We have received a some feedback re the firewalls on the VMAR Model Engine Test Stand being loose. This is a hazardous situation and users are cautioned to ensure that the Firewalls are not loose and do not become loose during operation.

Resolution:

In Brief: Review the safety instructions in the instruction book. Wear eye protection and stay well clear of the propellor and ahead of the propeller. See Page 10 Section 3.2.2 of the instruction book and note the importance of keeping the firewalls fitting SNUGLY between the steel beams. Tighten the bolts, apply the extra locking nuts to each bolt and check bolt and firewall tightness frequently. Reduce vibration.

In Detail: Firstly review the safety instructions. Wear eye protection and stay well clear of the propellor and ahead of the propeller.  The cinch bolts should be firmly tightened during assembly and the extra locking nuts should be applied to help keep the bolts from backing off under vibration. Everything possible should be done to reduce vibration when running an engine in the test stand... balance the propellor and the spinner... tighten the engine hold down clamps and engine mount bolts and firmly screw or clamp the entire Model Engine Test Stand to a heavy bench or other suitable surface before operating. Check and watch for any loosening of the cinch bolts, locking nuts, engine clamps, firewalls or other fasteners. Stop the engine if anything appears to be loosening up or appears visually blurry when you are looking at it. Do NOT operate the engine test stand unattended!