▁the ▁frame ▁fus el age ▁constructed ▁around ▁a ▁single ▁longitud inal ▁ 6 0 6 1 - T 6 ▁al umin um ▁t ube ▁that ▁supports ▁the ▁tail , ▁landing ▁g ear ▁and ▁seats . ▁The ▁wings ▁and ▁engine ▁mount ▁are ▁similarly ▁of ▁ 6 0 6 1 - T 6 ▁al umin um ▁t ube ▁and ▁attached ▁to ▁the ▁main ▁t ube ▁by ▁connecting ▁str uts . ▁The ▁wing ▁features ▁al umin um ▁t ube ▁sp ars ▁and ▁rib s . ▁All ▁Be a vers ▁prior ▁to ▁the ▁R X ▁ 5 5 0 ▁Plus ▁and ▁the ▁SS ▁had ▁pre - se wn ▁D ac ron ▁en velop es , ▁which ▁enabled ▁build ers ▁to ▁complete ▁the ▁k its ▁in ▁as ▁little ▁as ▁ 1 0 0 ▁hours . ▁The ▁later ▁models ▁use ▁conventional ▁fabric ▁methods ▁and ▁this ▁makes ▁the ▁factory - c laimed ▁build ▁times ▁ 1 5 0 – 2 0 0 ▁hours ▁for ▁the ▁SS ▁and ▁ 1 8 0 – 2 0 0 ▁hours ▁to ▁the ▁R X ▁ 5 5 0 ▁Plus . ▁ ▁All ▁Be aver ▁wings ▁are ▁swe pt - back ▁and ▁have ▁elli pt ical ▁tips . ▁The ▁Plus ▁wing ▁diff ers ▁from ▁the ▁earlier ▁Be aver ▁wings ▁in ▁that ▁it ▁rep laces ▁the ▁internal ▁drag ▁w ires ▁with ▁tub es ▁and ▁uses ▁many ▁more ▁rib s ▁to ▁maintain ▁a ▁better ▁air fo il ▁shape , ▁at ▁the ▁cost ▁of ▁additional ▁weight ▁and ▁complexity . ▁The ▁SS ▁and ▁R X ▁ 5 5 0