All Blog Posts (1,908)

More form blocks

Got my form blocks done for the tail section today. Now just waiting for my fluting pliers & bulk pack of rivets...should have most of my rudder parts formed (and maybe assembled) within a couple of weeks. Can't believe it took this long to get going! Got my rolled aluminum sheet, Cortec primer and hardware from Zenith just before about 8 solid hours of work in this weekend.

Added by Greg Harris on November 27, 2011 at 4:00pm — No Comments

Wing parts fabrication

Cut out the 8 flaperon brackets and 8 slat supports from 0.090".  I don't have a bandsaw, but it's amazing what you can do with a table mounted circular saw, a belt sander and some patience...

Tried the new 5.5" solid rivet driver on the remaining spar rivets on the starboard spar.  Found it tends to kick around more than the short heads, so even more care has to be taken.

Added by Marty de la Motte on November 22, 2011 at 4:53pm — No Comments

O-540 Lycoming in 801

has anyone installed a 540 Lycoming in an 801?

Karl Hipp

Added by karl hipp on November 19, 2011 at 2:48pm — 2 Comments

Aeromax engines

Is anybody fliying behind an Aeromax light duty engine?  Any outstanding things, good or bad? How many hours?   How was woprking with Bill Clapp?     Thanks

Added by Ralph Sonnicksen on November 19, 2011 at 1:07pm — 4 Comments


does any one have info on the older style air operated retrac system for amphib floats i am trying to get mine on but can not find any info !!!!????

Added by rodney sheridan on November 18, 2011 at 7:06pm — No Comments

Zenair Calendar Now Available!

To order use drop down tab for Zenair News at top of page; select 'subscribe' and scroll to bottom of page and click on calendar for price and information. You do not need to be a newsletter subscriber to purchase. …


Added by Zenair News on November 16, 2011 at 10:52pm — No Comments


We have hit a milestone today, we got her on wheels

Added by david shrader on November 16, 2011 at 10:34pm — 2 Comments

hardware kit for 750

Is there a hardware kit from Zenith that has all the AN bolts washers and what not, and how much is it.

Added by Jesse Hartman on November 16, 2011 at 3:23pm — 6 Comments



I'm looking for a set of wheel skis for a 701, any contact information would be appreciated.



Added by Cliff Pilgrim on November 16, 2011 at 5:52am — 4 Comments

EAA Wants Your Help

The following is from November 2011 issue of Experimenter, EAA's Homebuilder e-Newsletter:

EAA Experimenter is about you, the homebuilder. Whether you are building or flying an experimental aircraft, we need your story! If you don't think you have a…


Added by Zenith.Aero on November 15, 2011 at 4:30pm — No Comments

Wing spars

Commenced solid riveting on wing spars.  Almost completed one spar - found it difficult to set the rivets along the top of the spar doubler because of the bend at the top, so have ordered a 5.5" head which should be long enough to prevent the spring on the air gun from hitting the bent section when setting.

Happy with most of the rivets - had a couple that I had to drill out and re-set because of damage to the head caused by the gun slipping, but 99% worked fine.

Also cut the…


Added by Marty de la Motte on November 13, 2011 at 5:06pm — 4 Comments

Looking for a William Wynne Corvair engine

Looking for one already built up so I could install it this winter.  Fuselage about all done except engine controls.

Added by Ralph Sonnicksen on November 11, 2011 at 7:31pm — 2 Comments

Nice touch-up to the site format

I find things more readable. Good job!

Added by Jim B Belcher on November 11, 2011 at 8:11am — No Comments

UL350is performance in hotter climates

Phoenix hot i mean;)  Since i'm just putting wings together, I will need a fuel return line if I chose the UL engine.  So my decision may come sooner than i had planned.


Does anyone know of any cooling issues with this engine similar to others?   I'll be flying mainly in the Phoenix area.


Also, Are the 650 extended range tanks plumbed for a return line?


Thanks mucho!!  



Added by Peter Keast on November 10, 2011 at 3:22pm — 1 Comment

UL Motor Mount for the 701?

Is there anyone currently making a 701 motor mount for UL power?

Added by John Edwards on November 10, 2011 at 12:01pm — 4 Comments

Zenith CH 650 vs. Sonex: "Competitive Comparison"

The following is an unusual post because I don't normally comment negatively about competitors.  Competition is good for any industry, forcing us to be innovative and efficient, and there is a place and market for many different airplane designs (and the companies that manufacture them): The current issue of Kitplanes magazine (December 2011) contains the annual Buyer's Guide with 316 different kit aircraft listed (from nearly as many manufacturers)!

The letter that…


Added by Sebastien Heintz on November 8, 2011 at 7:30pm — 9 Comments

Thanks So Much for the "More" Button!

I've been wishing for the last year and a half to be able to see recent posts.  I go on every day (almost), but they still get past me sometimes.

Added by Joseph F. Truncale on November 7, 2011 at 4:09pm — 1 Comment

100 Hrs In

This weekend marked the 100th hour of build time and the official start of the wings. Thanks to a bunch of rookie mistakes and some plain old carelessness I think I am probably about 20-25 hours behind a "normal" build time (whatever that is) but I am quite pleased with what I've managed to do: the rudder, the slats, the flaperons, the horizontal stab, the elevator, and the nose ribs/slat support assemblies.



Added by Paul Sanders on November 7, 2011 at 4:01pm — 1 Comment

Adding fuel return fitting

I'm building the wings on my 650  and the fuel return fitting in on the outboard end of the tank, I talked with Zenith and they said something about that end is better to prevent condensation from getting into the tank from the return line???

Anyway, instead of running a long fuel return line outboard to the next lightening hole I'm considering welding a return fitting in the upper inboard end of my tanks.

Has anyone else done this or is there any reason I shouldn't do…


Added by Tom Neal on November 7, 2011 at 7:39am — 1 Comment

Fuel injected engines

In a previous blog about the ULPower engine in the 650 there was a discussion about fuel use.  Since these engines use fuel to cool the injectors and send the excess fuel by return line back to the tanks I was wondering how the GPH fuel use is determined. Seems that a fuel flow sensor in the line to the engine would not give a correct reading.  Just wondered how it was done.

Added by Joe McGough on November 6, 2011 at 10:30pm — 5 Comments

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