CEF speed contest Design Discussions

Okay... You guys are toast! Here is the winner! When finished, it will be my interpretation of N590PM, a Beechcraft Bonanza that was actually raced in cross-country events. I have worked on the actual plane, and it is a BEAUTY! My model spans 16", and checks out to 48 square inches of wing area. I even incorporated the trike landing gear, to preserve authenticity! The full-scale plane's pictures can be seen on the internet by typing the "N" number into the bar at the top. See why this one will not be purple? It's just too pretty, the way it is, to subject it to my purple influence! Here's mine-before paint...

Bonanza annihilation!

Look out Doug! I'll be gunning for you...


Good job on the build, you sure do work quick!

That's Bonanza's TOO COOL!!! and with that trike gear; you're probably the only one of us that wont be breaking props on landing! Love the "V" tail!!!

I need to get by butt in gear... been dragging my feet and over-thinking things so much... my shoes are worn-out. Meanwhile my airplane sits in pieces waiting for them to be sanded... I hate sanding.  

I checked the weight using a digital postage scale, on 2 different types of pushrods... one being .062" (1/16" dia.) music-wire... the other; .062" dia. carbon-fiber rod.

The music-wire piece at 9" long, weighs .10 oz. or 3 gr. I could not get a weight to register for the carbon-fiber rod... in fact; the carbon rod I weighed is 12" long... with a short 1/16" music-wire Z-bend, spliced with an aluminum tubing sleeve... I have x2 of these carbon rod assy's. for another model I'm building... and BOTH yield no reading in either oz. or grams.. on my scale.

This could make a HUGE difference in your speed models' cg. If you're "tail-heavy" after painting and installation of a music-wire pushrod.. you could very possibly correct the condition by switching to a carbon-fiber pushrod. You actually gain 2-fold... by correcting a cg issue while "lightening" the model... which is not usually an option at finish time. The same applies if you opted early-on, for a carbon pushrod and are excessively "nose-heavy"... switching to a music-wire pushrod will add a considerable amount of weight to the tail... yes; you're adding weight here... but at least it's "functional" weight.

9" length 1/16" dia. music-wire (weight-below)



"TWO" 12" length 1/16" dia. carbon-fiber rods with 1/16" dia. m.w. links installed (weight-below)




Any questions?

Hi guys just a quick question regarding the rules. Whilst doing research for my model I.ve found something more unusual. How about a Piaggio-Pegna PC7? Sadley using a Hydrofoil to take off, it has no wheels. Is it in the rules for me to lay down a piece of some sort smooth board so I can ROG off the hydrofoil? Once I can rember how again!!! I'll post pics.

Cheers.   

Is this crying out to be built?

Cheers 

OVERLORD wrote:Very cool Mike, although the real one never flew, R/C models did.

Lieven

Apparently a full-size prototype was built though.
http://xplanes.tumblr.com/post/120602829/schneider-trophy-special-cowes-1929-the-oddest

http://en.wikipedia.org/wiki/Piaggio_P.7

Phil

ebeneezer wrote:

Is this crying out to be built?

Cheers 

I thought for sure you would build the Buggatti, that's why I've already pondered a plane that was built but never flew. I'm going to say it's ok because a prototype was built and and tested in the water. Also because I considered building it myself   However in the interest of fairness I think it needs two wheels dangling in the breeze like all the other entries. I'm sure you could tuck a wheel in the hydrofoil and have it be visually unobtrusive. I actually considered building a Supermarine Schneider Cup racer with wheels hidden in the floats.

Jim

Entry #2 roughed out:



Jim

JPvelo wrote:Entry #2 roughed out:



Jim

Nice Jim! I like how you angled the grain on the wing panels.

Roddie

Ok, I give up. Not sayin I'm gonna build anything, but was wondering where are the rules for this contest? I'm starting to think that there's some old dried caster oil soaked wheels slowly starting to turn????


maybe...


or a...

Mark Boesen wrote:

JPvelo wrote:Templates for speed plane #2:

Any guesses?

Jim

Yep, Miss Ashley ll.  Scratch built P-51 fuse with wing and tail from a Lear Jet.

Jim

thanks

Mark- Build the Stiletto and enter. The Stiletto is sexy!!!!!!!!!!!!!!!!!!!

Duke, Which Stilleto? The one with the Mid Engine?

RK Flyer

duke.johnson wrote:Mark- Build the Stiletto and enter.  The Stiletto is sexy!!!!!!!!!!!!!!!!!!!

The Tsunami would be the easier build, wing and stab are pretty straight lines, but your right the Stiletto ROCKS!!!!

I started the Stilleto about a month before the Contest started, its on hold now and I am working on the P-39 Airacorba a true Mid Engine fighter and racer for the contest. Its taken awhile to work out the details and I have a couple of versions of the drive train to test. I'll post results soon.

RK Flyer

RK Flyer wrote:
I started the Stilleto about a month before the Contest started, its on hold now and I am working on the P-39 Airacorba a true Mid Engine fighter and racer for the contest. Its taken awhile to work out the details and I have a couple of versions of the drive train to test. I'll post results soon.

RK Flyer

I can't wait to see what you come up with.

Jim