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Tagged: Satellite 1300 BMJR Build
- This topic has 69 replies, 21 voices, and was last updated 5 years, 2 months ago by Mike Schwartz.
11/25/2017 at 8:43 pm #80689
I’ve got one going also, only 1/8th at the dihedral break? Just verifying and I assume right-right. I have seen some comments to the contrary but right-left seems unusual.
dlh9837011/28/2017 at 12:25 am #80716
The Satellite since 1957 thru the later Series 70-75 have been set up by design to fly right-left. This is the normal set up. There are some fliers for their own reasons have flown them right-right. What ever way you like is fine. The 1/8 washout is at the wing tip, not at the dihedral break.01/13/2018 at 7:53 pm #81263
On fuselage construction, all of the other Satellite plans I have on hand show a fuselage made with two parallel sides closing at the aft end and carved blocks at the forward end to form cheeks. The BMJR short kit I have has a tapered fuselage and no cheek blocks. I am intending to build the aft rudder version. Any thoughts about which style of fuselage to build.
Where it stands right now is the Stab, wing and rudder are built, the engine is picked out (Nova Rossi .61Rex), so the fuselage is the long leg of the tent.
dlh9837001/14/2018 at 7:55 pm #81266flyf2dParticipant
My one from the BMJR kit (long kit) is at the test gliding phase.
We would have test flown it at the recent New Zealand Nats but we lost two days to weather, one day the rain made the fields too wet to safely get cars on and off, the next day it blew 30 knots.
I built the aft rudder version.
Somewhat confusingly the BMJR instruction seem to refer to this as the ‘Aft stab” version, as in aft VERTICAL stab I assume.
My Kit dates back to 2006 so the instructions may have been clarified since.
On the noisy end I shortened the nose up about 3/4″ to allow for the mass and length of the Rossi 61 RV.
I glued the 3 layers of ply together for the Firewall and Landing skid mount then glued that to the fuselage with 1/16 ply exterior side doublers.
The firewall with the mount sticks out past the 2″1/8th wide (2″ plus 2 x 1/16th) Fuselage so I added 3/16″ cheeks to fair it in.
I’ve made such an ugly job of it I think I’ll redo it.
I made a large air inlet hole on the bottom of the fuzz so that when the bladder lets go the fuel will fall out rather than washing around inside the fuselage,(The venturi pulls air from inside the fuselage courtesy of a hole through the mount and firewall).
Running rich the motor tends to have fuel stand off from the Venturi so I have separated the cloud of fuel from the hot exhaust, hopefully.
I have VIT fitted but the short nose and weight of the VIT have given me a CG almost exactly 83 %.
I’d like it further forward with the VIT, say 75%, I welcome advice about the CG position though.
I’d strongly recommend doing what I did with the vertical stab: inset some 1/32 or 1/64th ply around the perimeter.
With a fuselage 6’ long its amazing how many times you whack the rudder onto something, like the workshop rafters, cupboard, doorway, vice, drill press, end of the bench etc01/19/2018 at 5:21 pm #81284
The original Series 70 Satellite 1300 had a 2 1/2 inch round circle firewall. This was the diameter of the Tatone long beam motor mount at the back. The Tatone long beam mount was used, because it fit the S.T..65 rv engines that were used. The fuselage was 2 1/2 inches wide at the front to the end of the pylon. The fuselage started to taper from the end of the pylon to 2 inches wide at the stab leading edge. It tapered from the stab leading edge to 1 inch wide at the stab trailing edge. A filler block was used to close up the rear of the fuselage. 4 balsa filler blocks were added to the inside of the front fuselage at all 4 corners from the front of the pylon to the round plywood fire wall. The balsa blocks and the fuselage sides were sanded to transition from the box fuselage to the round firewall. On these 1300 models, the pylon was just as wide as the fuselage, 2 1/2 inches. Balsa blocks were added at the front and rear of the pylon and tapered to a airfoil shape. They were also hollowed out.We used a pacifier fuel system. There was a compartment made with a opening on the bottom of the fuselage just big enough to fit the pacifier thru it. There was a small 1/8 inch hole drilled on the bottom of the fuselage at the end of the pacifier compartment to act as a air vent when filling the pacifier and to aid in venting out fuel in case the pacifier broke. The pacifier compartment was epoxy coated to fuel proof it. With the exception of the 1300, all the other Satellites regardless of size, had a narrow parallel side fuselage that varied in width from 1 inch on the Satellite 1000 to 1/2 inch on the 1/2A size. these all had balsa cheeks at the front. Regarding the BMJR 1300 kit, there are 3 options on the rudder placement.The standard position mounted on top of the stab, the rudder mounted in front of the stab on the fuselage and the rudder added after the stab at the fuselage end. The cg at 75% with VIT should work out. Some adjustment may be needed after test flight results.01/20/2018 at 10:17 pm #81285
Thanks for all the great information. I see my basic problem is that I misinterpreted the drawing. The BMJR drawing shows left and right elevations in an effort to show the right and down inclination on the firewall. The plan view is not complete as the cheek pieces and firewall is not show. As per usual I was overthinking it. Pictures coming soon. The wing panels, stab and rudder are done. I’m waiting for some spruce to show up before I start the fuselage. Need about 80in of workbench to get it done.
dlh9837001/21/2018 at 12:55 am #81286
My Series 70 Satellite 1300 flies with 2 degrees of left thrust. This counteracts the torque of the S.T. .65 RV motor pulling the model into a hard right bank. The left thrust which is very effective on the first couple of seconds in the power pattern brings the nose up into a steep angle up without the hard right bank.01/21/2018 at 1:54 pm #81288Steve JensenParticipant
“This counteracts the torque of the S.T. .65 RV motor pulling the model into a hard right bank.” Torque causes left roll. Propwash against the pylon causes right roll. Correct?01/21/2018 at 4:58 pm #81290flyf2dParticipant
Thanks for all the information.
My BMJR kit has the fuselage a constant 2″ width from the firewall to the LE of the Horizontal Stab,it then tapers to 1″ at the aft-most point: as Daniel says the drawing doesn’t show any cheek pieces.
I used the Tatone mount but I’m not super confident in it for the R61, I’ll see if I can get one milled up.
The BMJR kit I thought was pretty good though.
Like Daniel I also had a bit of head scratching over the various fuselage drawings, as I’m using it as an Open power model plan fidelity isn’t an issue01/23/2018 at 10:08 pm #81299
Regarding the prop wash against the pylon effect. On the the first 3 Series 70 Satellite 1300 built, the pylon was as wide as the fuselage sides at the pylon area. The front and rear of the pylon were shaped into a tapered section. When the models were first brought out to test fly in April 1970, some questions where raised by other fliers that the wide pylon would increase drag compared to a narrow slab pylon. What happened in reality, the pylon shape was more aerodynamic then we even thought.The fuel residue that usually covers the side of the pylon on the engine exhaust side was almost none existent on the side of the wide pylon with just a small amount on the extreme rear. The prop wash when hitting the wide pylon created almost a boundary layer of air which pushed the fuel residue to the end of the pylon where it tapered off. Pure luck, or pure genius in the original design?
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