Dennis Persyk Rv6 Project


I met fellow RV-List member, Dennis Persyk, at the Chicago Area RVaitors annual Picnic at Casa De Aero.  This also happens to be Dennis's home and field (lucky guy).  About midway through the picnic Dennis volunteered to take about 15 - 20 of us slobbering souls across the runway to his Hanger/Home to see his RV6A project in progress.

First off, let me tell you that Dennis has a fabulous workshop.  It's a huge hanger with enough room to storeWe should all be this organized three complete RV's!  It's heated and air-conditioned!  It's even got a pretty yellow floor so he can find the rivets that fall on the floor.  He's got plenty of room to spread his work out.....even with that gorgeous looking Cessna 172.  Dennis gave a detailed tour and graciously answered any and all questions about his project.  He could have probably used a tour guide given the size of the group.  You'd think that grown adults would mind their manners when they are in someone else's home/shop.  But noooooo, just like a bunch of kids in a candy store, we all headed in different directions calling out across the room all at once, "Hey Dennis, what's this?"  "Hey Dennis, how & why did you do that?"  "Hey Dennis, is this a portable spray booth?"  Then everyone saw that lovely engine sitting on the stand and ran over there shoutingPersyk VFR Panel questions, all the while Dennis was giving a description of his panel.  

The panel demo was great!!  Dennis had many of the gauges operational and he gave a demo of the VM1000.  Most of use had never actually seen one working with numbers on it.  So often you just get to see the panels of planes parked on the ramp.  

Updated 2/23/00 - Here are a few pics of the removable panel parts
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Dennis had an interesting idea to help with panel lighting.  Look closely at the inside of the canopy.  See those wires on the left?  They run to a light strip that covers the whole width of the canopy.  It was too bright in the shop to get a good demo, but Dennis says it helps light the panel up very nicely and it was cheap too!  J.C. Whitney, if I remember.  Hook up a dimmer and you're all set.  Cool.  For flight instrument lights this RV is using post light.  I'm interested in seeing how that looks at night.

O360 on engine standDennis wanted me to give credit to his neighbor, John Perry, at Casa De Aero for helping him build the engine baffling that you see in the photo's.

Like always, I was so engrossed in asking questions and looking things over, that I didn't get enough pictures.  Dennis has graciously invited my wife Beth and I back whenever we can make it.  I'll impose myself at that time and try to get some more pictures of additional good ideas he has.

FuslgStand.JPG (102383 bytes)In addition to his nice fuselage stand and engine stand, Dennis had a very nice wing stand, portable paint booth and wing carrying handles.  He has also installed the Gertz Aero Elevator Trim modification.  As I said, all of these pictures will have to wait for the next visit.

Update 2/23/00 - The Gretz electric elevator retrofit

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Update - 2/23/00

I had the opportunity to visit Dennis and his project again.  There were so many things I could have photographed.  In addition to the pictures above here are a few other things that I noticed on my brief visit. 

 

DCP00838.JPG (102207 bytes)This is the heater control unit.  It appears to be well constructed but Dennis is concerned about the design.  If the heat is turned off there is no outlet for the hot air and the heat will stay in the muff and possibly burn them up.
DCP00832.JPG (104087 bytes)Here is a view of the gascolator and fuel flow transducer.  There are is some unique plumbing taking place in order to get a straight 4" section immediately prior to the Vision transducer.  All the bends are perfect.  Beautiful!

N600DP_Finished.jpg (222685 bytes) Here is N600DP in it's completed state.  There are still some fiberglass fairing that need to be completed and Dennis is currently looking for a good Paint Shop to add the finishing touches.

NAVAID Autopilot Induced Wing Rocking 

Recently, there has been some discussion regarding some idiosyncrasies in the Navaid Devices autopilot.  Some installations don't have any problems while other installations have problems similar to what you see in these video captures.  The purpose of these files is not to "beat up" or "flame" the Navaid Devices autopilot, it's a fine and necessary piece of equipment to most experimental airplane builders.  Rather, our intent is to prompt some discussion on how to alleviate the various problems that occur during some installations.

The following 3 AVIs files were  made to document the autopilot-induced wing rocking that occurs when the NavAid Devices autopilot is engaged in N600DP, an RV6A.

All three files are around 3mb in size and can take quite a while to download on a dialup connection.  If you only want to look at one of them, I would suggest the 3rd one.  It seems to demonstrate the "wing rocking" phenomenon the best.

Each movie starts with a short sequence with the airplane being flown hands-off while the autopilot is not engaged to demonstrate that the airplane is in proper trim. The autopilot is then engaged, and the wing rocking begins.

The temporary solution to this problem  has been to crank in a little aileron trim and force the Navaid Device to fight the un-necessary  trim.  This seems to dampen the oscillations and stop the wing rocking.  The drawback to this solution is an un-commanded roll that need to be addressed immediately, when the Navaid Device is disconnected.

So click on a picture, get yourself some dinner, then take a look at this interesting problem with the Navaid Devices autopilot.

 1.  View of the right wing from the cockpit showing wing rocking. WingRock1.jpg (9387 bytes) Better

2.  View of the horizon over the nose showing wing rocking. WingRock2.jpg (9486 bytes) Good

3.  Another (better) view of the right wing from the cockpit showing wing rocking.WingRock3.jpg (9487 bytes) Best