I just noticed on the VectorFlight website ( http://vectorflight.com/ ) that the upper end of the recommended engine size for both the Edge and Extra (66") is now a 120 four-stoke. It used to be 100. Does anyone know when this changed?

I have a VF Edge still NIB from late 2003 that I'm starting on. Has there been any modifcations made since late 2003 to accomodate a bigger engine? Or is it just that VF is now comfortable with recommending a bigger engine?

I'm planning to use a YS 110 in my 66 Edge and just curious if this will require any special mods. I have an email into VF, but just thought I'd check with you folks.

Thanks for your help. I'm looking forward to finally getting this sweet plane built and in the air! [8D]

Here's a reply I received from VF concerning engine selection:


"Thank you for your message. A 1.08 is not recommended as it may put too much stress on the airframe. A 91 2 stroke is the largest we recommend. A 90 4 stroke is also very popular, but many customers use a Saito 100 or YS 110 or Saito 120, all 4 strokes. A 91 2 stroke will provide excellent speed and vertical authority."

Best regards,

C/S
VF


I have a VF Edge 540 on order and plan on either a YS 1.10FZ or a Saito 1.00 as engine selection. The YS 1.10 would be a perfect match for the Edge. As much as I would like to put the YS in my Edge, I am leaning more toward the Saito 1.00. I figure that the extra money I would spend on the YS could be used for other modifications, as needed.

Another flyer by the name of Primodus has the Edge with a Saito 1.20. Check out this thread:
http://www.rcuniverse.com/forum/m_22...tm.htm#2215282

Good luck.

Saito 120 in my Edge 540. Added some balsa triangle blocks to the rear of the firewall for my own personal security. I don't think it really needed them though, it's a well built plane. The 120 provides it with unlimited vertical...as in, it doesn't even slow down going straight up.[X(]

EDIT: I wanted to add the following disclaimer: I think the 120 is overkill for this plane unless you really wanna push it into 3D, which I do not think it is designed for. It builds a bit on the heavy side for a 3D plane of this size. To keep it light and smooth in IMAC style, a Saito 100 or OS91FX would most likely be the better choices. (Call it second thoughts after the fact )

Thanks for the response guys. I also heard back from VF and they said in response to many customers desires to use a larger engine they have tested their Edge and Extra (66" ) with the 120 size. They found their planes can handle it with practical throttle management so they updated the range. They also advise the use of flying wires for extra protection against tail issues if using a larger engine.

I got the feeling they are more comfortable recommending the bigger engines only with the above mentioned precautions instead of just saying the plane will handle it no problem. I agree and think anyone using more than a 100 in this plane should do some basic beefing up like others have said (adding tri-stock to the firewall and flying wires.) It doesn't hurt to have a little extra insurance.

VF customer service continues to impress. They answered my question via email in less than 8 hours and were very helpful, up-front and friendly. Great product, great service, and excellent prices - you just gotta love that. Thanks VectorFlight!

This thing is going to be ballistic with a YS 110. Buuhhuuwaahaahahhaaa