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Dynam SR-22, competitor for E-Flite Cirrus?
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The biggest problem with that much flex is that you can't rely on the flight characteristics. I had an old GWS Estar that flexed like that and the wings collapsed in the middle of a loop. Now that one was my own fault because I hadn't installed the struts that day but this SR-22 doesn't have struts to install. Maybe I'll rig some up, wouldn't look quite "right" but would look better than a pile of crushed foam.
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Dynam is all about giving you the most value for your money, so dollar for dollar it is hard to beat. The eFlite likely has a few more scale features and it definitely will have a better product manual since Dynam manuals are very basic and not geared towards beginners. I still like the Flyzone Corvalis for a low wing civil sport, but I think those have been discontinued for a while now.
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I would buy the Dynam over the e-flite for a plane jane like that....I've had great fun with Dynam's planes - spitfire - twin beech - cessna - they were all fine. Cheap! but fine.... The quality from e-flite is there - you just have to pull the trigger and buy it..... Dynam's retracts go right in the garbage!
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One of the guys in our club said he's had much better luck with the Dynam retracts after figuring out they need some lubrication and servo trimming. What he commented was that he found the mechanism would stick from the lack of lubrication, and the servos would keep trying to retract or extend them more once they'd reached their stops. He said after doing those things, he's had good luck with them.
Obviously, YMMV. I'm just passing along what I heard, since, so far, I have no aircraft, Dynam or otherwise, with retracts.
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Originally posted by Hoomi View PostOne of the guys in our club said he's had much better luck with the Dynam retracts after figuring out they need some lubrication and servo trimming. What he commented was that he found the mechanism would stick from the lack of lubrication, and the servos would keep trying to retract or extend them more once they'd reached their stops. He said after doing those things, he's had good luck with them.
Obviously, YMMV. I'm just passing along what I heard, since, so far, I have no aircraft, Dynam or otherwise, with retracts.
Never tried the lube...Will put some grease on the twin and see if it makes it better!
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Originally posted by Hoomi View PostOne of the guys in our club said he's had much better luck with the Dynam retracts after figuring out they need some lubrication and servo trimming. What he commented was that he found the mechanism would stick from the lack of lubrication, and the servos would keep trying to retract or extend them more once they'd reached their stops. He said after doing those things, he's had good luck with them.
Obviously, YMMV. I'm just passing along what I heard, since, so far, I have no aircraft, Dynam or otherwise, with retracts.
The etracts do not operate in the same manner as a servo so adjusting the trim does nothing.
The lubrication aspect of your club members observations is the only valid point.Warbird Charlie
HSD Skyraider FlightLine OV-10 FMS 1400: P-40B, P-51, F4U, F6F, T-28, P-40E, Pitts, 1700 F4U & F7F, FOX glider Freewing A-6, T-33, P-51 Dynam ME-262, Waco TF Giant P-47; ESM F7F-3 LX PBJ-1 EFL CZ T-28, C-150, 1500 P-51 & FW-190
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He said the first time he noticed it, he was out at the flying field, and the only "lube" he had on hand was some liquid soap in his travel trailer (which he uses to haul all his planes to the field). A little soap on the mechanisms, and he had no more problems with them. After that, he said he put a little WD-40 on them.
Perhaps someone here with more experience with retract mechanisms will have a good recommend on the best lube.
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Originally posted by OV10 View Post
Just FYI........The above bolded comment has no relevance with regard to etract operation.
The etracts do not operate in the same manner as a servo so adjusting the trim does nothing.
The lubrication aspect of your club members observations is the only valid point.
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I'll have to try the lubrication option. One thing we have noticed with retracts in the past is that sometimes the strut goes in too far which causes the internal works to not be able to register the end of their movement. This can cause the retract to not know what position it is in which will, in turn, prevent the gear from opening. Found that out with my Flightline P-38; totally my fault when I upgraded the landing gear. Lucky me I figured it out on the bench.
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Originally posted by Tate View PostI'll have to try the lubrication option. One thing we have noticed with retracts in the past is that sometimes the strut goes in too far which causes the internal works to not be able to register the end of their movement. This can cause the retract to not know what position it is in which will, in turn, prevent the gear from opening. Found that out with my Flightline P-38; totally my fault when I upgraded the landing gear. Lucky me I figured it out on the bench.
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Originally posted by PilotAndy1994 View Post
The overall construction was cheap and loose on my Spits retracts. It was almost like it was binding up sometimes....eFlite retracts were great, although I had one pair where I had to lightly flex the gold pins in the servo connector to make contact. Had to belly land that beautiful mustang on her first flight :Scared:
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Originally posted by Tate View Post
Ooh, that hurts. That big scoop on the bottom loves to catch on everything. Hope she survived alright.
On the subject of e-Flite planes - they are of surprisingly good quality. The prices have increased over time - like anything else - and I have to really want one now to buy one. I remember I snagged a p-47 through HH for 179.99 - it was olive drab and had retracts, flaps, the works....They later discontinued that model and released a slightly larger model that cost 269.99. I spring for the Corsair - and it was a beaut - strong and durable.
The only flaws I have had with all e-Flite planes is the gear or hardware. Sometimes the hardware strips very easy against a screwdriver . The Corsair lost a little pin in the retracts that allows it to properly swivel - and the stearman I have was about to lose the entire gear where it came unglued in the foam!
You have to do periodic checks on those planes from e-Flite - i imagine this cirrus would need a few checks in the nose gear - as the Carbon Z I got from HH suffered from a wobbly nose gear after a few landings!
Andy
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