Marc Zeitlin

Makes sense, but how often do you do that?

 

I haven't used my parking brake since the plane left the patio. In retrospect I think I'd have left it out.

You haven't flown anywhere yet, either. I've flown into a number of airports at which the parking brake came in very handy. Given the minor cost and effort, it's more than worth it.

I've also wondered about a skylight, or at least BIGGER windows in the rear. How claustrophobic is it back there?

The comments I've had from people sitting in the back is that they'd like it if the rear window sets came down LOWER than they do now - a few inches. It seems as though it's difficult to see the ground over the lower rim of the windows. 2" would make a big difference, I think.

 

A skylight would only let you look straight up, which isn't very interesting unless you've got the rear seater watching for falling Space Shuttle parts. It's not dark back there - just small.

Originally posted by Steve_Innova

1.) I'm planning on a "short field" Cozy IV. I want to install "aerodynamic flow fences" on the wing trailing edges. I'm hoping that it will lower the landing speed / stall speed by 5-7 kts. Here's the link, has anyone else tried this with any success?

Klaus's fences work well on V.E.'s, but apparently have almost no effect on the L.E.'s that they've been tried on. Since a COZY is substantially more similar to a L.E. than it is to a V.E. (aerodynamically), the assumption is that these fences will have almost no effect on a COZY as well.

 

Originally posted by Steve_Innova

2.) Retractable Main Gear: I want to use the retractable landing gear, since that will put the gear out on the strakes and out of line of the prop, preventing debris from being kicked up into the prob on landing/takeoff.

 

There may be good reasons to install retracts, but FOD of the prop isn't one of them. The stock main gear are already well outside of the prop arc, and it's the nose gear that kicks crap up, not the mains, especially if you've got wheel pants.

 

Originally posted by Steve_Innova

3.) Nose Gear Mods: I'm thinking about installing a "mud flap" directly behind the nose gear.

There are a few V.E.'s and L.E.'s that have this - I don't know that I've ever seen it on a COZY, but there's certainly no reason not to do it. Many people taxi with the landing brake down to prevent nose gear crap kick-up damage to the prop.

 

Originally posted by Steve_Innova

4.) Laser rangefinder in the nose, for terrain distance on landing. With a nose up attitude, it would be nice to see precise altitude on the panel.

Ummm, this is WAY overkill. Visibility in a COZY is great, and even on landing, you can see the ground just fine. If you can land a C-172 with the nose up, you can land a COZY with the nose up.

 

The biggest issue you're going to have with a "short field" (and you haven't defined what you think is short) COZY is takeoff, not landing.

 

P.S. - with respect to your other question regarding finding COZY builders in your area, click on the link below, check out the mailing list link, and join the COZY mailing list.

Originally posted by Ted Barstow

I believe the Cozy MKIV has been approved as a two place, and is in the process of being approved as a four place. It may be the only canard approved in GB.

There are numerous L.E.'s flying in the UK.

Originally posted by John Slade

... trying to find a DAR that charges less than $1500 ....

Amazing. The FAA FSDO up here did the inspection and all the paperwork for free. My tax dollars at work, I guess. For that much money, you should truck the plane up here to MA, have it inspected, and then truck it back. As Chris said, I've always heard #'s in the $300 - $400 range.....

Originally posted by chuckthedog

If a Cozy pilot flying solo point "A" flys someplace, and picks up a friend point "B", leaves his ballast there. Flys friend to point "C", and drops him off. Where or how does he get ballast to continue his flight solo?

I remove my ballast from the nose and store it under the rear seat (right on the CG) when it's not in use. It's always with me.

Originally posted by shender1

Does anyone know where I can find specs on the Defiant.....I would greatly appreciate anyone who could point to a web site with this info.....Are there 2 models of the Defiant and if so what are the differences between them?

There are a few people (Harry Manvel among them) that hang out on the canard-aviators mailing list that are flying or building Defiants. Other than flying next to Harry on the trip from SQF to MQI the day before the Airventure Cup race, and looking over his plane, I know virtually nothing about the Defiant (other than it's slower than a COZY :-) ). I don't believe there are any Defiant builders/flyers on this forum. Your best bet is to contact people that have them.

Originally posted by Spodman

Wouldn't you get more pressure from a ram-air duct in the extreme nose, or would any extra airflow be absorbed by longer ducting?

Yup, but I'll tell you, with the large, plastic vents and the stock NACA side ducts, I can just about blow myself through the front seatback with the airflow by the time I get up to flying speed. If there were any more air coming in, everything in the cabin would be floating all over the place.

 

I did move my vents to a point directly behind the elevators, as it lined up with my vent location better, but I don't think that made much of a difference in pressure recovery.

