macleodm3

Answer:Everything changes as a system. Taller trees need bigger roots or they fall over. Can't just make it bigger... cause lots of things change

You may really like the Weight and Balance spreadsheet the Marc Zeitlin has provided for us on his Unofficial Cozy website. Just now, I opened it up and I put my weight in as 180, copilot as 180, changed fuel to 20 gallons, and then was able to add 500 lbs in the rear seat baggage area. 500 lbs!!! Do you need more weight capacity than that? I'm good to go for 400 miles with a quarter ton in the backseat area.

This conversation is very hard to follow.... what language is this?

I can tell West 105 with 205 or 206 is easy to sand when I have small glob (9 sq inches or less) to sand down. Yes, it does sand OK and its evident with small spots. You wouldn't know its easier to sand when using a 36" x 4" 3M sanding board for hours and hours on a wing surface.... my Gosh I can't imagine what MGS must be like!!! I REALLY DREAD sanding the vertical surfaces... winglets and fuselage sides. With a strake or a wing you can lean in to the sanding board... not gonna be as easy on the next several surfaces which are vertical. I do have a used Ingersoll Rand IR315 air file arriving here Friday.... This will help knock down the high spots and give me a fighting chance. As mentioned by others.... you can do 3 hours worth of sanding in 1 hour if you catch the West 105 before it cures.... my timeframe is spread it out (better be quick), then try to get back to sand in 3 to 4 hours (using fast 205).

Putting vents / holes in the heat duct may not be OK... it also serves as the keel / center structural member. The plans state "The center keel provides strength for the fuselage and contains the hot air duct. It forms the base of the center control console and contains hard points for mounting the safety belts." If you determine its OK to put vents or holes in to the center keel / heat duct, then it would be EZ to install two eyeball vents where the rear passengers can reach them. The plans design uses the higher air pressure inside the lower engine cowl to push hot air through the heat duct up to the front of the plane. What pressure are you planning to use to get air to flow through your heat duct?

1.) Consider a Cozy MKIV.... side by side front seating is very nice for some people and the cost / work is similar. 2.) You can buy a good flying Long-EZ or Cozy for the same that it will cost to build one. Just make certain to get a PPI from one of the recommended people. Just ask, we'll help you find one. 3.) The Long-EZ and Cozy designs are very mature.... meaning they are well proven and there should be no unpleasant surprises if you follow the plans. 4.) Build because you want to build... not because you want to get flying for less cost. I have no regrets tackling a Cozy build, but it wasn't a cheap and easy way to go flying. If you decide to do this.... its a lot of fun!

I can't get that link to work... is it me?

I have Aerocad wings, main spar, and turtleback on my Cozy MKIV and they were built while Jeff had the company. The parts are very nice but aren't perfect.... they are better (more straight) than I could build. I also have parts from Featherlite.... again... very nice parts, better than I could build but not perfect.

Also, the Aerocanard plans don't include the use of Triax.... it was only used on a few prefabricated parts built by Aerocad for the Cozy or Aerocanard (wings). The Aerocanard plans use the same materials as the Cozy MKIV.

Do you get good service life out of these? I'll be needing 4 of them in the future. It looks like Dynon markets them for $38 each, how much does it cost you to build one? Do you also build your own EGT sensors?

You have made some fast progress!! Keep it up and you'll have an airplane!

Some people want a yoke in their EZ / Cozy....

Looks like he stopped building in 2011... ah well, thats too bad. Gary Hunter inspected some of his work and his comments are on that web page... sounds like good quality work. I hope he is able to sell both projects.... agree they could be good deals.

Hmmm... not a bad idea! Just skip the control system. All you need is an aileron servo and an elevator servo. Add a throttle servo and now you've got yourself a large RC aircraft that you can ride in.

I find it amazing that you built so many of the parts yourself... engine mount, cowlings.... many many more bits and pieces. Glad you are enjoying it!

This has not been done in a Long-EZ. If you wanted to do this, you would need to re-design a major portion of the fuselage OR the control system since the Long-EZ control system is torque tubes and push rods that are located along the side of the fuselage. You basically sit on the floor of the Long-EZ, so there is no room to run the controls under the seats. See attached image for details....

Figure out a way to use approved epoxy. There is a Cozy for sale that nobody will buy because it was built with un-approved epoxy. West is only approved with very slow (209) for layups. The faster hardeners can exotherm on some layups... so I suppose if an epoxy system can't be used for the entire build then it wasn't approved. That being said, if you build with MGS and use all fast hardener you might get exotherm too.

