1/4 scale Tiger Moth conversion to electric

Started by Michael, October 09, 2012, 09:11:34 PM

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Andy Hoffer

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

very cool... i wish i saw her fly... got any video?
"I'm disrespectful to dirt. Can you see that I am serious?"

Michael

Michael

Gregor77

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

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.

Michael

Ededge2002

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.
Yea 400W/lb should about do it.. But wouldn't a nice round 500 be better?

Michael

Michael

Michael

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

Michael

Photos re-posted.

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

Cowl and spinner installed.

Michael

Gregor77


Michael

Nice flight today; takeoff to landing!

Photos by Greg H.
Michael

Gregor77

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

I'm using 10S.

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

Michael

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

Glenn and Jeff helped out. Thanks.

Michael

Ededge2002

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

Big beautiful beast
Yea 400W/lb should about do it.. But wouldn't a nice round 500 be better?