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F5J Gliders

Motor Choice Hacker or ?

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Skippers Walker24/02/2020 18:11:59
30 forum posts
5 photos

I'm currently building my first 2M F5J Electric glider. The kit instructions suggest that a Hacker A10-7L geared motor is a suitable power plant.

I've looked extensively at Hacker reviews with some bewilderment, especially with the price of this unit. Has anyone with more experience in this field of flight had any real experience of Hacker motors and their reliability please? Perhaps there are alternative motors I should look at?



Ron Gray24/02/2020 18:29:34
1707 forum posts
479 photos

Have a look here for alternatives- Hyperflight

Mark H7524/02/2020 18:49:57
5 forum posts

Out of interest, what's the reason for a geared motor?

David Hall 924/02/2020 19:23:34
212 forum posts
14 photos

Most 2M F5J models use direct drive 28mm diameter motors. My few run 2826 to 2830 1100Kv motors (on 3S) for their 550-700g weight. One 950g glider that I have needed something more like a 2836 for a good enough climb out.

Hyperflight have direct drive motor that is nearer to 23mm diameter that might work for you if space is really tight.



Edited By David Hall 9 on 24/02/2020 19:24:22

Skippers Walker24/02/2020 19:32:53
30 forum posts
5 photos

From the plan it looks as if the nose area is very tight, maybe that's why the Hacker is suggested (21mm dia). As a matter of interest I did get the kit from Hyperflight. An ADH300L Front Mount is also suggested (about £15!)

My real query/quandary is to ask if Hackers are really worth the extra investment as opposed a cheaper option? (£65 as opposed to £15?)


Dickw24/02/2020 20:20:26
605 forum posts
89 photos

A geared motor will turn a bigger prop and so probably give a faster/steeper climb (if you need it) - compare the prop sizes and performance of the two motors you mention.

Hackers are well made and reliable, but a geared motor is always going to be more expensive as the gearbox can often be the most expensive part.


Skippers Walker24/02/2020 21:21:33
30 forum posts
5 photos

Thanks for the info and suggestions, it’s never too late to learn from experience!


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