Author Topic: RSM Distribution P-51 MUSTANG (Read 6583 times)

Rick Henry · « **on:** May 31, 2011, 10:43:05 AM »

Just wondering if anyone has built the Pat Johnston design (RSM) P-51 Mustang? I love Mustangs and I have a Sig Mustang hanging on my wall but the RSM kit looks like a good candidate for a future build. I have one of the Brodak Spitfire kits that Pat designed but the Mustang is a little larger. Is the Mustang still designed around the OS LA 46 engine or something bigger like a ST 51?

Thanks
Rick Henry

Gerald Schamp · « **Reply #1 on:** May 31, 2011, 11:12:54 AM »

Pat started out using a Magnum .53 and changed to an ST .51. Works very well in that plane. Just saw him fly at the Northwest Regionals this weekend and in some pretty nasty conditions and the plane flew well. ST .51 is a good choice IMHO. Gerald Schamp

Gerald Schamp · « **Reply #2 on:** May 31, 2011, 11:16:24 AM »

By the way, forgot to add this, the plane flies extremely well, and looks great in the air. Good choice. Gerald Schamp

Bill Little · « **Reply #3 on:** May 31, 2011, 02:11:54 PM »

HI Rick,

Like Gerald said, a great choice! Miles ahead of the Sig Mustang. I would definitely use the ST .51 or similar. For the LA .46, you would need to be very weight conscious to get the same performance. The ST 51, or similar (Magnum 53 and clones) will give that bit more usable power which is always good.

I would like to someday build one of Pat's Mustangs, but it's the old "tooo many models, not enough time!"

But it is right behind the Rabe Mustang on my favorites for the P-51, scale enough looking and great aerodynamics.

Big Bear

Rick Henry · « **Reply #4 on:** May 31, 2011, 04:14:31 PM »

Thanks guys. I really wish Brodak had a Mustang (built up fuse) in the war birds series in the size range of the Spitfire and Bearcat.

Rick Henry

Bill Little · « **Reply #5 on:** May 31, 2011, 04:44:45 PM »

Quote from: Rick Henry on May 31, 2011, 04:14:31 PM

Thanks guys. I really wish Brodak had a Mustang (built up fuse) in the war birds series in the size range of the Spitfire and Bearcat.

Rick Henry

Hi Rick,

A "modern" P-51 in a 48"-50" wingspan might be a good idea. I really like the original Profile Warbirds with the shortened '57 Green Box Nobler wing.

Stunt Supply (Mike Griffin) did a great kit of the Kenhi Mustang which is a built up fuselage, pretty scale, model which is a very good flier at about a 48" WS. Similar to the old Veco Mustang but possibly better flying.

Big Bear

Geoff Goodworth · « **Reply #6 on:** May 31, 2011, 04:57:33 PM »

Remember folks, that Pat has plans for profile and built up fuselage P-51D models with a wing area of 565 sq in—ideal for an FP 40 or LA 46. Don't know whether the profile is the same as the Brodak kit but I would be surprised if you couldn't turn the Brodak kit into the full fuse version.

Talk to Pat.

Wynn Robins · « **Reply #7 on:** May 31, 2011, 05:00:19 PM »

also pretty sure the RSM kit is not the same as the P51s pat flies - he has developed them a bit further form the kit.......frow what I understand (having both lots of plans)

Bill Little · « **Reply #8 on:** May 31, 2011, 05:24:43 PM »

Quote from: Wynn Robins on May 31, 2011, 05:00:19 PM

also pretty sure the RSM kit is not the same as the P51s pat flies - he has developed them a bit further form the kit.......frow what I understand (having both lots of plans)

That's pretty good to know. Are either set the same as the ones in Model Aviation?

Bill

Randy Powell · « **Reply #9 on:** May 31, 2011, 05:37:21 PM »

If the picture that is shown on RSM web site is indeed the version that's in the kit, then it is the P-51 Mark I. Pat is currently flying the Mark II. Some minor changes but largely the same airplane. Pat can comment on the changes, but they aren't much as I remember.

Does RSM supply the cool fiberglass cowl?

Wynn Robins · « **Reply #10 on:** May 31, 2011, 06:28:28 PM »

Quote from: Randy Powell on May 31, 2011, 05:37:21 PM

If the picture that is shown on RSM web site is indeed the version that's in the kit, then it is the P-51 Mark I. Pat is currently flying the Mark II. Some minor changes but largely the same airplane. Pat can comment on the changes, but they aren't much as I remember.

