1. VMA-ETS120 Model Engine Test Stand
1.1. Firewalls Not Tight on VMA-ETS120 Model Engine Test Stand

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!

 

1.2. VMA-ETS120 Model Engine Test Stand - Rust on Metal Parts
Question: I have bought a VMAR Engine Test Stand #VMA-ETS120. Some of the metal hardware appears to be rusty. Is this a problem? What should I do?
 
Answer: This item is sourced from a factory in Southeast Asia. The temperature and humidity in the tropics are both high and the combination of high temperature and high humidity creates surface rust on all ferrous materials even when they are treated with normal plating.
 
The rust is surface based only and does not affect the utility or longevity of the product. Remember that an engine test stand will normally be literally dripping with oil within a few minutes of first use.
 
If you wish to remove the rust, one simple trick is to put the metal parts in a sock or bag and wash them with dishwasher soap in a dishwasher. Do NOT use the dry cycle... wash only. Then remove the metal parts and dry them by hand using a paper towel. Any rust remaining on rods or flat metal plates can then be removed using a bit of sandpaper. Finally, use a few drops of WD40 or 3-in-1 Oil to lubricate the bolt threads and you will be good to go.