Comp ARF "Spark" - Page 3 - RC Groups
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Sep 13, 2007, 02:28 AM
Tear down the WALL!
ralf dvorak's Avatar
.
Barry, I love you, too.

cheers,
RD
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Sep 13, 2007, 04:26 AM
smug in granny panties
monkamarm2000's Avatar
lol, im serious!

Barry
Sep 13, 2007, 05:57 AM
Registered User
Kevin Murray's Avatar
Quote:
Originally Posted by monkamarm2000
Was just thinking the best option for spark might be just buy the EB! lol
It certainly looks MUCH better than the Spark.
Sep 20, 2007, 11:12 AM
Xtreme Nut
I just saw the Spark and I am in love! I am not familiar with the DS-75, what is the size of the unit? 75mm? Anyone here got the plane yet? Man ... I really am awe struck.
Sep 20, 2007, 11:24 AM
Registered User
Kevin Murray's Avatar
75 is the FSA, I think it's a 120 mm fan.
Sep 20, 2007, 11:37 AM
Xtreme Nut
Kevin - I can't find any info on the fan, not even at the Schuebeler website. The 51 is a 90mm and the 94 is a 120mm. Really what is the DS-75? Hmmmm ...
Sep 20, 2007, 11:39 AM
2017 EDF Jet Jam, June 15-18
Robert Belluomini's Avatar
It is a 110 mm fan.

http://www.composite-arf.com.hk/ar/Product?741000

Click on related products links


Quote:
Originally Posted by tIANcI
Kevin - I can't find any info on the fan, not even at the Schuebeler website. The 51 is a 90mm and the 94 is a 120mm. Really what is the 75?
Sep 20, 2007, 11:43 AM
Suspended Account
Hi

The DS75 is a 110mm unit. Produces 11lbs thrust at 3000watts. It draws 96amps in the model when static,

Spark is very ok but the wing loading is a bit high.

10s 5000 pack spin 99 controller
Sep 20, 2007, 11:51 AM
Xtreme Nut
Robert - I went there earlier on and I could not see the fan size. I emailed CompARF and hope to know if the plane can handle a 120mm fan.
Sep 20, 2007, 11:52 AM
2017 EDF Jet Jam, June 15-18
Robert Belluomini's Avatar
Steve, What exactly does "very ok" mean?

Did you measure the efflux diameter at these specs?

Does the "bit high" wing loading really effect its landing performance.
I recall you posting that it landed nicely at Aspach.
Thanks,
BVB
(Binocular Vision Bob)

Quote:
Originally Posted by Whistling Watts
Hi

The DS75 is a 110mm unit. Produces 11lbs thrust at 3000watts. It draws 96amps in the model when static,

Spark is very ok but the wing loading is a bit high.

10s 5000 pack spin 99 controller
Sep 20, 2007, 11:54 AM
Xtreme Nut
Quote:
Originally Posted by Whistling Watts
Hi

The DS75 is a 110mm unit. Produces 11lbs thrust at 3000watts. It draws 96amps in the model when static,

Spark is very ok but the wing loading is a bit high.

10s 5000 pack spin 99 controller
Whistler ... thanks. Man ... 3K Watts ... I am sure its a good plane to fly. Comp ARF planes have always been good stuff. I am now into big EP planes so the battery packs are no issue for me, just have share the packs around.

High wing loading will be interesting. For me I am not worried about lift offs and flying any plane. My main concern is always, how does she land. Still this looks like a much better buy (cheaper that is) than a BVM Electra.
Sep 20, 2007, 11:55 AM
2017 EDF Jet Jam, June 15-18
Robert Belluomini's Avatar
It may but most here seem to think it should be flying on the 90mm fan.

Jet Power starts this weekend and I think there be more info released on the model then. I would imagine Steve will be there to cover all the EDF activity!

Quote:
Originally Posted by tIANcI
Robert - I went there earlier on and I could not see the fan size. I emailed CompARF and hope to know if the plane can handle a 120mm fan.
Sep 20, 2007, 12:01 PM
Xtreme Nut
The Spark on 90mm fan? Most 90mm fans are not giving you 11 lbs thrust but around 5 lbs only, unless you want to really wind the unit up really high.
Sep 20, 2007, 12:06 PM
2017 EDF Jet Jam, June 15-18
Robert Belluomini's Avatar
My thoughts exactly. I run the DS-51 on 8S at 55 amps and it produces
6.25 lbs very reliably at 1700 watts of input power. It can be pushed towards
8lbs but that is still not the watts/lb I would want to fly at.
Sep 20, 2007, 12:22 PM
Xtreme Nut
Robert - just read the Stumax fan thread, yeah, DS-75 prob means the FSA. The Stumax is really a piece of art. So what do you fly on 8S with only 6.25 lbs thrust? A nice big U2? Hehehehee ... just teasing. Most 90mm fans are on 5S only and even then the AUW is a fair amount compared with the thrust that is achieved.

I think I am done for ... Spark ... Stumax ... Spark ... Stumax ...


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