1/4 scale Tiger Moth conversion to electric

Andy Hoffer · October 21, 2012, 11:09:52 PM

Way to tame the Moth Michael. It looks great (and so does the happy pilot). Congrats! Next step is to get you up in a Cessna!

Heartiest congrats!

Andy

battlestu · October 22, 2012, 12:02:36 AM

very cool... i wish i saw her fly... got any video?

Michael · October 22, 2012, 11:03:47 AM

No video.

Gregor77 · October 22, 2012, 12:17:41 PM

From one of the images, you need more down thrust... I had the same issue with my 1/5th.. It just pitched up all the time.. I was also max down...

Michael · October 22, 2012, 01:08:26 PM

Good idea.

A little down-thrust, down elevator trim, and a touch more nose weight.

Also need to tighten up elevator control slack, and add more rudder deflection.

Ededge2002 · October 22, 2012, 01:33:54 PM

Quote from: Michael on October 22, 2012, 01:08:26 PM
Good idea.

A little down-thrust, down elevator trim, and a touch more nose weight.

Also need to tighten up elevator control slack, and add more rudder deflection.

The cg looked ok I think Michael. If it was tail heavy those maneuvers at the start would have been unrecoverable. I think the downthrust will solve a lot of the troubles along with getting the trim within range. Just my 2 cents.

Michael · October 22, 2012, 03:21:51 PM

Thanks.

Michael · November 23, 2012, 08:21:39 PM

OK, based on Ed's comment above, and a similar suggestion from Glenn a couple days ago, I am remounting the motor about 3/8" higher but with downthrust, so the propeller is at the same position at the front of the cowl. Other medium and large size Tiger Moth models I've had always had some downthrust built into their designs.

First image shows the new mounting location (higher set of holes) on the firewall.

The second image shows why I want to finish this project as soon as possible. I am planning on starting my next model in December. This photo shoes the cowl behind the transmitter. It's a big airplane.

Michael · November 28, 2012, 03:40:31 PM

Photos re-posted.

Motor mounted with down-thrust and slight side-thrust.

Cowl and spinner installed.

Gregor77 · November 29, 2012, 09:54:52 AM

Looks much better!

Michael · May 19, 2013, 12:06:23 AM

Nice flight today; takeoff to landing!

Photos by Greg H.

Gregor77 · May 22, 2013, 08:50:01 AM

What batteries did you end up using with the 160? 10S? Did that seem to be the right combo or too much power?

10S on my 1/4 pup is too much power IMHO. I am running a 19X8 prop.

Michael · May 22, 2013, 09:36:27 AM

I'm using 10S.

More than enough power, but my plane weighs more than 20 pounds!

Michael · August 10, 2013, 04:46:11 PM

2 nice flights today.
Despite what seemed like 25km gusts, this 25 pound (approx.) flew solid and stable.

Glenn and Jeff helped out. Thanks.

Ededge2002 · August 10, 2013, 05:16:13 PM

Just curious was it the down thrust that solved the troubles?

Big beautiful beast