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Demon pylon racer

Old 11-04-2008, 12:36 AM
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bubbafly
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Question Demon pylon racer

Hey all

I just bought a used demon (espritmodels) pylon racer. I have a desire to go fast and turn left and I thought this model at the price I got it for would be ideal. It's a little large for a pure pylon plane, but my intent is to power it with a speed 400 motor and work my way up the learning curve. What i want to know, and probably should have asked before I bought the plane, is, can this plane be a good well-mannered sport plane also. What I mean is, does it launch well, no tendencies for snap rolls or violent tip stall, easy to trim, etc. Not much out here on the internet about its flying characteristics and I thought maybe someone on this forum would know. It is pretty and well built, but that doesn't mean it will fly well. I haven't gotten it in my hands yet and I kind of wanted to know what to expect when it arrives.

Tim
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Old 11-04-2008, 06:12 AM
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WAR MACHINE
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Congrats on the Demon and good luck. I can't answer your questions but Im getting one as well. Im going to start with Medusa Research 028-056-2800V2 (+-750W) and then onto NEU 1509/1Y (+-1500W).
From what Ive read the Demon is very well behaved with no bad tendancies.
What batteries and ESC you going to use ?
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Old 11-04-2008, 01:26 PM
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The first motor will be a Graupner Speed 400 +. It has the esc already built onto the motor. It will be in the plane as long as it takes to get used to the flight characteristics of the plane and to learn the pylon style of flying. probably start with a 7 cell 1200 pack of NiMh's cause that's what I have laying around. Later, I will look into more power(brushless) with lipo packs.

Tim
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Old 11-04-2008, 01:47 PM
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Where did you find a used Demon ?

Brandon
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Old 11-04-2008, 03:07 PM
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From a gentleman on RC Groups forum. 95.00 shipped with 2 hs-81g servos installed.

Tim
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Old 11-04-2008, 07:20 PM
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Hey now,
While your new Demon may well stay in the air with a S400 motor, it won't be 'happy'. It'll kinda wallow around in the air and mush through the turns, especially using a seven cell nimh pack.

You'd be much happier if yopu were to start off with a mild 28mm brushless inrunner. A Mega 1615-4, ARC 28-37-3, or other 2300kv to 2800kv motor on 3S LiPos and a 5.2-5.2 prop.
Yes, that'll give more power than you actually want at full throttle, but at half throttle it'll be fine.

Planes like these don't really get on step untill they hit about ninty mph or better, yes, they can fly a lot slower than that but to really groove like it's on rails you'll want more speed than a can s400 will give you.
Good luck with it however you go, it's a very nice plane within it's limits.
A great starter speedster...
RobII
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Old 11-04-2008, 11:10 PM
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Rob

Thanks for the tips. I guess i'll save my money up for a mega motor and jeti esc with lipos for power and use the S400 in something else. Maybe I can get a fair deal on the for sale section here on this site.

Anyone got a mega 16/15/4
Jeti 18 esc
for sale at a resonable price.

Tim
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Old 11-04-2008, 11:29 PM
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Originally Posted by bubbafly View Post
Rob

Thanks for the tips. I guess i'll save my money up for
a mega 16/15/4
Jeti 18 esc
for sale at a resonable price.
Tim
Hey now,
Um, I'd think that Jeti 18 would be a tad small.
Also for about the price of decent used you could get an ARC 28-37-3 motor from Lite flite r/c and a Thunderbird 36 ESC from Castle.
I've played with both motors on the dybo and the ARC motors are very impressive, and at only fifty bucks for the 37mm cans quite reasonable. Half the cost of a Mega motor, higher effiency, and a good solid build.
Also Castle, even their sport T-bird line is very good, cheaper than the Jeti and has better factory support. Something to think about.

Not that the Mega/Jeti combo is bad, the other is just a bit better IMNSHO
RobII
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Old 11-05-2008, 05:54 AM
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Also take a look at Medusa Research 028-056-2800V2 - can take upto about 70A - on a 4S should be good for around 800W.
NEU 11xx or 15xx pricey but very good.
What pack you thinking of using ?
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Old 11-05-2008, 01:50 PM
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Brandon

As of now , I am looking at the thunder power pro lite 3s 2100 pack.

Tim
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Old 11-06-2008, 06:34 AM
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Good choice - you can then add a 2S 2100mah to make 5S
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Old 11-29-2008, 12:33 AM
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Originally Posted by bubbafly View Post
Hey all

I just bought a used demon (espritmodels) pylon racer. I have a desire to go fast and turn left and I thought this model at the price I got it for would be ideal. Tim
This one isn't a demon, but became one when I modified it! Originally a Speedy 400, built for a brushed speed 400 can motor, single servo arrangement for barn door ailerons, 8 cell 1000 mAh NiMH pack, 6x3 folding prop. It flew nice. I decided to "upgrade", installing separate aileron servos, Mega 16/15/3 brushless inrunner, 5.5x4.3 CAM Speed prop, 25A CC ESC, TP 3S 2100 LiPo pack, strengthened wing hold down bolts, modified servo mount for elevator, modified wing hold down block, installed cooling and extraction scoops.

On a two cell 2100 Lipo, flew nice, occassional bursts at WOT would result in very nice sustained verticals, and hard left turns in 1-1/2 heart beats.

On a three cell 2100 Lipo, flys very fast on 22% throttle, haven't had the courage to try a WOT burst yet. Hard left turns now in 3/4 - 1 heart beat. A once very nice flying plyon trainer is now a MRSOB, so keep your nitro pills handy!
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