Does RSM supply the cool fiberglass cowl?

nope - carve your own

Martin Quartim · « **Reply #11 on:** May 31, 2011, 10:10:43 PM »

Pat him self sells lazer cut short kits of all his kits as well as many other kits.

Martin

Bill Little · « **Reply #12 on:** June 01, 2011, 10:49:12 AM »

Quote from: Martin Quartim on May 31, 2011, 10:10:43 PM

Pat him self sells lazer cut short kits of all his kits as well as many other kits.

Martin

Yes, Pat does provide just about any part for any of his designs using his laser cutter. I have several sets of laser cut ribs for his designs. His only problem is that he is a "one man operation" and is too successful!

Generally, though, it is only a matter of a week or two before he gets things out to you. I have found all of his designs that I have seen to be very good flying models! (and he is very prolific in turning out designs)

Big Bear

FLOYD CARTER · « **Reply #13 on:** June 01, 2011, 11:11:13 AM »

Here is a P-51 from the RSM kit. OS 46 AX (converted R/C motor), retracting landing gear. I neglected to incorporate the dihedral specified. It flies well without the dihedral, but doesn't look as nice.

Floyd

Randy Powell · « **Reply #14 on:** June 01, 2011, 11:16:52 AM »

Floyd,

Did you relocate the wing? Generally with Pat's designs that have dihedral, the wing is pretty low and the dihedral brings the leadouts up to the correct position. If dihedral isn't used, you have to raise the wing or your get some vertical CG issues.

Wynn Robins · « **Reply #15 on:** June 01, 2011, 02:41:52 PM »

Quote from: Martin Quartim on May 31, 2011, 10:10:43 PM

Pat him self sells lazer cut short kits of all his kits as well as many other kits.

Martin

I have his take apart mustang short kit - very nice laser cutting and hand selected balsa - TOP STUFF!!!

FLOYD CARTER · « **Reply #16 on:** June 01, 2011, 03:19:36 PM »

Randy. The retracts open exactly 90 deg. I decided that dihedral would make the gear-down "splayed out". Therefore, I built the wing straight. I realize that the wing might be too low for proper vertical C.G. The effect is slight, if any. The P-51 isn't my main stunter- having only a 10-point finish, and all. (maybe 6 points?).

BTW, the gear electronics is the Jomar unit, designed by Joe Utasi.

My most recent retract stunter, a Spitfire, uses my own electronics.

Floyd

Pat Johnston · « **Reply #17 on:** June 02, 2011, 06:47:00 AM »

Guess I can clear up the questions.
The original RSM Mustang was designed per Eric Rule's input and uses a Charles Mackey airfoil. 610 squares and should be just fine with an LA46. Very light building approach incorporated so the overall weight should be close to the low 50 ounce range.
My Mustang which I currently fly is the version I designed using my Bearcat/Mustang airfoil which is thicker than the RSM version. Super lifting section. The wing area was bumped up to 626 inches. Currently a ST51 and 56 ounces. I also deepened the fuselage 1" to get a more realistic scale look. This plane was the feature design in MA, June 2006. The plane is the best plane I have ever flown. Every time I fly it, I fall in love with it all over. This is the sort of plane which makes even me look good.
I have designed a 565 inch version for Brodak which is a scaled down version of my 626 Mustang. An LA46 in it will make it a spectacular plane. Not sure just when it will be released. So far, I am ahead of Brodak so I have a breather there. Also have a profile version of the same 565 size.
I'll post a set of the plane of PDF files for anyone to gander.
Pat

MrSteve09 · « **Reply #18 on:** October 01, 2011, 06:52:09 AM »

Pat and others,...

Any thoughts or interest in a "B" version of the Mustang??

I would think a P-51B would interesting and unique!!

Steve T.

Bob Whitely · « **Reply #19 on:** October 01, 2011, 08:06:49 AM »

Floyd and Others,

Just wanted to keep the record straight the retract landing gear
mechanism known as the Jomar unit was designed by myself. I have the
first unit in a Rabe P51. I gave Joe Utasi the rights to sell it if he wished.
Works well and has never failed on my plane.
Best, RJ

FLOYD CARTER · « **Reply #20 on:** October 01, 2011, 11:35:24 AM »

RJ. I've completely analyzed the Jomar/Utasi/Whitley unit. I'm an electronic engineer with loads of design experience. I can say that this retract unit is CLEVER! (I've never seen a flip flop used as a one-shot)

Floyd

Dan Bregar · « **Reply #21 on:** October 01, 2011, 02:24:30 PM »

Pat Johnston

Man, your Mustang looks good Sir. Any chance Brodak will kit either your FW 190 or P-47 to go along with the 565 sq. in. Mustang ?

Dan