Originally posted by steve

....She has bipoler and she red in the book that she can't get a 3 class. is that true ?

FAR 67.307 (a)(3) specifically prohibits those with clinically diagnosed bipolar disorder from getting a 3rd class medical.

 

Originally posted by steve

.....and if so what r her opitions and most of all can she or should she lie.....

How good an idea do you think it is to lie to a federal agency?

 

Originally posted by steve

......its all new to me. I see no harm,in her flying my cozy when its done.

You can let anyone you want fly your plane, as long as a pilot is in it at the time. As Mike said, it certainly can't hurt to have her take the ground school and flight training as well for emergency purposes.

 

And for Jim Sower, (who should know better) there's no such thing as a pilot's "license" - it's a "certificate" :-). And no, you don't need a medical for dual or ground school.

 

Also, it is possible to get a pilot certificate without any medical certificate - glider and motorglider certificates do not need medicals.

Originally posted by cozybuildertobe

... Does the Cozy MK IV have a rating or ever been rated?

Vne for the COZY MKIV is 220 mph IAS, per the Owners Manual and published information (stated as "Max. Speed", usually).

 

Originally posted by cozybuildertobe

I imagine being a plans built it would depend largely on quality of build etc, but is there a guideline that would help me make a decision?

Vne is not dependent upon builder - it's 220 mph, period, unless the builder wants to test at higher speeds (and is then completely on his own).

Originally posted by clifford

Jack Wilhelmsons unit is more compact than Steve Wrights and also weighs a little less. It may not be as robust though. It doesn't have that spring on the end as Steves does....

Jack's unit has the spring internally - it's just not visible. What makes you think it's not as robust?

Originally posted by Joe Patterson

I can't quite get my head around..-----> {How all this by M.Z.below is less work , than a simple "YES".}

In the short term, it's more work. If people become educated as to the information sources available to them, then in the long term it's less work.

 

Originally posted by Joe Patterson

So none will think me LAZY.....I have been searching and reading for 6-8 FREAKING HOURS>>>>>>>>>>>>>>>>>>To find this information out.(I am near tears here).........THANKS

Listen - Mike is right, in a couple of senses. First, people managed to build these planes before the internet existed, and they had NO "builder support networks" other than the RAF or Nat, and maybe the quarterly paper CSA newsletter. Secondly, even if ALL you had in front of you was the plans, and nothing else, you could build a perfectly good plane, either reading ahead or just doing whatever the next paragraph said to do. I did exactly that with the Q2 I built - I talked to the factory twice, and no-one else ever during the 4 year build.

 

I'm a read-ahead kind of guy - I bought my plans in late 1994, and spent approximately 100 hours reading them and the newsletters over and over and over and over and over again before I started building. Mike is the opposite - he does what the next paragraph says, and that works for him - that's great.

 

It's not a question of "lazy". You sound to be more like me from a preparation standpoint than like Mike - if that's the case, then I just think that you haven't quite gotten your head around just how much work this project is, both from a mental and physical standpoint.

 

If nothing else, when you ask a question, TELL people that you've searched the plans / newsletters / on-line data for the information that you're asking for, so that they KNOW that you're not asking for them to do YOUR work for you - then they'll be more than happy to help out.

 

All of this goes for all the new builders out there, obviously - not just Joseph.

Originally posted by Joe Patterson

Yeah, however..telling him to put on a hook, some bait and throw it in the water.........ISN"T teaching him anything. Seaches on the internet, drive me Insane.

Two of the three information sources I pointed you to are paper and are sitting on your desk/table. The FAQ and archives are hardly internet searches - I gave you the URL's, all you have to do was click on them and read.

 

Originally posted by Joe Patterson

Marc, I wonder if this would have been better said to me in a private manner.

The answers to these questions might be interesting to others - why limit the info?

 

Originally posted by Joe Patterson

I,being new to computers,have a horrible time trying to find stuff in search engines. I will muttle through. I suppose I could read, more. I do seem to ask the first question that pops into my head. Please don't waste any more of your time reading or answering my posts, If in any way you think them childish.

The questions aren't childish, they're just easily available to you without making anyone else do any work - I think part of the responsibility of mail list/forum users when on an information search is to ensure that they're not using others to do their work for them, and have at least done a cursory look at available information. I was pointing you toward useful information sources, both for your current (and future) questions.

 

Originally posted by Joe Patterson

....He comes across very arrogant, in the way he speaks to others simply because HE doesn't understand the complications others have.

Not the first time I've heard that, and I will endeavor to minimize the appearance of arrogance. I apologize, since that was not my intent.

