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Joined Oct 2004
736 Posts
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While I wait for the billet-alum motor mount that will house my 16/25/4... I put together a new 16/15/4 model....THE WRAITH! I am pushing it with the 4 cell lipo, I know this...but a chance is a chance; unless you do not take it, then it's a missed opportunity. A good friend (who is a cop) came out today after his shift with a KA band radar that plugged into my handy cigarette ligher on the truck and after 4 passes....106MPH in an ascent (not dive)!!! We were getting between 75-85 level. ...A few times peaking at 88+ if the wind was at my tail. I have defintely 'gotten the hang' of building these from the foam fuse (thanks for the tip, Scott, on where to get 'em!)...and I can turn out a sweet ship in about 2 nights. Had one boo boo today on a landing where I hit a piece of aluminum in the sand and it took out a vert fin, but I was able to come home, glass and paint another, and get one more flight in before the sun went down...and get my 106mph speeding ticket. More soon, --C |
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Last edited by ChuckD; Jan 09, 2005 at 07:30 PM.
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Mine Gott Man! What are you using for the battery pack?
MC shows 4S on a /4 with a 6 x 4 drawing 35 amps Even a 15C pack is going to die very quickly at that current, and it doesn't sound like you were using much in the way of throttle management .If anyone else tries 4S packs, be aware that unless you have a CC 35 or 45 the BEC will produce expensive magic smoke. The most often used CC 25 will only take up to 10 NiMH cells (12V) and not 4S (16V) packs, even with only two servos. FC |
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Joined Oct 2004
736 Posts
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-- CC 35 (Standard Timing) 4 cell cutoff set to 12V....and I have not had a 'cut out' yet...ON A TP 2100 2nd generation 15 C burst. (I am switching to a 20C rated 4 cell pack)
It actually only pulls 29amps at W.O.T. (Watt-meter) static and I am guessing that drops to about 25 or 26 in flight (25 is the motor's redline of pain). Motocalc's numbers were off for me, too before when calculating a mega setup on the Stryker. It said the same...but when I bench tested it; voila! Though I DO NOT advise this setup at all...we Stryker users have a unique advantage; the wind races through the open-ended motor giving it a higher threshold. Lipos come out warm...but I am VERY gentle with W.O.T....short 15 sec bursts at best. Will the motor smoke? Maybe...but at this time in the 'How Far Can You Take It' files...this is one mean setup. I will let you know if it does flame out on me...so far...6 flights with this setup |
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Well chuck, since this is a "how far can you take it" thread, I've had mine radar clocked at 98mph
straight and level into a 10mph head wind and 130mph in a steep descent but not quite a full on dive. My setup was a Mega 16/15/4, Polyquest 4s1p 2200, APCe 6x4 prop, CCPhx35.Mike |
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Joined Oct 2004
736 Posts
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Hey MT,
Good seeing you again!! We were having trouble getting a radar track on it (he said it was very narrow for that radar) and I had to bank so he could get a solid reading off my bottom...so perhaps I slowed down...it was an old KA radar that they do not really use anymore...and I am sure it had not been calibrated in a while as it had dust all over it. We tested it with a drive by in the car at 35 and it was dead on.... Seeing as I am using the same setup (minus that particular pack and timing set to standard); I will begin stating mine does the same immediately! I was out flying with 5 guys today at the beach; we were raving about your classic 3D video with the Stryker...you, Lex, and Ron are pretty much famous here in the mid atlantic. Rock on, C |
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Last edited by ChuckD; Jan 09, 2005 at 08:33 PM.
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Chuck, to be very honest, you might be faster than me. I'm not sure of your AUW but mine is only 20.5oz. If you glassed yours it is likely to be heavier and stiffer than mine, both of which aid in the speed dept esp. in a dive!
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Keep up the good work. I love your black "Stryker Wraith" version! Mike |
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Der Strykermeister
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Chuck, perhaps you should consider changing your handle from ChuckD to "Der Strykermeister", jah? Scott |
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Joined Oct 2004
736 Posts
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Scott!
Thanks man! It was awesome to get out to see your band of merry men and experience how the 'Beach Renegades' do it all up ...no by-laws, no meetings, just a bunch of razor sharp crazies pushing the E-Glide to the limits. Despite my encounter with a piece of sand-buried-aluminum, it was one of the best days I have had in quite some time. Hanging around guys like you will hopefully help some of the talents to rub off on me...take note everyone, the 'Beach Renegades' are for real and harder to find than the A-Team; or perhaps even the fabled, Sasquatch. Next time I get to see them fly, I will post some pics in the gallery...amazing stuff. My Stryker looks like a fly next to these machines! Fly on, C The STRYKER "Rock and Roll" is coming...this will be my most difficult build yet. |
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Last edited by ChuckD; Jan 11, 2005 at 01:13 PM.
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Joined Oct 2004
736 Posts
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Hey Everyone,
We are up in the 70's here at the beach...and the wind is pretty fast, too... I am doing some 'drawing board' work this week and was wondering if any of the Stryker-Heads have some good stories involving the Mega 16/15/3. I got my hands on one while my 16/25/4 sits in a wharehouse somewhere. Anyone have any good stories of Apps with the 16/15/3? The best I have found so far on the computer is 3 cells with a 6X3 APC prop.... --C |
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That motor is an amp hog. It will pull about 37 amps to give you about 31 oz of thrust at a tip speed of 70 mph with the 6 x 3. Compare that with a /5 on 4S that pulls 25.5 amps to give 30 oz thrust at a tip speed of 74 mph. On the /5 you get 50% more duration and only give up 150 ft/min of RoC on a 6.5 x 3.9. The trade off doesn't see worth it, until you factor in the cost difference of a 4S over a 3S. BTW, watch the RPM limit on the /3 if you decide to go nuts and use a 4S pack FC |
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