Kevin: Going by numbers only could cause a miss in CG location for your mount moment. I would ensure the craft is done firewall back including wings and place sandbags in seats to get accurate estimated flight weight and place craft on jacks at the rear of front root spar at desired CG location and engineer a way to match engine mount weight and prop and cowling. Hang engine until you balance out the craft to meet your CG requirement. Little things such as battery placement etc. should be placed. Not doing it this way could cause weight to be added to the nose or tail to get the craft to meet CG range. Just my thoughts on the question. Don Taylor-monoplane and KR-2 builder
On Mon, Sep 21, 2020 at 10:02 AM Kevin Stolhammer via KRnet < krnet@list.krnet.org> wrote: > So, my KR 2 (less engine) wieghed in at 331 (276 on mains, 55 on t/w). My > engine weighs 182 (center of mass 11.5" forward of mounts). Can anyone > point me to a specific formula to calculate engine placement? I have my > jig ready to weld the mount, just trying to dial in the spacing from FW to > Eng Mnt. > > Thanks, > Kevin > _______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
