CEF Profile Scale Speed rules.

2015 Profile Scale Speed rules:

Models will be of an actual aircraft type and must be recognizable as the subject being modeled. The model may be painted/covered in the scheme of your choosing, the paint/covering does not need to replicate an actual aircraft.

Minimum wingspan 15 inches, biplanes 12.5 inches, minimum wing area 45 square inches, minimum length 12 inches. Length is measured from the face of the prop drive plate to the rearmost part of the model. Fuselage will be of the profile type, meaning a flat "plank" or "slab".

Engine cowlings are not only permitted, they are encouraged to enhance the scale appearance of the model. Cowlings on models with the cylinder aligned horizontally must leave the entire glow head exposed and no part if the cowling will extend past that point. Vertically aligned cylinders may be fully enclosed if they fall within the scale outline of the aircraft bring modeled "Cheek blocks" or "nacelles" will not extend more than 3&3/8 inches past the back of the engine crankcase. The back of the crankcase on a reed valve engine is where the tank or backplate mates to the engine.


All controls, bellcrank, leadouts if used, and pushrod will be exposed and visible.

If building a model of a fixed gear aircraft the model must have a landing gear similar to the full scale aircraft, the gear does not need to be in the scale location. Models of aircraft with retractable landing gear may omit the landing gear entirely. Take off dollys may be used, hand or stooge launching is also permitted.

Any .049/.051 reed valve engine or combination of engines totaling not more than .051 assembled from reed valve crankcases with cox parts or reproduction parts of the type sold by Cox International and EX Model Engines will be  permitted.

http://coxengines.ca
http://www.exmodelengines.com

Aftermarket fine thread needle valve assemblies will also be permitted. Entrants may make their own reeds. Any style glow head or glow plug may be used. Engines will be run "open faced", meaning no mufflers or exhaust extensions will be permitted. After market prop nut type spinners may be used.

Engines may be of the integrated tank "Bee" type or use an external tank or bladder. External tanks and bladders may be enclosed within the engine nacelle.

Models in the Tee Dee class may use any cox .049/.051 engine or combination of engines totaling not more than .051 assembled from cox parts or aftermarket parts of the type sold by Cox International and EX Model Engines may be used.

http://coxengines.ca
http://www.exmodelengines.com

Aftermarket needle valves, glow heads/plugs, carb bodies, and spinners may be used.
Engines will be run "open faced" with no mufflers or exhaust extensions.

There will be no restrictions on propellers used in either class.

Fuel will have a maximum nitromethane content of 35%

Models will be flown on lines that are a minimum of 35 feet from the handle to the center line of the model and timed for 12 laps (1/2 mile) after becoming airborne and the engine has had a chance to "unload".

You may submit more than one entry but each entry must have its own engine, no swapping engines from model to model.

Models that have placed in the top three in a previous contest may not be re-entered.

Photographs of finished, flight ready models must be posted by Monday, December 14th 2015 in order to qualify. A separate thread for qualifying model photos will be opened October 1st. Models will be judged by a polling of members for "best model".  An official flight video must be submitted to win the best model poll.

Competitors will have until midnight Thurday, December 31st to submit video of your official flight via private message to JpVelo. Flight videos may be submitted at any time between now and December 31st. Submit only one video per model, once your video is submitted it is your official run and cannot be withdrawn and replaced with a new video. Models may be flown by the builder or flown by proxy.

Video will include launch and landing. You are allowed to "whip" the model as much as needed to get it safely in the air and up to speed. When you are satisfied the engine has unloaded and you are going  max speed you will raise your hand over your head. The signal to start timing will be when you drop your hand. Timing begins the first time the model passes between the camera and the pilot after the signal. The pilot must be in the video and the hand signal must be clear. Timing will be for 12 laps (1/2 mile).


Here's the sample video:



When you private message the video to me send the URL code only, that will look like this:
https://youtu.be/c5HjoIOtmoU
This will make it easier for me to send the videos to the judges.




Jim