From what I hear it should be a very simple, quick, build.....

I am curious though as to why it's rather heavy stock. 35oz seems kinda heavy for a 60" plane. Does it use heavy wing spars?

I know it RIPS the backside as is, but do you think it could be built around 25oz and add a ballast tube when needed? Just a thought...


Any other suggestions??


Thank!!!

Don

a Pretty common weight for the 60" JW is 30-35oz... 35oz is building it pretty beefy..

for Hardcore DS 40-50oz is common.... and you will be very very very surprised how light of lift a 40oz JW can actually fly in... a stock build in the low 30oz range will fly the a VERY wide range of conditions.. im talking roughly 5mph on a good slope and it will cruise along with just about anything...

build it like the instructions say and even if you do hit the 35oz mark, you will have no problem flying in the same air as a light moth.... you'll see.. it will fly LIGHT air just fine at 35oz...

JOe

The JW has a thick airfoil that generates a lot of lift, even at slower speeds. Mine was built to specs using Ultracote, 85mgs and an Electron 6 rx and came in at 32 ozs.

Sweet thanks guys....


I guess I'll just build it stock and slap in a ballast tube just in case...

I want the shape the fuse pretty good, so I may save a tad there, but I'm not too worried about it if it flies great in light wind...

Don..





BTW, JOe, just brought home the wife's 91' Cherokee... woooo hoooo....

I guess I have a USV now...

Originally Posted by THUREN

I want the shape the fuse pretty good, so I may save a tad there, but I'm not too worried about it if it flies great in light wind...

I wouldn't say that it flies "great" in light wind. It does fly, but my JW (which is CGd right where Bowman says - I think 2 1/4" back) is really a DS machine. It kicks in the DS groove, but I don't fly it on the frontside if I can help it. It's kind of a pig at lower speeds.

yeah, in light wind its not Jaw dropping... it gets ripping on the frontside in 15+ it will just about hang with anything out there... 3 JW's were hanging JUST fine with 3 halfpipes at parker 2 weekends ago... no noticeable difference...

the great thing about the JW (other than DS speed, retention, and Durability) is that the Inverted performance is awesome! its right up there with the Halfpipe for inverted flight....

JOe

Thanks guys...

I'll definately have a "light wind" plane, and I can't wait to build the JW...

Heck, that strange wind day at Parker 2 weeks ago they were flying great on the frontside... That's what made me really want one. That and watching them "piledrive" strait in on the backside, bouce, and basically keep flying...

Don

I don't know how it was blowing that day at Parker, but as a general rule, the frontside of Parker is going to offer more lift than most places with the same wind. The spots I fly at don't hold a candle to Parker on the front (and certainly not on the back).

Its not easy to do a ballast per se on the JW becasue the spar sits on the CG. Better to build it a little heavier. Some guys put slugs on the underside of the fuse. Taped on decoy weights also work well here also.

BTW, put in a trailing spar and it will be even tougher. My first one lasted two days of DS training before tearing the wings off at the root. Now I am putting off building another. Ugh...

/Adam

Awesome guys.....

K, got the wings set with the spars all PU'd in place, and might I add, DAMN THESE WINGS ARE STIFF!!!!!! You could pretty much support 50lbs in the center of the wing and it wouldn't even flinch!!!


Another question...

After all's said and done, "about" how much extra nose weight is needed? I know this is a pretty vague question as the gear used will determin changes but I quess my question would be..... What are you guys running, and how much extra nose weight do YOU use? If any at all... I want to try and build the wings up STRONGF, without having to add any center weight if possible, and still keep the AUW around stock...

Don

I needed very little noseweight - definitely less than 2 oz and probably less than 1 1/2 IIRC. I don't see why you couldn't use a Gulp-style fuse mounted ballast tube if you really wanted to. Get 1/2 ID brass tube from the hobby store and center it on the CG. You may never need it or use it, but it'll be there.

I think I am getting one for Christmas. The other night, the doorbell rang so I went to see who it was. Well, there was nobody, then I looked to my left and there was a box with Bowman letter head. I know the Mrs. has been talking to IRJ, and I wonder.....

That BETTER be the reason she was talkin' to Rick James, anyway!

I'm Rick James, BIH !!!

Originally Posted by sekollera

Its not easy to do a ballast per se on the JW becasue the spar sits on the CG.

Could always build it with two ballast tubes, one in front and one behind
the spar, and just load up with equal amount of weight. That also
lets you make the tubes pretty short to keep the mass inboard
to avoid increasing yaw inertia.

ian