and the Losi 22 is formed slightly at the edges plus the side pods tie into the front bulkhead. 7075-T6 is stronger than the 6082-T6 i originally suggested (approx. 310 Mpa proof stress) but either material makes the 5251-H22 seem a little on the weak side.
i still maintain that irrespective of what the material is, some form of bracing is required - be it formed edges on the chassis or some upper bracing - it just doesn't look right at the moment IMO and you know how the old saying goes.....
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