 

Originally posted by Joe Patterson

The information is not "That easy to Find".I don't want to speak ill of whoever writes the the newsletter,or the author and composer of the "Plans" or Peoples responces to "Posts"..........but all could be a bit more Informaive.

The COZY plans are about the best you'll find on the market - Burt and Nat did a GREAT job. That's not to say they can't be improved - they can - but reading them through a couple of times before you start building can only help you in understanding what everything is and how it goes together. The newsletters are mostly fluff, but the "supplier" and "mandatory changes" sections are very useful.

 

Originally posted by Joe Patterson

Are both, Steve Wright & Jack Wilhelmson......Authorized Suppliers of the Cozy Mark IV Electric Nose Gear? and.....Are they the only Authorized Suppliers of such?

Yes.

Originally posted by Joe Patterson

1.) What is a Nose Strut?

2.) Who is the Supplier for the Electric Nose Lift?

2A.)Steve Wright & Jack WIlhelmson?

1) Read Chapter 13 (In fact, all your questions regarding materials and parts will be answered by reading the plans)

 

2) See the COZY newsletters you received when you purchased the plans, or see:

 

http://www.cozybuilders.org/newsletters/

 

There are other noselift suppliers as well that you can find by judicious searching of CSA newsletters or the COZY archives, but these are the two biggies.

 

3) Well, you didn't ask three questions here, but you've asked a lot of others that can be answered by:

 

Read the COZY builders FAQ and archives, at:

 

http://www.cozybuilders.org/mail_list/

 

 

Give a man a fish.... Teach a man to fish.... etc.

Originally posted by mlefebvre

Marc, those are exactly what I am thinking about....

Also see:

 

http://x-jets.com/products3.html

Originally posted by cncdoc

OK.

 

I respect the man. And his credendtials. But when I say his name (never on vain) is it with a Zeee sound (long e) or a Zye sound (long i) ????

 

just curious.

Respect or not, you're never gonna see my "credendtials", so don't mention them again. :-). Credentials, however are public info.

 

At any rate, since Mike saw fit to name the thread after me, it only seems right that I should tell you how to say it. Usually, the pronunciation isn't the problem, it's the spelling - when this happens, I tell them it's spelled "S - M - I - T - H", - they're all silent, except for the "M", which is pronounced "Zeitlin".

 

Of course, that doesn't work on-line, since all you can see is the "Zeitlin", and you can't hear the pronunciation, so I'll just have to tell you.

 

It's Zeit (as in "bite") lin (as in "in"). Long "i".

 

Howzzat?

Originally posted by Rui

....and found that the advertised 1g accuracy is rather optomistic...... but the display just tricks you into thinking its more accurate.

I suggest that everyone wondering about scales and pumps read the following web pages on the difference between "accuracy" and "precision". There seems to be some confusion regarding the definitions of these terms with respect to the needs we have when mixing epoxy.

 

http://www.hcc.hawaii.edu/distance/sci122/SciLab/L5/accprec.html

 

http://www.wl.k12.in.us/es/concepts/shosys25.htm

 

When using a scale, we care about accuracy and precision, so that we get the appropriate mixing ratios - we don't really care about precision alone, because whether I mix 8.1 OZ of epoxy or 8.2 OZ or epoxy is meaningless.

 

With a pump, the accuracy of the RATIO is important, but the accuracy of the weight of each pump is meaningless. Precision doesn't factor in, because we're not measuring anything.

Originally posted by Joe Patterson

Do you think 2 gram increments will suffice?

Let's assume that the smallest batch of epoxy you'd ever like to mix is on the order of 1 OZ or so - I think that's pretty close to one pump from my pump. Maybe it's smaller, but let's use that for sake of argument. If 1/3 of the volume is hardener, that leaves us with 1/3 OZ of hardener (approximately). 1 OZ = 28.6 gm, so 1/3 OZ ~= 9.5 gm. If the resolution (to say nothing of the accuracy) of your scale is 2 gm, then the best you can do is about 22% error in the measuring of your hardener. If you're 11% off in the measuring of your resin in the other direction (2/3 of the volume), then you're approximately 33% off in the ratio in the worst case in small batches.

 

There's certainly some leeway in mixing epoxy - it doesn't have to be perfect, but 33% off is not something I'd build a plane with. I have a pump - I wouldn't be without it.

Originally posted by Jim Sower

.... If I'm not badly mistaken, the instrument panel's "structural" mission, aside from supporting the instruments, has a whole lot more to do with crashing than flying. ..... The loads on it during normal flight are not severe at all.

The concept of "structural" involves two basic ideas - strength and stiffness. While you are certainly correct that the IP (and, in fact, almost ALL the bulkheads) are very lightly loaded in normal use, and therefore the stresses are low and the strength requirements are also low, there's stiffness to be considered.

