SkyMaster MB339 Build Thread
#326
RE: SkyMaster MB339 Build Thread
Thank you both guys (furloughed ual and wojtek)
What you tell me makes sense. Funnythat Skymaster never has fixed this. Old mould plugs, perhaps.
Regards,
Robert
What you tell me makes sense. Funnythat Skymaster never has fixed this. Old mould plugs, perhaps.
Regards,
Robert
#327
Join Date: May 2010
Location: Herveybay, AUSTRALIA
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RE: SkyMaster MB339 Build Thread
I have been reading this thread and havent seen any photos of smoke systems , location of smoke tank . I know there are 3 tanks in the plane but i would have thought they were just for fuel ? Any photos out there ?
#328
RE: SkyMaster MB339 Build Thread
I sacrificed one of the saddle tanks for smoke, still enough left for my P160 for 7-8 mins flying time at high power.
My set-up with a double stainless steel tubing, reaching into the exhaust gasses, some 10cm behind the engine does not deliver the smoke I sometimes witness with others. Plus on full throttle the fluid seemed to ignite, as we heard a few times loud bangs with smoke on. (staccato afterburner haha!) Need to experiment more into that with fluids, pump pressures, nozzles and the lot.
As I will be doing a complete overhaul of the innards ( I learned lots of better tricks last few years) I will redo the smoke system also. But I will keep the one tank for smoke. Full of fuel in the three tanks plus another 1,5-2 lt smoke tank will make yr plane too heavy, and possible passing (our) 25kg limit.
Richard
My set-up with a double stainless steel tubing, reaching into the exhaust gasses, some 10cm behind the engine does not deliver the smoke I sometimes witness with others. Plus on full throttle the fluid seemed to ignite, as we heard a few times loud bangs with smoke on. (staccato afterburner haha!) Need to experiment more into that with fluids, pump pressures, nozzles and the lot.
As I will be doing a complete overhaul of the innards ( I learned lots of better tricks last few years) I will redo the smoke system also. But I will keep the one tank for smoke. Full of fuel in the three tanks plus another 1,5-2 lt smoke tank will make yr plane too heavy, and possible passing (our) 25kg limit.
Richard
#329
RE: SkyMaster MB339 Build Thread
Hi,
Of course I can measure my tanks with water before I install the tanks, but: Does anybody know the capacities of the saddle and main tanks?
I wish you all a Happy New Year! (Richard "richbran": Gelukkig nieuw jaar!)
/Robert
Of course I can measure my tanks with water before I install the tanks, but: Does anybody know the capacities of the saddle and main tanks?
I wish you all a Happy New Year! (Richard "richbran": Gelukkig nieuw jaar!)
/Robert
#331
RE: SkyMaster MB339 Build Thread
Richbran, your smoke nozzles are too far back. Put them about 3-4 cm behind the tailcone and about 2cm in from the outer edge of the tailcone. (Towards the edgde of the exhaust, not in the center of it)
#332
RE: SkyMaster MB339 Build Thread
ORIGINAL: Helirupert
Hi,
I wish you all a Happy New Year!
/Robert
Hi,
I wish you all a Happy New Year!
/Robert
Happy new year my friend!
I hope we get better weather next summer, so we can drive our cars and fly our wonderful "jets".
Regards
Lasse Palm
#334
RE: SkyMaster MB339 Build Thread
Thank you Lasse, and Happy New Year to you!
For the moment I am aligning the aileron servo bay mounting tabs/rails (see Post #: 324).
______________________________________________
May the thrust be with you all, this year as every year!
Robert Veenhuizen
For the moment I am aligning the aileron servo bay mounting tabs/rails (see Post #: 324).
______________________________________________
May the thrust be with you all, this year as every year!
Robert Veenhuizen
#335
RE: SkyMaster MB339 Build Thread
I am a little confused about the servo horns. Which sizes should I use where? With the kit are 4 bigger shaped angled and three smaller shaped straight up (see picture). Both sizes are equal in height. First I thought I should use the four bigger on the ailerons and flaps and the three smaller for the elevators and rudder. But there is a possibility, that two of the bigger are meant for the elevators, which implies that two of the straighter horns are meant for e.g. the flaps (more possible movement).
Unfortunately the pictures on the Skymaster web site, under "MB-339 Building Instructions", which illustrate the horn installation, are missing...
Somebody who can help me out with this?
Best regards,
Robert
Unfortunately the pictures on the Skymaster web site, under "MB-339 Building Instructions", which illustrate the horn installation, are missing...
Somebody who can help me out with this?
Best regards,
Robert
#336
RE: SkyMaster MB339 Build Thread
Robert
I made extra ones anyway so to have double horns in which a ball link can be clamped. I use the ball links that have a small "collar" on both sides of the ball for this. For me the best ones are supplied by Toni Clark(page 116 on their catalog http://www.toni-clark.com/ftp/Kat_11...04_2010_de.pdf )
Look at my post 108, in order to have a better angle for the flaps, put them in reverse so You have a better geometry, my flaps stay rock solid when either in UP or DOWN.
I have to look at my model (in the attic at the moment) where I put the smaller ones.
I made extra ones anyway so to have double horns in which a ball link can be clamped. I use the ball links that have a small "collar" on both sides of the ball for this. For me the best ones are supplied by Toni Clark(page 116 on their catalog http://www.toni-clark.com/ftp/Kat_11...04_2010_de.pdf )
Look at my post 108, in order to have a better angle for the flaps, put them in reverse so You have a better geometry, my flaps stay rock solid when either in UP or DOWN.
I have to look at my model (in the attic at the moment) where I put the smaller ones.
