• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction). Annual membership also comes with two BiplaneForum.com decals.



CB-1 best climb speed

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Dana

Well-Known Member
*
Joined
Oct 12, 2014
Messages
1,677
Reaction score
901
What are people seeing for the best climb speed (Vy) in a Hatz?

I did a series of tests today, climbing at different speeds. The results surprised me:

50kts IAS 896 fpm
55kts 898 fpm
60kts 858 fpm
65kts 798 fpm
70fkts 662 fpm

This is at 1200# takeoff weight (pilot, no passenger, half fuel), O-290-D engine. Stall speed is 45kts indicated. I expected the best climb to be somewhat higher, at 50kts the airplane is really hanging on the prop pointed at the sky.

upload_2019-4-7_21-10-10.png
 

Latest posts

Back
Top