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General Aerospace FAQ's
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| Please choose from the list below for the most frequently asked questions and answers for the most popular Enidine Incorporated Products. |
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What operational benefits do hydraulic actuator/rate controls have over gas charged units?
Hydraulic units are much better suited to the extreme temperature requirements of aviation applications because they maintain a more constant performance over a wide temperature range. For example, gas charged airstair deployment dampers can become too weak in cold temperatures, causing the airstair to slam down into the deployed position. Conversely, they will become overcharged in very hot conditions, causing the door to hover short of the fully deployed position. A hydraulic unit will perform smoothly in both temperature conditions.
Are your products classified as hazardous material?
No, Enidine products are not classified as hazardous under IATA shipping regulations, unlike gas charged actuators, which are considered high-pressure vessels. Using Enidine actuator/rate controls avoids the headaches and expense of hazmat handling, shipping, storage and disposal!
How do I decide which is the best technology to solve my vibration isolation problem?
One of Enidine’s core strengths lies in our engineers’ ability to choose from an unmatched array of technologies to solve your vibration isolation problems. Instead of steering you toward a single technology every time, like some other companies, Enidine can apply elastomerics, wire rope, wire mesh, or hydraulic technologies – or a combination of them – to best fit your application.My aircraft seat is not reclining properly. Are there any checks I can perform to identify the problem, before I remove the recline lock for warranty evaluation?
- Make sure the control cable end is firmly attached to the actuation end of the seat lock. A loose cable is often the culprit on a seat that will not recline. Next, make sure the cable end is adjusted on the lock end properly, so there is a minimal gap (.03 to .05 inch) between the cable end and lock valve stem. It is important that there be a gap, but not too large a gap. If there is no gap, the lock may be partially actuated and recline without pressing the cable button, but if the gap is too large, the lock may only partially actuated, or not at all.
- If the attachment and adjustment of the lock end of the cable seems in order, test the “throw” of the cable. While looking at the attached cable end, press the cable button to see how much stroke occurs. If the stroke is not sufficient to completely depress the lock valve stem, you may have too large a gap at the cable-lock interface, or there may be a problem somewhere else in the cable. Two known problems could be worn out cable conduit (usually at a bend), or a broken button assembly.
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- If you feel the seat is “spongy”, or reclines slightly without actuation, you can test to see if the lock is the cause. You must remove the seat cushion so that the lock is plainly visible, and disconnect the cable completely from the lock valve stem. While looking at the lock, push against the headrest from the front (attempting to recline the seat). If the lock does not compress more than a sixteenth of an inch, yet the seatback still feels spongy, the lock is not the cause. With closer inspection, you may see some play in the seat linkages, flexibility of the seat frame itself, or worn lock attachment hardware. These are common causes of seat sponginess, which are sometimes incorrectly blamed on the seat recline lock.
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