#337
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RE: SkyMaster MB339 Build Thread
Hi,
I am planning to replace all the plastic horns with carbon fibre type horns. In case you want matching horns for your SM MB339, Airpower sells both plastic and carbon fibre types.
http://dreamworksrc.com/catalog/airp...pe-p-1316.html
http://dreamworksrc.com/catalog/airp...pe-p-1533.html
http://dreamworksrc.com/catalog/airp...pe-p-1013.html
http://dreamworksrc.com/catalog/airp...pe-p-1019.html
Isaac
I am planning to replace all the plastic horns with carbon fibre type horns. In case you want matching horns for your SM MB339, Airpower sells both plastic and carbon fibre types.
http://dreamworksrc.com/catalog/airp...pe-p-1316.html
http://dreamworksrc.com/catalog/airp...pe-p-1533.html
http://dreamworksrc.com/catalog/airp...pe-p-1013.html
http://dreamworksrc.com/catalog/airp...pe-p-1019.html
Isaac
#338
RE: SkyMaster MB339 Build Thread
ORIGINAL: wojtek
@Lasse Palm
which pipe is in that h500 ? does yours hover level ? My friends needed to be leaned back all the time because of the thrust all the time. I'd Love to build a h500 myself some time ... ( after another 412 )
~V~
@Lasse Palm
which pipe is in that h500 ? does yours hover level ? My friends needed to be leaned back all the time because of the thrust all the time. I'd Love to build a h500 myself some time ... ( after another 412 )
~V~
Sorry for the late replay!
The pipe is from tamjets.
From personal experince, (tuning the Hughes 520 Notar) I know it is very important to follow the CG recommendation fom the manufacturer / Vario,in this case..
Regards
Lasse Palm
#339
RE: SkyMaster MB339 Build Thread
Hi,
I want just to add that the full scale (manned) H500, when hovering, also hangs with its tail...
________________________
Regards,
Robert Veenhuizen
I want just to add that the full scale (manned) H500, when hovering, also hangs with its tail...
________________________
Regards,
Robert Veenhuizen
ORIGINAL: Lasse Palm
Hi Wojtek,
Sorry for the late replay!
The pipe is from tamjets.
From personal experince, (tuning the Hughes 520 Notar) I know it is very important to follow the CG recommendation fom the manufacturer / Vario,in this case..
Regards
Lasse Palm
ORIGINAL: wojtek
@Lasse Palm
which pipe is in that h500 ? does yours hover level ? My friends needed to be leaned back all the time because of the thrust all the time. I'd Love to build a h500 myself some time ... ( after another 412 )
~V~
@Lasse Palm
which pipe is in that h500 ? does yours hover level ? My friends needed to be leaned back all the time because of the thrust all the time. I'd Love to build a h500 myself some time ... ( after another 412 )
~V~
Sorry for the late replay!
The pipe is from tamjets.
From personal experince, (tuning the Hughes 520 Notar) I know it is very important to follow the CG recommendation fom the manufacturer / Vario,in this case..
Regards
Lasse Palm
#342
RE: SkyMaster MB339 Build Thread
Nice pictures Anton.
It looks like you may need some more pressure on the rear gear in order to raise a little bit the tail and lower the nose ?
It looks like you may need some more pressure on the rear gear in order to raise a little bit the tail and lower the nose ?
#343
RE: SkyMaster MB339 Build Thread
ORIGINAL: Gonzalo38
Nice pictures Anton.
It looks like you may need some more pressure on the rear gear in order to raise a little bit the tail and lower the nose ?
Nice pictures Anton.
It looks like you may need some more pressure on the rear gear in order to raise a little bit the tail and lower the nose ?
#344
RE: SkyMaster MB339 Build Thread
Nice pictures of a beautiful aircraft, Anton. I look forward to getting my MB-339 ready just in time for spring
Best regards
Robert Veenhuizen
Best regards
Robert Veenhuizen
#345
Member
RE: SkyMaster MB339 Build Thread
Guys,
I am about to start building a MB 326 from Scratch, 1/4.5 scale .Apparently both the MB 326 and MB 339 used the same wing sections in the full size. I am trying to find out what wing section is used in the MB 339 and what is the wing and horizontal stab incidences of the 339 model.
Look forward to hearing from you all.
regards
Gary
I am about to start building a MB 326 from Scratch, 1/4.5 scale .Apparently both the MB 326 and MB 339 used the same wing sections in the full size. I am trying to find out what wing section is used in the MB 339 and what is the wing and horizontal stab incidences of the 339 model.
Look forward to hearing from you all.
regards
Gary
#347
Join Date: May 2010
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RE: SkyMaster MB339 Build Thread
i havent got that far yet mine arrived 4 days ago , intresting question i am using the o ringed airline quick connect and powerbox sero quick wire connector . I see the factory uses an allen bolt idea to secure the wing .
#348
My Feedback: (73)
RE: SkyMaster MB339 Build Thread
ORIGINAL: smillinollie
Hi there
im just puting one of these together and was wondering how everyone is securing the wings ?
Hi there
im just puting one of these together and was wondering how everyone is securing the wings ?
see my post on
http://www.rcuniverse.com/forum/fb.asp?m=10233062
I use the mounting tabs that slip in under the main wing tube, and also threaded inserts into the wings by the intakes, with bolts holding it from the inside. Rock solid, and easy to secure. I also use DB-9 connectors for the servos and a airpower 5 port quick air fitting ... so wings slip on, 4 bolts in, and that's it , ready to fly
~V~
#350
RE: SkyMaster MB339 Build Thread
ORIGINAL: smillinollie
Hi there
im just puting one of these together and was wondering how everyone is securing the wings ?
Hi there
im just puting one of these together and was wondering how everyone is securing the wings ?