|
|
Post by mossieman on Aug 24, 2008 0:26:02 GMT -5
Hello all! I'm new to the PSSA and the forum and just had a few questions. I obtained a fiberglass fuselage that was made to be used with the Brian Taylor 71" Mosquito plans. After reading most of the how to and construction tips on the site I've decided to attempt a PSS conversion. My questions are;
1. Do I need to increase the wing and/or the tail size to get a model this size to fly well?
2. The fuselage is basically just a shell how much internal structure should I add? I haven't decided whether to go with plug in wings or using a wing joiner and bolting the wing to the fuselage.
Thanks in advance! Any suggestions or comments would certainly be appreciated.
|
|
|
|
Post by Matt Jones on Aug 26, 2008 12:48:57 GMT -5
Sounds like a great project. I've got one of about 60" that I fly electric and power off it glides well so if it were me I'd leave the wing and tail planforms as they should be, what wing section were planning on using? One thing to be acutely aware of is building the tail as light as possible to avoid filleng the nose and/or engine nacelles with lead. The tail moment is much bigger than the nose. If you keep the whole thing light the fuselage shouldn't need much from the wing back, maybe a couple of light ply or ply formers around the wing area for wing attatchment, radio trays etc. I'd have the wing bolt on, keep all the stresses in the wing, not transmit them through the fuselage.
|
|
|
|
Post by mossieman on Aug 26, 2008 22:24:35 GMT -5
Matt, Thanks for the reply!
I'm considering using the Selig - Donovan 6060 as it's profile is pretty close to the airfoil used on the plans. My big concern was how narrow those wings get out at the tip! I guess I'll have to add a little washout when I have the cores cut. I Pulled the plans and fuselage out of storage after my first post and found that who ever built the fiberglass fuselage had the plans blown up to 82" first (I guess to make it IMAA legal). This is going to be one big project. The root chord is 20'' at the fuselage side! The wing saddle is molded into the fuselage so a little re-contouring may be in order. I still need to figure out how I'm going to deal with the radiators on the inboard leading edges and work on a form to have a canopy made up.
My plan is to model an Coastal Strike FB. VI from 143 Squadron (RS625). I may getting a little ahead of myself but we'll be starting into our building season soon and hopefully I can get all the details ironed out before then and get her rolling.
Thanks again for the reply - look forward to talking again.
Robin
|
|
|
|
Post by Matt Jones on Aug 27, 2008 2:05:48 GMT -5
I'd be hesitant using a section that's designed for power if you're starting from scratch. If you're constrained by the root section because of the fuselage then go with that but have it transitional to something more glider friendly at the tip like an E205 etc. This will have the added benefit of creating aerodynamic washout to aid tip stall prevention. In all honesty my mossie has never shown any tendancy to do this even with a much higher wing loading. For the radiatord I'd paint them on. Not ideal for scale but from a distance who will know. Scale ones will add loads of drag and reduce lift.
|
|
