Thrust Line Location on Firewall

[haribole]

Question for those who fabricated their own engine mount: Could you please confirm if the center point marked with red in the attached picture is the thrust line location on the firewall plane?

Thanks
Hari


ThrustLine.jpg

[alaskabearhawk]

Hari, the only place to measure the thrust line elevation is an extension of the vertical centerline measurement at Station B-P, page 16 of the plans - 18 1/2 inches. It passes through the firewall wherever it passes through. The only parallel (flat spot) of the fuselage to the centerline is the longeron between B and C. It’s important to get B -C correct because so many other measurements depend on this reference. The picture you have posted shows the dimensions to aid in making the firewall. I believe those marks to be centers of arcs to aid in drawing the curves of the firewall.

http://www.mykitlog.com/users/display_log.php?user=yeeeha&project=527&category=3 583&log=96021&row=291

http://www.mykitlog.com/users/display_log.php?user=yeeeha&project=527&category=3 583&log=96022&row=290

[haribole]

Thanks much!!

[Sir Newton]

100% Correct

[spinningwrench]

Using the B-C longeron as level is important when you build your engine mount. You can play around with the engine position to get the required down angle (1 degree on a Patrol)