Clausxpf/Air Sally J-35 Draken,Alpha/Beta build w/New foam shell & glass method - Page 26 - RC Groups
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Mar 03, 2009, 10:43 PM
Suspended Account
lavochkin's Avatar
Originally Posted by corsair nut
2.4 ghz...and dont fly with hosers! leson learned...
LOL!!!! That was funny!
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Mar 04, 2009, 01:10 AM
deltas are cool
AIR SALLY's Avatar
Originally Posted by corsair nut
2.4 ghz...and dont fly with hosers! leson learned...
once again i say wisdom .....that LeSSon learned eh!
Mar 04, 2009, 07:19 PM
deltas are cool
AIR SALLY's Avatar
ok i finally glued the wings on today ...a little more shapeing and then the glass work can start.
Mar 05, 2009, 08:07 PM
deltas are cool
AIR SALLY's Avatar
the wing bond turned out nice ...just a tad of fairing to do time for glass.
Mar 12, 2009, 09:43 PM
deltas are cool
AIR SALLY's Avatar
Claus need some help ...C/N and i had a good look at the Draken today ...we talked about control throws ect . he thinks the c/g should be in front of the wing break @1/2 inch.......i say C/G is on the break....??? what do you say? or any other Draken drivers out there ??
Mar 12, 2009, 09:57 PM
hole digger
hole digger's Avatar
Roger come on give us some pictures!
Mar 12, 2009, 10:03 PM
Renegade Fun Forever!!
rvincent's Avatar
I think 1/4" to 1/2" in front is about right. If not you can always move it back, If it's not at the bond and you attempt it you could be picking up depron chunks!
Mar 13, 2009, 12:36 AM
deltas are cool
AIR SALLY's Avatar depron chunks
Mar 13, 2009, 01:07 AM
corsair nut's Avatar
looking at the wing area....the wing break just looks too far fwd to me. and ive been known to guess a few CG's in my days! the guys that say at the break are guys that are flying flat foame drakens. its just isnt exactly the same with a airfoiled bird. especially a fast one. im going to say that its probably safer going to about 1" fwd of the break.
Mar 13, 2009, 05:17 AM
Registered User
For some CG info, there is this from my old Midifan J35 Draken thread:
Claus chuck glider tests and this drawing suggest it should be a tad forward of that:
IMO I actually felt more comfortable/relaxed to fly it at neutral or even a bit tail heavy (as long as the speed is kept up/alfa kept reasonable when landing... there it can/will bite) so I don't think you need to worry putting it at the wing break, though perhaps do some simulated approaches at alt. before taking it down to be sure, extra precaution.

will there be maiden soon? Exciting, video is a must.
Mar 13, 2009, 05:59 AM
Registered User
Originally Posted by clausxpf
to me it looks like you got in a too tight turn and with the intake placed as you hav done , the fan was killed by no air comming in. one of my slingjets did almost the same ...not flown by me ... jets have to have speed in the air to stay alive.
but any how .. nice to hear from you..
now we only need airsally to send more pictures....
Refering to this:

This is an exciting airplane to fly in many ways and here is something I think must be considered carefully during maiden especially being used to other delta configurations.

Actually there was no turn intended here, I tried to keep it down and straight for a retake and it just flipped over, similar to the following landing style just with the difference that at that time it just hit full throttle: (check first landing, second landing style recommended instead)
The MBS one can do the same:
Fifth flight high res
I did read about this in a few books given out on the Draken.
It is expected and to be aware of.
The wing configuration give this behavior when outer wing panels are stalled as CG suddenly shifts about half the fuselage length forward,
demands speed is kept up at landing.
Apparently a major part of the training to fly this type was also handling of this behavior as show on some clips on i.e. YouTube showing cobra maneuvers as part of standard training.

Not intending to scare you here, just something I think is very important to be well aware of.
Mar 13, 2009, 06:08 AM
Claus at Area 52
clausxpf's Avatar
it will be more easy to handle for the first time with c/g 1" forward of the break just like CN says. as long as you have enough elevator availeble if needed at slow speed

Mar 14, 2009, 08:23 AM
EB-66C Team Member
J Morgan's Avatar
Pics! More Pics!!!!!

Mar 14, 2009, 05:29 PM
deltas are cool
AIR SALLY's Avatar
Guys thanks for the vid and info ...1" fwd of the break it is ..and keep speed up on the landing.
Mar 15, 2009, 02:54 AM
deltas are cool
AIR SALLY's Avatar
Got the bottom glassed tonite ...i'll try and get some pics tomarrow..and maybe get C/N to help with pulling another canopy.

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