In the beginning...No really shortly after the release of Quests Micro Maxx Product line in late 1999 with MMX-1 motors #5662, NAR designationed 1/8A.2-1. It was obvious at least clustering was going to be something that needed to be looked at. Since 2x1/4A cluster Altitude was the last cl-alt event in the pink book I thought 3x1/8A Cluster Altitude sounded logical and went about designing and flying one. Works very nice.. but alas the powered that be decided to leave it a 2x1/8A a couple years later So we built several versions from quilifier to super Streamlined.
About the same time I decided it would be fun & possibly funny to produce a "Full A" micro powered model. At the time we really didn't have all the data on the motor nailed down and I was under the impression the motors were 1/8A's SO.... an 8 motor cluster was designed, built and tested...Wow! now that's micro power!!! LOL. Unfortunately this was before I bought a digital camera and neglected to photographic the model in it's raw unpainted development stage.....and as luck always has it while testing things this model ended up lost...stuck in the top of a very tall Oak in the woods next to the launch site. I've ment to build another but it's just never gotten to the top of the To Do pile. Since I know how well it works I guess it's just not a priority. I do have the one page plan Uploaded over in the MicroMaxRockets group files if your really interested in seeing how it looked.
When looking at Micro Clusters their are a couple very important considerations that aren't immediately apparent but can cause trouble for Competition flyers. Number ONE on the list is if your flying a minumum diameter model with Tracking powder the powder MUST be contained in some way to keep it from acting much like sand in an earthquake creating an ejection proof barrier for your recovery system. This has cost me highly with a couple of flights that tracked to 85m by were DQ'ed for NO recovery deployment. Second: making the model as Slick as possible is paramont with the smallest possible frontal area.
Sport models can be a load of fun with even the smallest 2 motor combinations. Over the time we've had with Micros...Wow over a decade now...2,3 & 4 motor combinations seem to be almost common place.