---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Fri 06/29/07: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:21 AM - Re: Woodcomp Prop (Thom Riddle) 2. 12:24 PM - Fuel drain valve (Bernhard10) ________________________________ Message 1 _____________________________________ Time: 04:21:55 AM PST US From: Thom Riddle Subject: Re: Allegro-List: Woodcomp Prop Hugh, We have the same prop on our Allegro but there is no leading edge tape. We operate mostly from paved runways but also fly into unimproved ones with some frequency. The leading edge of our prop continues to get nicks and chips. 1. Many prop leading edge protective tapes are made of polyurethane. 2. PowerFin Props (in USA) makes one of the best products for leading edge protection. 3. When the tape looks like it has taken all the abuse it can and is no longer protecting the prop. 4. Yes, it is important to repair these nicks. 5. I contacted Woodcomp about what to use for these repairs and was told to use either epoxy or polyester resins to fill the nicks. I have and continue to use epoxy because we have some on hand. Fill the nicks a little higher than the surrounding surface, let cure completely, then sand down to conform to profile and polish edge. The owner can do it. 6. Balance is critical for smooth operation. Do whatever you have to do to make sure the same amount of tape is still on each blade by trimming or replacing the tape. For what its worth, if our prop gets full of resin on the edges, we will consider replacing it with a different manufacturer's prop. Two of the most rugged and ones are Warp Drive (a good bit heavier than Woodcomp) and the GSC props with their extremely hard material imbedded in the leading edge of their wooden blades. I've never seen a Warp Drive prop with any leading edge damage. I've owned and flown a GSC prop (from BC Canada) on another airplane with pusher engine installation (Titan Tornado) where the prop picks up all kinds of stuff from the main wheels of the aircraft and the leading edge protection never showed any damage. The GSC wooden props are a good bit lighter than the Warp Drive. PowerFin also makes a very good very light prop but it needs periodic replacement of the leading edge protection. All the homebuilders I know who have all three of these props are very happy with them. http://www.powerfin.com/ http://www.warpdriveprops.com/ http://www.ultralightprops.com/tech_series_props/ gsc_tech_groundadjust.htm I hope this helps. Thom in Buffalo Time: 06:24:13 AM PST US From: "Hugh McKay III" Subject: Woodcomp Prop I have a Woodcomp Klassic 160/3/R on my Allegro 2000. I notice that the leading edge of the prop blades have some type protective tape covering them. I also notice in the manufacturers installation instructions a statement that when operating in aggressive conditions or on unimproved runways (i.e. grass strips) it is necessary to protect the leading edge with a special tape. I have two questions: 1. What is this special tape? 2. Where does one get it if needed? 3. How does one know when to replace it? 4. If a prop of this type is nicked on the leading edge, can it be repaired? 5. If it can be repaired, what is the method, and can the owner do it? 6. On my prop this tape is carried out to the blade tip and around the curved end. The centrifugal force of the prop rotation is causing the tape to begin to separate (creep) from the end of the prop blades. This seems to me to be inefficient and could cause out of balance vibrations. Any comments? ________________________________ Message 2 _____________________________________ Time: 12:24:48 PM PST US Subject: Allegro-List: Fuel drain valve From: "Bernhard10" I don't like the screw type fuel drain valve on my Allegro 2000 ( get fuel all over my hands every time I have to open it ) and I would like to exchange it for a quick push type fuel drain valve I am used to. Has anybody done that before, and if so, do you know the right diameter or make and model to fit right in ?? 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