ArticlesArticles Most Popular ArticlesMost Popular Articles Most Helpful ArticlesMost Helpful Articles Submit A QuestionSubmit A Question Login for PRIORITY RESPONSELogin for PRIORITY RESPONSE
RSS Feeds
DrillDown Icon Table of Contents
DrillDown Icon LIABILITY & COPYRIGHT
DrillDown Icon Site Information
DrillDown Icon * Support
DrillDown Icon Technical Info - Adhesives
DrillDown Icon Technical Info - Master Airscrew
DrillDown Icon Technical Info - POLYPRO
DrillDown Icon Technical Info - RC Flying - General
DrillDown Icon Technical Info - RC Flying Electric - General
DrillDown Icon Technical Info - ULTRA POWER Technology - Products
DrillDown Icon Technical Info - VMAR - General
DrillDown Icon Technical Info - VMAR - Products
DrillDown Icon VMA-A0026 Avenger 60 ARF
DrillDown Icon VMA-A460X A4 Skyhawk Jet (Prop) 45-52 ARF
DrillDown Icon VMA-A140X Apache III
DrillDown Icon VMA-A340X Arrow Tiger
DrillDown Icon VMA-BS110 Balsa Stripper
DrillDown Icon VMA-B140X Beaver 45-60 ARF
DrillDown Icon VMA-B160C Beaver 60-90 ARF
DrillDown Icon VMA-B191C Beaver 120 ARF
DrillDown Icon VMA-B210X Bird Dog 06-12 ARF
DrillDown Icon VMA-C019 Cap 231EX 90-120 ARF
DrillDown Icon VMA-C0024X Chipmunk 40 ARF
DrillDown Icon VMA-C044 Cap 231EX 40 ARF
DrillDown Icon VMA-C210X J3 & L4 09-15 ARF
DrillDown Icon VMA-C260U F4U Corsair 60 ARF
DrillDown Icon VMA-C360X Cessna 182 45-60 ARF
DrillDown Icon VMA-D014 Discovery 40 ARF
DrillDown Icon VMA-D160F Dewoitine D520 45-60 ARF
DrillDown Icon VMA-D210X DO27 1100 EP Electric ARF
DrillDown Icon VMA-D260X Dornier DO27 45-61 ARF ECS
DrillDown Icon VMA-D290Z Dornier DO27 120+ ARF
DrillDown Icon VMA-D310X DO335 1240/300 Twin EP ARF ECS Electric
DrillDown Icon VMA-E0014 Extra 300L
DrillDown Icon VMA-ETS120 Engine Test Stand
DrillDown Icon VMA-E160X Edge 540T
DrillDown Icon VMA-E24XX Easy 3D ARF ECS
DrillDown Icon VMA-E260X Extra 330L
DrillDown Icon VMA-E340X Escape 40-52 ARF
DrillDown Icon VMA-F210X Fournier RF4D 2000 ARF ECS Electric
DrillDown Icon VMA-F35X08 Floats
DrillDown Icon VMA-F40X12 Floats
DrillDown Icon VMA-F490X Phantom II 60-90 Jet (Prop) ARF
DrillDown Icon VMA-F590X F5E Tiger II 60-91 Jet (Prop) ARF
DrillDown Icon VMA-F690X F18 Hornet 60-91 JET (PROP) ARF
DrillDown Icon VMA-H240X Hornet 40-52 ARF
DrillDown Icon VMA-J210X JU52 Trimotor 64in ARF ECS
DrillDown Icon VMA-M024 T34C Mentor 40 ARF
DrillDown Icon VMA-M340U P51D Mustang 40 ARF
DrillDown Icon VMA-M490R Mig 21 60-91 Jet (Prop) ARF
DrillDown Icon VMA-M490R Extra Wood Servo Tray Parts?
DrillDown Icon VMA-M490R Landing Gear Mounting Screws
DrillDown Icon VMA-M490R Lock Nuts for Wing
DrillDown Icon VMA-M490R Engine Mounts
DrillDown Icon VMA-M490R Rudder Control Rod Connection
DrillDown Icon VMA-M490R Wing Root Gaskets
DrillDown Icon Assembly & Operations Manual
DrillDown Icon VMA-M195U P51D Mustang 90-120+ ARF
DrillDown Icon VMA-N210X Nouvo 1300 EP 51 in. Electric ARF
DrillDown Icon VMA-OLEOxxx Oleo Strut Sets
DrillDown Icon VMA-P190X 90+ Texan II, Harvard II & PC9
DrillDown Icon VMA-P210X PC9 & Texan II 06-12 ARF
DrillDown Icon VMA-P240X Texan II, Harvard II & PC9 45-60 ARF
DrillDown Icon VMA-R014 Ramrod
DrillDown Icon VMA-R160F JODEL DR400 45-61 ARF
DrillDown Icon VMA-R240X RV4 45-60 ARF
DrillDown Icon VMA-S140X Aero Subaru 40-52 ARF
DrillDown Icon VMA-S190X SU27 Flanker 60-91 Jet (Prop) ARF 3DS
DrillDown Icon VMA-S195B Spitfire 90-120+ ARF
DrillDown Icon VMA-S210X Aero Subaru 06-15 ARF
DrillDown Icon VMA-S220X FI156 Storch 76 in. ARF ECS Electric
DrillDown Icon VMA-S240X Stinger 40-52ARF
DrillDown Icon VMA-T210X Twin Otter 09-15 ARF ECS Electric
DrillDown Icon VMA-U160X V-Stik 60 ARF
DrillDown Icon VMA-X140X Xtreme Stik 40-52 ARF
DrillDown Icon VMA-X240X Xtreme Stik 40-52 ARF
DrillDown Icon Technical Info - VMAX Electric Power Systems - General
DrillDown Icon Technical Info - VMAX Electric Power Systems - Products
DrillDown Icon Technical Info - VMAX Engines (Glow) - General
DrillDown Icon Technical Info - VMAX Engines (Glow) - Products
  Email This ArticlePrint PreviewPrint Current Article/Category and All Sub-Articles/Categories
 
VMA-M490R Mig 21 60-91 Jet (Prop) ARF - Lock Nuts for Wing - Superceded by new Wing Nuts

Question: On page two of the Assembly and Operators Manual that came with my Mig21 (version 20050329 per back cover) there is mention of four lock nuts in addition to four butterfly nuts. I cannot find these four lock nuts. What should I do?

Answer: The lock nuts were difficult to install and remove when used in conjunction with butterfly nuts. We are now using a better grade of butterfly nuts that do not require the use of additional lock nuts. Lock nuts are no longer included with the Mig21. If you do not wish to remove the wings for transport and want a longer term solution to ensure the butterfly nuts remain snug, use medium thread locker such as Z42 from Pacer.

In any event, check the butterfly nuts before each flying outing to ensure they are snug (do not overtighten or you will strip the studs) and retain the wing securely attached to the fuselage.

 

 

Article ID: 4101