 

The fuselage, especially of the COZY, is an open "C" shape (opening "up"), and has very little intrinsic torsional stiffness. The bulkheads provide most of the torsional resistance to "racking" of the fuselage, and this is important to maintain the relative positions and angles of the canard and main wing.

 

That being said, wrt replacing the IP with something else, as long as the Aluminum (or whatever) seperate IP piece is bolted to the fuselage in such a way that it CANNOT move wrt the fuselage under any loading, it will fullfill it's job and stiffen the fuselage. Just ensure that the mounting system (bolts, pins, etc.) is reinforced at the mounting points and that there's no slop.

Originally posted by ekisbey

Not to patronize anyone unintentionally, but unless I'm mistaken, 99 dB is (ideally) twice as loud as 96 dB... And I'll admit un-ashamedly that I had to look that up to refresh my memory.

 

Well, it's not patronizing, because it's not correct :-). A 3 dB difference is twice the acoustic POWER, but NOT twice the "loudness", or perceived noise level. If you played two noises, one 3 dB louder than the other, right after one another, you'd probably be able to say which one was louder than the other, but it wouldn't bowl you over with the difference. If you played them 1/2 hour apart, you would not be able to tell which was louder.

 

Your ear perceives things logarithmically (approximately), so even twice the acoustic power is not always perceivable. Now, a 6 dB difference WILL be noticable.

 

At any rate, the #'s shown here are not substantially different from the ones indicated in No4's links (no problem at all with links - they're just pointers to the original information). The 99dB of the Lancair and the 96 dB of the COZY wouldn't really be noticeably different, and the 96 dB of the COZY and the 93.5 dB of the C-150 (from the link) wouldn't be that different either.

 

Personally, I can't tell any major difference between the C-172's, Katanas and Warriors that I used to fly and the COZY. I ALWAYS use an ANR headset - wouldn't fly without one. ALL of these airplanes are way too loud to be flown in without hearing protection, and you'll NEVER get the sound level below that which you get with ANR headphones any other way.

In order to achieve full utility, you will have to ensure that all information is provided upon signup (address, phone #, real name, etc.), which I believe the software can ensure, but then you will also have to ensure that this information is only available to members of the forum, so that guests cannot obtain it. I have no idea if the software has that ability to restrict access.....

This is something that has bothered me about the forum for a long time, and has been mentioned a number of times in other posts by many others.

 

On the other hand, when you join the COZY mailing list, one of the things that you get is a database of all the builders/flyers on the mailing list, and their addresses/phone #'s, specifically so that you can contact people near you (or far away from you if you're away from home).

Originally posted by Cozylover

Anybody else to confirm the above...?

 

There's "chrome" cylinders, and chrome on the rocker covers. They're two different things - I think Chuck is referring to the first. I'm no engine expert, but it's possible (and I've heard A&P's mention) that cylinders that have had the barrels chromed may run hotter during break in than unchromed cylinders, and this seems to match with what Chuck has heard.

 

On the other hand, it's __extremely__ difficult for me to believe that any appreciable heat is dissapated through the rocker covers, and that any coating, be it paint, chrome, or anything else might have any measurable effect on CHT's.

 

Not to mention that about 1/2 of the show planes that you see at OSH have chromed rocker covers. They look great.

These are two very different questions.

 

Originally posted by Jon Matcho

What does everyong think about adding a Chat Room to the forum?

I think it would be an excellent idea.

 

Originally posted by Jon Matcho

Would you use it?

 

Not at all.

 

Since there are two questions here, the Poll is misleading. I'd definitely vote FOR a chat room, however.

Originally posted by clifford

Hey LP! Don't piss off Marc or he will banish you from HIS site....

LP is not a contributing member of the COZY mailing list. In 9 years of administering the COZY list, only two people have been removed involuntarily, and those were ONLY for being disrespectful to other members multiple times, after being warned.

 

Originally posted by clifford

like he did me!

 

Hmmm. Here's your post from December 3, 2003, in the "MGS Epoxy fumes - flamable?" thread:

 

Reference is to the Cozy news group you rule over( sorry I mean moderate.) If you ever wonder why few people with some time under their belt don't bother to contribute to any discussions on your forum, just take a look at your first response. You most always belittle questions that have been asked before with the standard "why do you ask about this?? If you read the archives you will find your answer posted in the October 1996 archives!!" Then go on to explain how smart you are with your quotes and statistics, when in fact you are being nothing more than a smart-ass. Get with it Marc!!

I guess I misinterpreted this diatribe as a request to be removed from the useless and information free COZY mailing list. If I misunderstood you, and you'd like to be reinstated, just send me an email and I'll be happy to add you back in. My bad.