Van's Air Force - Minnesota Wing
The Twin Cities RV Builder's Group


Technical Counselors and DARS


The MN Wing is a fortunate to include some highly experienced RV building experts. They will be more than willing to answer your questions regarding the construction of your aircraft.

Tom Berge, Plymouth, MN, 763-541-9306.

Tom has been flying his RV-6 for over 10 years. He has inspected many projects and is available to advise any MN Wing member on questions regarding building your project, transition training, or any other topic.

Arden Johnson, Winsted, MN, 320-485-3891.

Arden is also another highly experienced builder having completed both an RV-4 and RV-6A. He is located in the far western Twin Cities area.

Mike Hilger, Inver Grove Heights, MN, Home: 651-455-3160, Cell: 612-414-9128.

Mike is an EAA Tech Counselor with EAA Chapter 1164 at Fleming. He lives in Inver Grove Heights, making Rochester an easy drive or flight. Feel free to leave messages on his cell phone.

Richard Marr, River Fals, WI. Home: 715-425-0262, Cell: 612-751-6165

Richard is an EAA Tech Counselor with EAA Chapter 54 at Lake Elmo. He has been an A&P and IA for more than 30 years. He has inspected several aircraft types, preparing for their FAA Inspection. Richard also volunteers as an instructor for the "EAA Sheet Metal Workshop" and is a member of the FAA's "FAAST Safety Team".


Avionics Counselor: Russ Callendar, RC Avionics. 651-228-9760


Another excellent resource is:

Paul Irlbeck, Wabasha, MN.    Paul is a professional aircraft mechanic who specializes in the construction assistance of RV aircraft.   He can he reached at 651-565-3653.


Amatuer Built Designated Airworthiness Representative

Tim Mahoney, St. Cloud, MN, - home-320-259-9307 or cell-320-267-2934.



Tim is a highly experienced homebuilder having completed several aircraft including an RV-4.  As a ABDAR he is limited to amateur-built fixed wing, piston engine aircraft. This would include tube and fabric, composite and metal construction. His fee is $200 plus mileage.


Richard Marr, River Falls, WI, Home: 715-425-0262, Cell: 612-751-6165



Richard is a FAA DARF "Designated Airworthiness Representative, Manufacturing" for almost all FAA certification functions including Amateur Built and Light Sport Aircraft. Richard can assist in Certified Aircraft activities like STC and PMA approvals as well as all types of Experimental and Standard Airworthiness Certificates. Richard covers all certified aircraft types without limitations and all amateur built construction types except for rotor wing.

Richard is also a FAA DART "Designated Airworthiness Representative, Maintenance" for Transport Category Aircraft.