Skygate/CARF Viperjet
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DenisFerrari (12-29-2021)
09-22-2019, 07:04 PM
#579
09-22-2019, 07:05 PM
#580
09-22-2019, 09:04 PM
#581
For super accurate balance ( never needed on any model I have flown!) a 2mm piano wire length with hook on each end put through the wing bolt mounting hole and lift the fuselage. But like I say without a measured amount of fuel on board all these balances vary, so you can lift the fuse with a finger under the wing root lip and that is close enough. I still think on the Viper the balance could go back more and it would be happy.
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DenisFerrari (12-29-2021)
09-23-2019, 07:00 PM
#582
09-23-2019, 09:38 PM
#583
The M6 spiked nut hole just in front of the gear cutout.
Dave
its about 30mm back from the spar. Canopy glass on, tails and fin on with a landing amount of fuel in the main tank.
Dave
its about 30mm back from the spar. Canopy glass on, tails and fin on with a landing amount of fuel in the main tank.
Last edited by Dave Wilshere; 09-23-2019 at 09:42 PM.
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DenisFerrari (12-29-2021)
09-25-2019, 01:58 PM
#584
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DenisFerrari (12-27-2021)
10-28-2019, 07:32 AM
#591
Join Date: Sep 2006
Location: Copenhagen, DENMARK
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the stand is not laser cut. Pure handcraft..made in 15 mm plywood. The light is from unilight.at. it's the combo kit..with 2 x 15 mm landinglight.
11-17-2019, 07:31 AM
#592
Another ViperJet for my local club. Three successful test flights today with my balance point. JetCat P-160RXi-B for 8 minute flights. Savox servos and a PB Mercury.
12-10-2019, 12:40 AM
#593
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Oesterling and I are putting some Viperjets together. There are a few opinions about the correct CG. I have read your article in the new issue of RC Jet International and in this thread about the rather nose heavy recommendation in the manual.
Your recommendations and way to balance the Viper is very interesting since we can reduce the weight by almost a kilo.
We are both using electron retracts but since this is heavier than the pneumatic retracts how will this effect the final balance point?
Do you have any idea where the CG is with wings attached?
T.Abraham
12-10-2019, 12:59 AM
#594
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Hi,
I am not answering for Dave as he is more knowledgable than me on this but I subcribe to this thread as well.
I also have a Viper jet and have balanced mine the same as one of our great fliers here in UK .
The back edge of the wing tube seems to do the trick when fully assembled for many in my opinion but there may be other views if you want a more edgy feel.
David Butt
I am not answering for Dave as he is more knowledgable than me on this but I subcribe to this thread as well.
I also have a Viper jet and have balanced mine the same as one of our great fliers here in UK .
The back edge of the wing tube seems to do the trick when fully assembled for many in my opinion but there may be other views if you want a more edgy feel.
David Butt
Last edited by skywarrior; 12-10-2019 at 01:05 AM.
12-10-2019, 02:46 AM
#595
Hi Dave
Oesterling and I are putting some Viperjets together. There are a few opinions about the correct CG. I have read your article in the new issue of RC Jet International and in this thread about the rather nose heavy recommendation in the manual.
Your recommendations and way to balance the Viper is very interesting since we can reduce the weight by almost a kilo.
We are both using electron retracts but since this is heavier than the pneumatic retracts how will this effect the final balance point?
Do you have any idea where the CG is with wings attached?
T.Abraham
Oesterling and I are putting some Viperjets together. There are a few opinions about the correct CG. I have read your article in the new issue of RC Jet International and in this thread about the rather nose heavy recommendation in the manual.
Your recommendations and way to balance the Viper is very interesting since we can reduce the weight by almost a kilo.
We are both using electron retracts but since this is heavier than the pneumatic retracts how will this effect the final balance point?
Do you have any idea where the CG is with wings attached?
T.Abraham
Go my way and you will be happy.
Dave
12-10-2019, 10:53 AM
#597
It depends on flap travel. Take off 20 degrees and for landing I have as much as possible, so 80-85 degrees. With this you will need 0.5mm measured at elevator root down on take off and 2.5mm landing
Dave
Dave
01-20-2020, 05:38 AM
#598
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What about the other control surface settings on the Viper, do you use the ones from the manual..
elevator +35/-40 mm (taleoff/landing) - +20/-25 mm (fligt)
rudder 70 mm
Aileron +13/-20 mm
regards
Jan
elevator +35/-40 mm (taleoff/landing) - +20/-25 mm (fligt)
rudder 70 mm
Aileron +13/-20 mm
regards
Jan
01-20-2020, 10:40 AM
#599
Jan
i always set up to ‘eye’ , but I also set one elevator rate for all, you don’t need so much elevator with the correct balance point.
I would guess I went +/+ 25mm elevator and plus 13-14mm and minus 16-17mm. Rudder is maxed.
its expo that needs putting for taste and gyro/no gyro
i always set up to ‘eye’ , but I also set one elevator rate for all, you don’t need so much elevator with the correct balance point.
I would guess I went +/+ 25mm elevator and plus 13-14mm and minus 16-17mm. Rudder is maxed.
its expo that needs putting for taste and gyro/no gyro
01-30-2020, 06:18 PM
#600
My Feedback: (1)
question on up grading to electric gear
were you able to mount the nose gear and use a servo for direct steering eliminating the pull pull system? were you able to keep the nose gear door.
did you use the 40 or 50 size gear.
thanks for your input.
stan