I will answer that with my best guess at the answer.... 1.) West System 105 Resin with 209 Hardener is an approved laminating system for the RAF Long-EZ / Cozy type builds. 2.) 105 Product Description - "105 Resin is a clear, low-viscosity liquid epoxy resin. Formulated for use with one of four WEST SYSTEM hardeners, it can be cured in a wide temperature range to form a high-strength solid with excellent moisture resistance" 209 Product Description - "209 Extra Slow Hardener is formulated for general coating and bonding applications in extremely warm and/or humid conditions or when extended working time is desired at room temperature. Provides approximately twice the working time of 206 Slow Hardener. 105/209 forms a high-strength, moisture-resistant solid with excellent bonding and barrier coating properties." So, yeah, 105/209 is RAF approved, and according to the manufacturer it has excellent moisture resistance. I don't have a clue what "moisture resistance" means, because all of our cured epoxies have excellent moisture resistance... and none of them have moisture resistance while being mixed / cured. Interesting to me is that 209 is formulated for use in "warm and/or humid conditions"... that may be a good reason to use the product. Was that a good guess?

That post mentioning EZ Poxy is not referring to your aircraft project for sale... it is referring to a different project in earlier posts that may have had some portion built using vinylester resin. Also... Dennis used different epoxies at different times. He built my canard... one of the last ones he built.... and he used EZ Poxy.

"173 cm in height" 5'8".... not typically a problem. "sit in a raised position" I am guessing you are using a thick seatback cushion? "my arms are too short" like a T-rex? Are they normal length arms or do you have an unusual circumstance? "I can only just reach the handle with the tips of my fingers and my head is hitting the canopy during the tank change" THIS sounds very unsafe. This does not sound typical for a Long-EZ. "Does anyone know where I can buy an extended L / R fuel tank selector handle that I can reach more easily ?" There are many good fuel valve solutions. This may involve moving your valve, installing a different valve, or some other solution. You DO have a fixable problem here, and it does need to be addressed. Please post some photos (from different viewing perspectives) of you fuel valve installation to help everyone understand the problem and therefore recommend a solution.

If she like to fly, she should love the Cozy! Wow!!! Lucky You!!! You are actually really close to a lot of canard activity (including Cozy activity). Do an internet search for Freeflight Composites and then contact Burrall Sanders (the owner). They are close to you in Peyton, CO. In addition to being on this forum, join the Cozy Builders email list (its a Google Group managed by Marc Zeitlin).. this will give you access to a list of more than 700 members... many in your area.

Thats a good idea Kent... its not the correct engine for the MKIV, history unknown. What would that 320 be worth? $2000? $2500? Also... do get your pre-buy. We've all seen some really poor workmanship here and there (not that its normal)... you want to start with one of the best projects, not one of the worst. Do you have pictures you can share here? Price? Are you getting signed up for the email list yet?

There is an engine by Titan that they call the stroker 340... I dont know much about it, but they advertise it as a 320 thats been increased to 340 ci and its rated at 180hp. Possible, yes. Your best option? That depends on a lot of things including money. If your 320 engine has been sitting for a year or more it may have enough rust inside to warrant a rebuild. Go ahead and convert it to a 340... you'd have a lightweight 180 hp option. The options are almost limitless...

Yes... you should join the Cozy builders email list (its a Google Group ---- search for Cozy Builders on google groups). Builders and fliers monitor that list. If you join the list, you can have access to a map showing all the builders in the US. There are builders in the Detroit area that can most likely look at the project for you... Right now there are 4 places to go for Cozy information.... This Forum The Other Forum The Cozy Builders Email List (Google Group) The Canard-Aviators Email List (Yahoo Group) It may seem silly to have to check 4 places for information... but it is what it is. If you post the request to the two email lists you should get some good responses.

Ok... we are sorry for the thread drift here... We should be using the terms "parallel valve" (lightweight 360, typically 180hp) and "angle valve" (heavyweight 360, typically 200 hp). The lightweight IO-360 you listed (the L2A) is rated at only 160HP. The lightweight IO-360's are typically parallel valve engines and they are typically rated at 180 hp. If you want the additional 20HP, you need to look at the heavier (20 to 40 lbs) angle valve engines. Most builders do not build their own engine cowlings... its cheaper and much easier to buy one from Featherlite. Most EZ's and Cozy's that actually go places and fly a lot have airplane engines.