RCU Forums - View Single Post - Typhoon 2000 (TEMPEST) modifications thread
Old 03-14-2005 | 02:10 PM
  #283  
MTK
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From: Whippany, NJ
Default RE: Typhoon 2000 (TEMPEST) modifications thread

Mark the 2+2 wasn't built by me. I bought it from a well known pilot who did an average job with it. I was out of time and needed something fast so I got what I bargained for. Never again will I buy on someone's reputation.

Having said that, I would say the model is overdesigned and can turn out heavy if you aren't careful with wood selection. This model was barely in spec. There are many areas where weight could be saved. There areseveral places for example where the say to use wood planking. Don't do it. Wet a balsasheet and tape it down over the structure, let it dry to mold itself, then glue it down.

The fuse is shown to have several formers aft of the wing. That many are not necessary if you glass the fuse. The whole fuse shell is shown to be 1/8" balsa. I would only use 1/8" on the sides medium grade, and either 3/32" or 1/16 everywhere else, contest grade.

Wing is huge at a full 2 meter span and over 1100 sqin. I would reduce both the span and the area down to at most 1000. The stab is much too large to begin with at about 30% of the wing. I would reduce that down to around 25%. These two changes alone will make a very spirited performer. If you really want good rudder response and authority, it would be an improvement to add fuse depth around the cg. The extra side area will make rudder more effective. If you go with fixed landing gear that will add some side area.

good luck

MattK
ORIGINAL: MarkGrabowski

Matt, would you mind sharing some of your thoughts on building the 2+2 and any changes you'd recommend and/or pitfalls to look out for?