RE: Extra 300 Prototype #2
 

This is a Velox- but I dig the purple and red together.

Dave

RE: Extra 300 Prototype #2
 

Dave,

The Geico scheme was one of my first thoughts . . . my wife (who is more of an artist than I will every be) thought it could be better...

It is very cool you know the guy though...so why haven't you done his scheme since you have easy access to the documentation?

Rob

RE: Extra 300 Prototype #2
 

Cool,
I'll standby for the pic ;)
Rick

RE: Extra 300 Prototype #2
 

I do the cowl the way Brian Hueffmeier taught me.

The "J" brackets and the top "U" brackets get mounted first, flush against the fuse sides. (sand as necessary to recess them the thinkness of the cowl in from the sides)

On the top of the "J" bracket drill a 1/4" whole and place a dowel in the hole to prevent the bracket from moving side to side. (on this cowl I left 1/4" of dowel stickin out of the fuse, in hind site i should have left more so it does not slide of as easily when working on the instillation)

Tape the bottom of the cowl in place with wax paper seperating the fuse and brackets (Brian actually puts a small screw through the cowl and "J" bracket to hold it in place) and tack glue the cowl to the brackets. Repeat for the top (sand the joint between the cowl halfs if necessary for a snug fit. (for the bottom I used zap and for the top I used 5 minute)

Once this is dry remove and goop the brackets to the cowl.

RE: Extra 300 Prototype #2
 

Another picture of bottom, doing the top of the cowl and a shot of how it looks so far.

RE: Extra 300 Prototype #2
 

...and then goop

RE: Extra 300 Prototype #2
 

Hey Rob, Whats the advantage of flush mounting the cowl mounts? I have entertained the idea but I like the idea of a glue fillet on both sides of the top strap and J rounds so I haven't tried this method. The build looks great, Walt

RE: Extra 300 Prototype #2
 

Since you are pulling the top strap up against F1 with the 6-32 bolts, the whole cowl is braced against the fuse. You can literally pick the entire airplane up by the cowl (Brian actually did that on his plane when I asked him a similar question to prove his point!)

And have you ever tried to take goop off? I have (mushed cowl from a trying to torque roll without gas...) and I can tell you a filet on one side is plenty!

Rob

RE: Extra 300 Prototype #2
 

Walt,

I did not realize it was you until I opened the link under your signature! Thank you for stopping by! I appreciate your kind words about the build, however quite honestly I am humbled by your build and have posted less than I thought I would since you and Albert have covered most things . . . . from here on-out I will only post things I do differently than you guys, and my final (after 1st flight) pictures.

Thanks for your build!

Rob

RE: Extra 300 Prototype #2
 

Gooped Carden's new duct to the bottom of the cowl...

RE: Extra 300 Prototype #2
 

After a long talk with Dennis I decided to do a One piece cowl. So at this point I washed the cowl to remove any relase agent, sanded the matting surfaces and brushed laminating epoxy to the mating sides of the cowl, and taped the whole thing togehter to dry.

RE: Extra 300 Prototype #2
 

Hi,
Thanks for the great thread.
As per the Carden plans, the elevators are held in place by the elevator tube and a "L" bracket attached to the fuse.
I saw some threads in RCUniverse suggesting that the L bracket may fail easily.
A simple fix would be to add a 1/4" anti-rotation dowell in the elevator as an added "safety". Do you think its worth the trouble or am I overreacting?
Thanks
George

RE: Extra 300 Prototype #2
 

George,

Thank you for the kind words.

I believe the failures are caused by faulty installations. If the L brackets are being twisted in any way when you screw down the stabs, then yes they will eventually fail.

That being said, I put a 1/4" dowel in my stabs on this one. I have not done this on any carden's before and never had issues.

RE: Extra 300 Prototype #2
 

Weight as shown = 13lbs 12.6 oz.

RE: Extra 300 Prototype #2
 

looking good!

RE: Extra 300 Prototype #2
 

Does that include the ironing board?

Seriously, it looks great. We are starting to see these things covered now and I am really liking the way they look.

Dave

RE: Extra 300 Prototype #2
 

Rob,

I'm chuckling looking at that itty bitty hatch piece on the front of the hatch. I'm building the 260 and just finished fitting the canopy/hatch. That 300 canopy must be HUGE!

Ken

RE: Extra 300 Prototype #2
 

The plastic alone weighs one pound!

Dave... Faye Stille, the person who wrote the series of books on monokoting, told me there is no better place to monokote than an ironing board. I have been doing so ever since...

Feel free to post pictures / weights of yours here...

RE: Extra 300 Prototype #2
 

Looks good rob! Can't wait till tomorrow's test flight !

Albert

RE: Extra 300 Prototype #2
 

Albert,

Call me if you guys get a 300 in the air.
Anxiously awaiting!

RE: Extra 300 Prototype #2
 

Unless mother nature says no, my 300 will fly tomorrow.

Albert

RE: Extra 300 Prototype #2
 

rob, you have me ready to give up. my 330weight compleat less engine and radio is 20 lbs and my 35% 260 is 13 1/2 without the cf tube, engine and radio

RE: Extra 300 Prototype #2
 

albert, lastest aviation forcast for 10am is wind [email protected]ay heading is about 270

RE: Extra 300 Prototype #2
 

Bob,

I don't think the weight on your 330 is far off. If I add the weight of the pants, cuffs, cowl, canopy, main and tail gear to the above weight I end up at 18 lbs 3 oz. I still need the axels, pilot, panel, paint, hardware, to get to the point I think you are at with your 330

Albert...looking forward to it...

RE: Extra 300 Prototype #2
 

yea! that weight is everything.same with the 260