bps

My Feedback: (3)

Just that the kit recommended cg is way forward of the lower wing leading edge. I plan on trying mine where it is which is just about 1" in front of the lower wing. I have a DLE30 in mine and it is just 12 pounds.

Cheers

mrbigg

My Feedback: (21)

What prop you running?

bps

My Feedback: (3)

Start with an 18x8 and might go down to a 18x5

kerwin50

anyone got any pic's with the dle set up

bps

My Feedback: (3)

Here are a couple of my DLE30cc posted on another forum. Looks like this plane needs nose weight to ballance if the specs are correct. I am still working on verifying that. Prop is 18x8 and plane tips the scales at a tick under 12 pounds. Receiver battery is 2a 6 cell NiMI and the ignition battery is 2A 4 cell. NiMI.

ado9518

HI kerwin, here are some pictures of my setup. I'm going to pull out that big chunk of lead up front to move CG back.

Have nice fligths!

ado9518

And a few more...

cubcrasher

My Feedback: (6)

Got mine last saturday, and a brand new magnum 180fs to go in it.............. sweet

kerwin50

What motor is that

cubcrasher

My Feedback: (6)

Magnum 180 four stroke

ado9518

This link shold work:

http://www.maxfordusa.com/crrc26ccgasengine-2.aspx

bps

My Feedback: (3)

Where are you going to put the cg? Also a flight report after doing that would be great!

Thanks for posting.

ado9518

Flew her last sunday with CG about 110mm (4.5") from l.e. of upper wing. It feels a litte "lighter" on sticks and I like it more than my original set up.
I feel it could be safely moved furter back, but for the moment I prefer leaving it as is and experiment with it.
Inverted flight is still a bit difficult, maybe due to the semi symmetrical wing section. Iwill increase control throws on both elevator and rudder.

When are you going to maiden yours?

bps

My Feedback: (3)

Congratulations on a successful flight. Can I ask what prop your using and how many rpm's? I think this flight shows us just how far forward the recommended cg is. What do you mean by inverted flight is a bit difficult? Also how were the landing speeds? Some that have flown with the recommended cg say it lands hot, which could be an indication of a nose heavy plane.

I just need to get a receiver and my plane is ready. As good looking as this plane is I am growing tired of looking at the plane on the work bench ready to fly! I have been working hard trying to get a 1/42 scale space shuttle ready for an American Diabetes fund raiser our club hosts each year.

Also do you transport yours assembled? Mine will fit in our van but just barely!

ado9518

Prop is 18x6, but I didn't actually measure rpms. My home made muffler reduces rpms if compared to the one that comes with motor, but is definitely quiter. Full power is not a concern: can loop and do big split S at less than 1/2 throttle and climb out of sight at full. Didn't try hovering (pilot's fault ...) but Ifeel it could.

Inverted flight requires a lot of down elevator. It's not able to fly an outside loop, but now elelvator has a throw of 15mm only; I will increase throw to 25 mm and see what happens.

Landing speed is similar to a low wing sport plane and I wouldn't say it's hot.

Yes, Itransport mine assembled. It's quite a tight fit in the trunk, but mounting at he field would require too much time

ColeTrane

My Feedback: (1)

Fellas,
I just found this thread and this is my first post, so "Howdy" and...I have the BH Models Pitts, bought it Feb 2011 at Hobby People in Camarillo, Ca. I travel to Ca frequently on business(iman Oklahoma boy). Mine is CG'dutilizing the mean aerodynamic chord dueto the top fwd wing beinga swept back design. I dont have theexact measurements, but IIRC its roughly 1" back from the LE of thebottom wing.This dosnt apply much to static CGBUT,be advised, for an ARF(engineering should be already done) my wing incidences were totally incorrect and for that matter, were backwards. RC airplanes can be setup to whatever the userwishes for that matter, positive stability, point click,0*0*but IMO if you want to reap/enjoy the benefits of a truebipe then wing incidences are"crucial".My wing incidences outta the box were:

Top RH 1.0*+
Top LH 1.1*+
Bttm RH 2.5*+
Bttm LH 2.5*+

IMO these are totally backwards. If you were to fly in this config,whileslowing for approach your bottom(or aft wing in the Pitts) would stall first,(now your flying on the top FWDwingonly)causingCG to moveAFT which "could" cause the model to violently pitch nose high. Combine that with low altitude, on a slowapproach speed and alawn dart it becomes. IMO youd want the TOP(orFWD wing in a Pitts) to have the higher wing incidence forcing it tostallFIRST(now your flying on the bottom AFTwing only)whichmoves the CG FWD, causing the model to gently nose over on approach as your speed decreases. Mine is nowhere near perfect, but flies inverted with minimal elev, inside/outside loops, rolls, knife, knife loops...This model will do it all, just needed some tweeking....Curently mine is flying "ok" with:
TopRH wing: 2.5*+
TopLH wing: 2.6*+
BttmRH wing: 1.5*+
BttmLH wing: 1.5*+
Running 6*DT with roughly 4* RT...currently running aST G2300 17x6 prop

Sorry for the long rant as a first post, but grab your incidence meter and at least verify em before you chase CG and badflight charateristicsall day. Im still dialing mine in, but for the most part Im happy with it. Im just a picky setup kinda guy...Again fellas, these are just my opinions, aerodynamics isnt rocket science and models fly just life the thefull scale realones do. In flight its all a balance about the center point of lift, a flying teeter totter!
I have pics and a flight vid Ill post when I get home this afternoon..


Id like to hear what incidences you guys are in fact running too.......


.

kerwin50

Most of the biplanes I've flown have a positive decalage. That is the top wing is positive to the lower wing.
The postive gives the plane more lift.

ColeTrane

My Feedback: (1)

True....Decalage is the angular diference in incidence between the upper and lower wings, obviously relative to the h-stab, but generally speakingdecalage is normallypositive. I wouldnt say having a higher decalage number provides "more" overalllift, but it would offer a higher AOA. Would also increase the drag beyond a certain point. Youd still have to offset it all with the proper DT if you wanted...

kochj

Not after it was reviewed in MAN!....

bps

My Feedback: (3)

I agree with some others, $199 ARF I can see that and take a shot at one. $349 ARF not so sure.

kerwin50

yeah they raised the price back up now, just my rotten luck

vasek

My Feedback: (4)

get a good review in MAN... [:@]

flycatch

My Feedback: (26)

Go to your local Hobby People store and check to see if they have this ARF in stock. If they have, ask them for the discounted sale price.

kerwin50

Now bps That DLE 30 will pull that plane around like a rag doll.
Mine with a 18/6W has 19.6 pounds of static thrust.
I have it in a 10 lb 3 oz plane and it has no problem hovering it at 1/4 throttle.
She is going to have an INSANE amount of power

flycatch

My Feedback: (26)

Were did you measure the LE of the top wing from? Was it from the side of the fuselage or where the wing panels join? This makes a huge difference in CG location. Please get back with me.