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Thrust line question ?
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Hi guys,
New project Spacewalker 2 40 size..build is going well, nice arf..I do have a question that there is no mention of in the manual..The thrust line looks a little high on the up side to me, the mount is located as per manual shows, no mods..is it my eye or do you guys see it also, will it be ok or should i shim it? Sorry I could not get a shot of the side of fuse at the thrust line, could not hold anything and take a pic at the same time. Motor is mounted equal on the motor mount , if it is off , it is a very very small amount. Thanks Brent |
RE: Thrust line question ?
ORIGINAL: brentg269 Hi guys, New project Spacewalker 2 40 size..build is going well, nice arf..I do have a question that there is no mention of in the manual..The thrust line looks a little high on the up side to me, the mount is located as per manual shows, no mods..is it my eye or do you guys see it also, will it be ok or should i shim it? Sorry I could not get a shot of the side of fuse at the thrust line, could not hold anything and take a pic at the same time. Motor is mounted equal on the motor mount , if it is off , it is a very very small amount. Thanks Brent |
RE: Thrust line question ?
ORIGINAL: ram3500-RCU You can't necessarily go by that. If you have a wing incidence meter, set the tail to level, or if it is flat, use the level on that. Then see if your engine is 90 deg or has some down thrust. The tail should be parallel to the center line of the fuselage, but the wing may have some incidence in it. i dont have a meter, and have not put the tail feathers on yet, I will get that done first and try your suggestion.. I might have gotten ahead of myself, but it just caught my eye and looked more of a up-thrust than any of my other arf builds.. Thanks Brent |
RE: Thrust line question ?
ORIGINAL: brentg269 ORIGINAL: ram3500-RCU You can't necessarily go by that. If you have a wing incidence meter, set the tail to level, or if it is flat, use the level on that. Then see if your engine is 90 deg or has some down thrust. The tail should be parallel to the center line of the fuselage, but the wing may have some incidence in it. i dont have a meter, and have not put the tail feathers on yet, I will get that done first and try your suggestion.. I might have gotten ahead of myself, but it just caught my eye and looked more of a up-thrust than any of my other arf builds.. Thanks Brent |
RE: Thrust line question ?
1 Attachment(s)
[/quote] Chances are, you will be fine. Seems ARFs these days have fire walls that are well set up for the designers intended engine thrust. I did a maiden for a friend a couple weeks ago, on a Pacific Gee Bee Y that looked to me to have over-kill on the engine thrust. It flew great. Never hurts to check though. No thrust is usually not correct (there are exceptions, like the Meister P-47). [/quote] Thanks... I put the hoz tail on and put the rule on like your suggerstion and yes that looks more inline the way it should look.. Thanks for the insight... Brent |
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