Summary of Contents for ARPLAST PV-50
- Page 53 5. The blade bearings are supplied greased but apply new grease when servicing. Two UK builders have reported corrosion to the thrust bearings at the blade ends. Both aircraft were kept outside. Arplast changed to a new grease in 2000. The bearings are inexpensive standard type.
- Page 54 Explanation The system works using an electric motor supply voltage of -7.2 or +12 volts ( normally + ve on the central core of the propeller to increase blade pitch). The rechargeable batteries are delivered charged and their voltage may be checked by applying a voltmeter to the contacts on the battery pack ( 7.2 v). The control box should be sited carefully - AVOID the possibility of short circuit as the rechargeable batteries are capable of discharging high current which would be undesirable and could even lead to fire.
- Page 55 Method 1 (tractor installation) 1. Hold the blade in one hand and turn the blade until the alignment bush is closest to you. 2. Turn the blade alignment bush until the gap between it and the blade collar is the smallest. 3.
- Page 56 Check all modifications with your aircraft inspector. Remove three Rotax collar nuts and replace with Arplast Inserts. Offer the propeller up and insert long M8 bolts into the hub and screw into the collar nuts do not tighten completely at this stage. Insert three short nuts through the back of the propeller flange.
- Page 57 Limiting Pitch Variation The PV50 is equipped with two micro-switches which limit maximum and minimum pitch. Additionally the hub is fitted a tube and two O rings which mechanically limit pitch. This mechanical limit is not an operational limit. For additional safety set the mechanical stop 1° or 2° finer than the electrical fine limit. For use in the UK the PFA may require blade pitches to be limited so that : 1.
- Page 58 FUSES (Old control box prior to 2003) The control box contains two fuses, one 2A and one 3.15A (earlier controls used different values). Fuse ONE protects the control from the supply. Fuse two protects the supply from the re-chargeable batteries to reduce pitch.
- Page 59 This could help you set up your installation if the propeller is ever damaged. Name: Email address: Tel # Propeller Type: Arplast PV50 serial # ... Diameter … cm Narrow/Wide Blade Form Engine Type: Rotax ……………………..… Aircraft Type: ……………………………………………….
- Page 60 Limit Switch Settings (based on Rotax 912 and 912S) For initial settings we suggest the following: For propellers fitted with standard ARPLAST controller Fine pitch limit set to give 5200 rpm at full throttle with aircraft tethered. Course pitch limit set to give 5200 rpm at full throttle in level flight at full course setting.
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