the upline for both will be limited. But you will be able to manage the speed and cary speed going into the uplines to do a snap and still climb a bit if your snaps are good and dont kill your momentum.

[zayzay1]

I dont get it how can a da85 destroy a 20lb plane with a good wing area and closer in size to a 33% plane rather than a 30%

aren't da85s suppose to go on 21lb planes like the sd 33% yak. How much more vibration dapening can an sd 33% have when compared to the krill katana.
the firewalls on the sd's yaks that I have seen are very thin, in a side by side the 35% firewall doesnt seem any thicker than the 30% firewall.

truthfully if it fits in their without a major modification I would put it on their.
how much fun (when considering pullout and vertical) can a 50cc plane be at nearlly 20lbs?

!!!this is just my opinion and please dont make rash decisions because of it.!!!

[joenella]

I just wonder how much power do you need, why not go for a BME 115 eXtreme !! as pull out from hoover has to be like a rocket launch, or a big banger like the ZDZ160RV-J as weight seems to be no issue nor vibrations.
I have flown an Krill Velox33% with ZDZ80RV-J(super) and it DIDN't lack power at all. The AUW where 23 lbs but when you have a static thrust of 50 lbs you don't need more power.
Your plane will come in around 18-19 lbs and you have about 40 lbs of static thrust from your DA50 you'll have plenty of power.

By the way, use 3x5955 on rudder and 2x 5955 on aileron and elevator as a minimum, 2x4700 Fromeco, 2xreceiver and 4700 Fromeco for ignition top it of with smoke and 40 oz tanks.

rgds
Joen

[Flatlandman]

	Quote: Originally Posted by joenella
	you have about 40 lbs of static thrust from your DA50 rgds Joen

I love the DA50 but this is just not gonna happen

[zayzay1]

40 lbs of thrust they should be using them on those 35 percenters and save some money.

[joenella]

Well maybe 40 lbs were a bit to much, BUT at least 35 lbs should be possible, if not those DA engines are as weak as and old man in an piing contest

rgds
Joen

[zayzay1]

most 50cc engines will give between 23 to 27 lbs of thrust more with a tuned pipe.

[zayzay1]

Prop RPM Thrust Ranking
#1 PT 23x8 6700 27.5lbs #2 JXF 23x8 6600 26.5lbs #3 NX 23x8 6200 26.5lbs
#4Mejzlik 23x8 6500 26.5lbs #5 PT 22x8 7300 24.5lbs #6 TBM 22x8 7100 25.25lbs

troy built models propeller testing on well broken in da 50.

the da 50 is suppose to be the most power per cc.

[joenella]

I'm glad that I didn't go for DA power then.

I love my zdz's

rgds
Joen

[as722]

G-62, perfect !


Albert

[zayzay1]

joenella nearly all engines in specific cc ranges produce very similar power with few exceptions. a zdz super 80 should be producing around 42lbs of thrust which is dead on with a da85.

[joenella]

	Quote: Originally Posted by zayzay1
	joenella nearly all engines in specific cc ranges produce very similar power with few exceptions. a zdz super 80 should be producing around 42lbs of thrust which is dead on with a da85.

Well actually my ZDZ super produce 49,62 lbs of thrust, I'm using mejzlik 26x12 @ 6310 on KS 95 cannister. It is well broken in more than 40 gallons.

If he wants power use a ZDZ super or BME 115 eXtreme but both will destroy the plane, but it will be fun for sure as long it last.

rgds
Joen

[Black Bird]

I have been watching this thread and I thought it would be time for me to throw in my two cents. The major concern with an engine aircraft combos is p-factors. A bigger engine, even if it is around the same weight, will swing a bigger propellar. A 26" prop would be too much for this aircraft. I would recommend the ZDZ 80. A ZDZ with a Vess 24B may be just what you looking for.

It seems like you really want the DA-85, but the only thing that prevents you from buying it is the airplane. Gud luck with your decision.

[zayzay1]

joenella that's a beast, i would not mind bolting that on a 20lb plane.

[RCMgraphics]

I think a few people need there head checked on here

But hey go ahead and put way over powered motor not called for this katana..but I just pray that when you fold it up it dont hurt someone else when it happens

I have one with 2gallons threw it before I had to put it away for winter..its verry unlimited with the DA 50 on it and MTW canisters.and its not even close to be broke in

Sure dont get people sometimes

OH yes..dont even get where this 19.5 lb comes from. mine sure isnt heavy